2001 Chevrolet Prizm Logo
N
Nathaniel Persson Posted on Jan 25, 2015
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'01 Chevy Prism runs rough, won't start.

Made sure timing chain was good and the TDC marks on the camshaft and crankshaft were lined up perfectly. Changed out all 4 coil packs, installed new spark plugs.

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Randy Ohler

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  • Chevrolet Master 14,585 Answers
  • Posted on Jan 25, 2015
Randy Ohler
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Remove the O2 sensor closest to the engine. Start it. If it runs better, replace the catalytic converter. But fuel pressure and compression are important. I see people waste a lot of money on good parts. Only to be the cats.

Jeff Armer

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  • Chevrolet Master 15,575 Answers
  • Posted on Jan 25, 2015
Jeff Armer
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Why did you change the coils ?It didn't change anything ,did it ? Did you test for spark before hand ? Did you check for fuel pressure ? and did you check fro compression. ? No Start Diagnostic Basics EricTheCarGuy You need to find service repair information for you make an model vehicle. The whole idea is to test not guess ,just replacing parts . You just cost your self more then if you had taken it to a ASE certified repair shop !

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I need a diagram to remove and replace timing chain assembly of 2001 2.4 ltr twin chevy cavalier 8th vin number T

TIMING CHAIN, REPLACE Caution: With the timing chain removed, avoid turning the camshaft or crankshaft. If movement is required, exercise extreme caution to avoid valve damage caused by piston contact. 1. Disconnect and isolate battery ground cable. 2. Drain coolant into suitable container. 3. Remove accessory drive belt. 4. Remove front cover as follows: a. Remove coolant reservoir or surge tank. b. Attach engine support tool Nos. J-28467-360 and J-28467-400, or equivalents, onto alternator stud-ended bolt. c. Remove front cover upper mounting screws. d. Remove engine mount and bracket adapter. Discard adapter bolts. e. Raise and support vehicle with jack stands. f. Remove righthand front wheel and tire assembly, then the righthand splash shield. g. Hold balancer in position using harmonic balancer GM tool No. J-38122, or equivalent, remove mounting bolt and balancer using puller GM tool No. J-24420-C, or equivalent. h. Remove front cover lower mounting bolt. i. Lower vehicle. j. Remove front cover and gaskets. 5. Rotate crankshaft in clockwise direction until camshaft sprocket timing dowel pin holes line up with timing chain housing holes, Fig. 1. 6. Remove timing chain guides. 7. Raise and support vehicle with jack stands. 8. Ensure timing chain slack is above tensioner, then remove tensioner, Fig. 2. 9. Disconnect timing chain from tensioner shoe grooves and remove shoe using suitable screwdriver under timing chain while pulling shoe outward. 10. If removing tensioner shoe is difficult, proceed as follows: a. Lower vehicle. b. Hold intake camshaft sprocket in position with camshaft sprocket wrench GM tool No. J-39579, or equivalent. c. Remove sprocket bolt and washer. d. Remove washer and install bolt into camshaft by hand. e. Position suitable three-jaw puller into intake camshaft sprocket relief holes and remove sprocket. Do not pry on camshaft sprocket as damage to sprocket or timing chain housing may result. 11. Remove mounting bolts and tensioner. Caution: Tensioner is spring loaded. 12. Mark timing chain and crankshaft sprocket for installation. 13. Remove timing chain. 14. Apply adhesive sealant compound GM part No. 12345493, or equivalent, on camshaft sprocket bolt. 15. Hold camshaft sprocket in position with camshaft sprocket GM tool No. J-39579, or equivalent, then tighten mounting bolt and washer. 16. Position camshafts using camshaft sprocket timing alignment pin tools No. J-36800, or equivalent, through camshaft sprockets' into timing chain housing holes, Fig. 1. 17. If camshafts are out of position and must be rotated more than 1/8 turn, proceed as follows: a. Rotate crankshaft clockwise to 90° off TDC. b. Position camshafts and install dowels. c. Rotate crankshaft counterclockwise back to TDC. Caution: Rotating crankshaft clockwise to TDC will damage valves and pistons. 18. Place timing chain over exhaust camshaft sprocket, coolant pump or idler sprocket and crankshaft sprocket. 19. Remove intake camshaft timing pin and attach camshaft sprocket GM tool No. J-39579, or equivalent. 20. Rotate intake camshaft sprocket counterclockwise with tool until timing chain can be installed over sprocket. 21. Release tool. Timing chain tension between camshaft sprockets should tighten. 22. Timing pin should easily fit through intake camshaft sprocket timing hole into timing chain housing timing hole. If timing pin does not fit easily, repeat procedure. 23. With timing pins installed, raise and support vehicle with jack stands. 24. With timing chain slack between intake camshaft sprocket and crankshaft sprocket, timing marks on crankshaft and engine block should be aligned. If crankshaft timing marks are not aligned, move timing chain one tooth forward or rearward to remove slack, then align marks. 25. Load tensioner to zero position by forming keeper out of heavy gauge wire. 26. Apply slight force on tensioner blade to compress plunger. 27. Insert small screwdriver into reset access hole and pry ratchet pawl away from ratchet teeth while forcing plunger completely in hole. 28. Install keeper between access hole and blade. 29. Install tensioner to chain housing and inspect plunger installation again. Ensure long end is toward crankshaft. 30. Lower vehicle enough to remove alignment dowel pins. 31. Rotate crankshaft two revolutions clockwise. 32. Align crankshaft keyway with cylinder block alignment mark and insert timing pins through camshaft sprockets into timing chain housing timing holes. 33. Timing pins should slide easily through timing holes. If timing pins cannot be easily inserted, repeat procedure to properly time engine. 34. Install timing chain guides and front cover. Torque front cover bolts to 108 inch lbs. 35. Torque engine mount bracket adapter bolts to 81 ft. lbs., then tighten an additional 90° turn. 36. Install accessory drive belt. 37. Inspect cooling system and fill to proper level with recommended coolant, as required. 38. Fill engine crankcase to proper level with recommended engine oil. 39. Connect battery ground cable. 40. Start engine and confirm proper operation, and ensure there are no leaks. 41. Clear DTC(s) using a suitably programmed scan tool. 42. These engines do not require a specified bleed procedure. After filling cooling system, run engine to operating temperature with radiator/pressure cap off. Air will then be automatically bled through opening. Hope that helps.
1helpful
1answer

How do you adjust valves on a 2006 3.5L V6 Toyota Avalon?

There is a Toyota Technical Service Bulletin issued for this:-
T-SB-0291-08 September 11, 2008 2GR-FE Valve Timing

Procedure Service Category Engine/Hybrid System Section Engine Mechanical Market USA Applicability YEAR(S) MODEL(S) ADDITIONAL INFORMATION 2005 - 2009 Avalon 2007 - 2009 Camry VDS(s): BK46K 2008 - 2009 Highlander 2006 - 2009 RAV4 Engine(s): 2GR VDS(s): BK31V, BK32V, BK33V, BK34V, ZK31V, ZK32V, ZK33V, ZK34V, ZK35V 2007 - 2009 Sienna Introduction This service bulletin provides information regarding valve timing inspection and service guidelines for vehicles equipped with 2GR-FE engines. © 2008 Toyota Motor Sales, USA Page 1 of 5 T-SB-0291-08 September 11, 2008 Page 2 of 5 2GR-FE Valve Timing Procedure Introduction (Continued) Figure 1. 3 2 1 5 9 8 7 6 4 1 RH Bank Intake Camshaft Timing Gear 2 RH Bank Exhaust Camshaft Timing Gear 3 RH Bank No. 2 Timing Chain 4 Crankshaft 5 Idler Gear 6 Timing Chain 7 LH Bank No. 2 Timing Chain 8 LH Bank Exhaust Camshaft Timing Gear 9 LH Bank Intake Camshaft Timing Gear Warranty Information OP CODE DESCRIPTION TIME OFP T1 T2 N/A Not Applicable to Warranty © 2008 Toyota Motor Sales, USA T-SB-0291-08 September 11, 2008 Page 3 of 5 2GR-FE Valve Timing Procedure Inspection 1. Set the No. 1 cylinder to TDC/compression. A. Set the timing mark to 0 on the timing chain cover by rotating the crankshaft clockwise. B. Verify the timing marks on the camshaft timing gears are in general alignment with the timing marks of the camshaft bearing cap: TIMING MARK IDENTIFICATION CYLINDER BANK INTAKE GEAR MARK EXHAUST GEAR MARK RH Bank (Bank 1) Small Mark Single Line LH Bank (Bank 2) Large Mark Double Line HINT When the engine is correctly timed, the timing marks will NOT perfectly align. Figure 2. Figure 3. RH Bank Exhaust Camshaft Timing Gear 1 2 1 Bearing Cap Timing Mark 2 Gear Timing Mark Figure 4. RH Bank Intake Camshaft Timing Gear 2 1 1 Bearing Cap Timing Mark 2 Gear Timing Mark © 2008 Toyota Motor Sales, USA T-SB-0291-08 September 11, 2008 Page 4 of 5 2GR-FE Valve Timing Procedure Inspection (Continued) Figure 5. LH Bank Intake Camshaft Timing Gear 1 2 1 Bearing Cap Timing Mark 2 Gear Timing Mark Figure 6. LH Bank Exhaust Camshaft Timing Gear 1 2 1 Bearing Cap Timing Mark 2 Gear Timing Mark HINT If the timing marks appear vastly out of alignment, turn the crankshaft one revolution (360 ) clockwise and note the position of the timing marks. Component Removal Guidelines 1. If engine disassembly is required that involves removing the camshafts or timing gears, set the #1 cylinder to TDC compression, wipe away any oil, and mark the following items in relation to each other prior to disassembly: • Timing gears • Timing chain • Timing chain No. 2 NOTE This relationship MUST be maintained. The intake gear is timed in relation to the crankshaft via the timing chain; the exhaust gear is timed in relation to the intake gear via the No. 2 timing chain. © 2008 Toyota Motor Sales, USA T-SB-0291-08 September 11, 2008 Page 5 of 5 2GR-FE Valve Timing Procedure Component Removal Guidelines (Continued) 2. If NEW camshaft timing gears or the No. 2 timing chain are being installed, the two yellow links on the No. 2 timing chain can be used to ensure correct relationship between the intake timing gear and the exhaust timing gear. Figure 7. 1 1 Yellow Link A. Align the paint mark on the timing chain with the intake gear timing mark (to ensure the intake gear is correctly timed to the crankshaft). Figure 8. RH Bank and LH Bank 3 3 4 3 3 4 5 4 5 4 1 2 1 RH Bank 2 LH Bank 3 Yellow Link 4 Gear Timing Mark 5 Timing Chain Paint Mark B. Align the two yellow links on the No. 2 timing chain to the timing marks on
2helpful
1answer

Matching the sprokets pionts with the camshaft levels

Timing marks 2000 Toyota corolla (4E-FE/ 4A-FE/ 5A-FE)

1c8f15cd-1b11-4540-8ded-ce3f879ea3c3.jpg
Align the crankshaft pulley mark with the 0 mark of timing case.
8f3eb447-5885-434e-a05e-4bf613d93b45.jpg
The camshaft sprocket is at TDC when the hole in the sprocket lines up with the notch in the bearing cap

Timing marks 2000 Toyota Corolla (1ZZ-FE/ 3ZZ-FE/ 4ZZ-FE/ 2ZZ-GE)
388d4776-148a-40e2-bc7f-22e918bb72ef.jpg
Set the Crankshaft key in 12 'o Align yellow timing chain mark
Clock position (The key aligns on the crankshaft sprocket
with the mark on the oil pump (see arrow)
body (see arrow mark)
41828b9e-e992-4622-bfca-450c5357f236.jpg
Align the marks on the sprockets Place the crankshaft angle plate
with the yellow links of the timing with the marks B or F, facing
chain. towards you.
3helpful
1answer

How do I time a 2001 Chevy Blazer ZR2 4.3L? Why is it throwing codes in my 01 Chevy Blazer ZR2 4.3L for crankshaft and camshaft sensors?

was the distributor move, sometimes the rotor in the distributor will move just a hair. turn the motor by hand to tdc and see where the rotor is pointing
0helpful
2answers

Need timing gear marks for 2004 Kia Sadona 3.5L engine


Removal & Installation

3.5L Engine

  1. Before servicing the vehicle, refer to the precautions at the beginning of this section.
  2. Record the radio anti theft code data.
  3. Remove or disconnect the following:

    Negative battery cable Engine cover Accessory drive belts Idler pulley Crankshaft pulley Power steering pump pulley Belt tensioner pulley Upper and lower timing belt covers
  4. Support the engine with a floor jack and remove the engine mount.
  5. Rotate the engine to align the camshaft sprocket timing marks with the cylinder head cover timing marks.

    0996b43f8022cb71.jpg enlarge_icon.gifenlarge_tooltip.gif

    Fig. Timing belt routing and timing marks-3.5L Engine

  6. Remove or disconnect the following:

    Auto tensioner Timing belt

    0996b43f8022cb72.jpg enlarge_icon.gifenlarge_tooltip.gif

    Fig. Timing belt and related components-3.5L Engine


To install:
  1. Ensure that the engine is set to Top Dead Center (TDC).
  2. Prepare the auto tensioner for installation by compressing it in a vise and installing a retaining pin.
  3. Install the timing belt in the following order:
    1. Crankshaft sprocket
    2. Idler pulley
    3. Left bank exhaust camshaft sprocket
    4. Left bank intake camshaft sprocket
    5. Water pump pulley
    6. Right bank intake camshaft sprocket
    7. Right bank exhaust camshaft sprocket
    8. Tensioner pulley

  4. Install the auto tensioner. Do not remove the retaining pin at this time.
  5. Check that the crankshaft and camshaft timing marks are aligned correctly.
  6. Rotate the crankshaft 1 / 4 turn Counterclockwise .
  7. Rotate the crankshaft 1 / 4 turn Clockwise to return the engine to TDC.
  8. Loosen the tensioner pulley center bolt.
  9. Apply 44 inch lbs. (5 Nm) torque to the tensioner pulley as shown and tighten the center bolt to 32-41 ft. lbs. (43-55 Nm).

    0996b43f8022cb73.jpg enlarge_icon.gifenlarge_tooltip.gif

    Fig. Adjusting the tensioner pulley-3.5L Engine

  10. Remove the auto tensioner retaining pin.
  11. Rotate the crankshaft 2 revolutions Clockwise , then wait 5 minutes for the auto tensioner to adjust.
  12. Measure the auto tensioner rod as shown. If the measurement is not 3.8-4.5 mm, then repeat the belt tensioning procedure.

    0996b43f8022cb74.jpg enlarge_icon.gifenlarge_tooltip.gif

    Fig. Measuring the auto tensioner rod-3.5L Engine

  13. When the auto tensioner measurement is correct, install or connect the following:

    Engine mount Upper and lower timing belt covers Belt tensioner pulley Power steering pump pulley Crankshaft pulley Idler pulley Accessory drive belts Engine cover Negative battery cable
  14. Reprogram the radio anti theft codes.

    Kia_Sedona_2002-2006
    Timing Chain, Sprockets, Front Cover & Seal

    Print


    Removal & Installation

    3.8L Engine

    1. Before servicing the vehicle, refer to the precautions at the beginning of this section.
    2. Record the radio anti theft code data.
    3. Remove the engine from the vehicle.
    4. Remove the drive belt. Remove the power steering pump. Remove the air conditioning compressor.
    5. Remove the alternator. Remove the drive belt idler. Remove the drive belt tensioner. Remove the water pump pulley. Remove the intake manifold.
    6. Remove the connector bracket from the left cylinder head cover. Disconnect the right ignition coil connector, condenser connector and remove the bracket.
    7. Remove the left cylinder head cover retaining bolts. Remove the cylinder head cover from the engine.
    8. Remove the right cylinder head cover retaining bolts. Remove the cylinder head cover from the engine.
    9. Set the No. 1 cylinder to TDC on the compression stroke. Turn the crankshaft pulley and align its groove with the timing mark T of the lower timing chain cover.
    10. Check that the mark of the camshaft timing sprockets are in straight line positioning on the cylinder head surface. If not rotate the crankshaft 360 degrees. Do not rotate the engine counterclockwise.
    11. Remove the oil pan. Remove the crankshaft damper pulley. Remove the timing chain cover.
      NOTE Be careful not to damage the contact surfaces of the cylinder block, cylinder head and timing chain cover. Before removing the timing chain, mark the right and left timing chains with an identification mark based on the location of the sprocket because the identification mark on the chain for TDC can be erased.
    12. After compressing the timing chain tensioner, install a set pin. Remove the right cam to cam guide. Remove the right timing chain auto tensioner and timing chain tensioner arm.
    13. Remove the oil pump chain cover. Remove the oil pump chain tensioner assembly. Remove the oil pump chain guide. Remove the right timing chain.
    14. Remove the right timing chain guide. Remove the oil pump chain sprocket and oil pump chain. Remove the crankshaft sprocket, oil pump and camshaft drive gear.
    15. Remove the left cam to cam guide. Remove the left timing chain auto tensioner and timing chain tensioner arm. Remove the left timing chain.
    16. Remove the left timing chain guide. Remove the crankshaft sprocket and left camshaft drive. Remove the tensioner adapter assembly.

      0996b43f8020193b.jpg enlarge_icon.gifenlarge_tooltip.gif

      Fig. Timing chain and related components-3.8L Engine


    To install:
    1. Check the camshaft and crankshaft sprockets for wear and damage, replace as required.
    2. Inspect the tensioner arm and chain guide for wear and damage, replace as required.
    3. Check that the tensioner pin moves smoothly when the ratchet pawl is released with a thin rod.
    4. The key of the crankshaft should be aligned with the timing mark of the timing chain cover. This indicates that the piston is at TDC on the compression stroke.
    5. Install the tensioner adapter assembly. Install the crankshaft sprocket and left camshaft drive.
    6. Install the left timing chain guide and torque the retaining bolts 14-18 ft. lbs.
    7. Install the left timing chain. Be sure to install the chain with no slack between the camshaft and the crankshaft (crankshaft sprocket, timing chain guide, exhaust camshaft sprocket, intake camshaft sprocket). The timing mark of each sprocket should be matched with the timing mark (color ink) of the timing chain at installation of the timing chain.

      0996b43f80201924.jpg enlarge_icon.gifenlarge_tooltip.gif

      Fig. Left timing chain markings and installation: (D) exhaust camshaft sprocket (C) intake camshaft sprocket-3.8L Engine

    8. Install the left timing chain tensioner arm and torque the retaining bolts 14-16 ft. lbs.
    9. Install the left timing chain tensioner and torque the retaining bolts 7-9 ft. lbs.
    10. Install the left cam to cam guide and torque the retaining bolts 7-9 ft. lbs.
    11. Install the crankshaft sprocket, oil pump and right camshaft drive.
    12. Install the oil pump chain and oil pump sprocket. Torque the retaining bolt to 14-16 ft. lbs.
    13. Install the right timing chain guide. Torque the retaining bolts to 14-18 ft. lbs.
    14. Install the right timing chain. Be sure to install the chain with no slack between the camshaft and the crankshaft (crankshaft sprocket, intake camshaft sprocket, exhaust camshaft sprocket). The timing mark of each sprocket should be matched with the timing mark (color ink) of the timing chain at installation of the timing chain.

      0996b43f80201925.jpg enlarge_icon.gifenlarge_tooltip.gif

      Fig. Right timing chain markings and installation: (C) exhaust camshaft sprocket (B) intake camshaft sprocket-3.8L Engine

    15. Install the right timing chain tensioner arm. Torque the retaining bolts to 14-17 ft. lbs.
    16. Install the right timing chain auto tensioner. Torque the retaining bolts to 7-9 ft. lbs.
    17. Install the right cam to cam guide and torque the retaining bolts to 7-9 ft. lbs.
    18. Install the oil pump chain guide. Torque the retaining bolts to 7-9 ft. lbs.
    19. Install the oil pump tensioner assembly. Torque the retaining bolts to 7-9 ft. lbs.
    20. Pull out the pins on both the left and right hydraulic tensioners. Install the oil pump chain cover.
    21. Rotate the crankshaft two revolutions in the clockwise direction. Confirm the timing mark. Be sure to rotate the crankshaft in the clockwise direction.
    22. Apply sealant on the chain cover and on the cylinder head, cylinder block, and lower oil pan. Be sure these parts are free of engine oil and dirt.
      NOTE Before assembling the timing chain cover, the liquid sealant TB1217H should be applied on the gap between the cylinder head and block. The part must be assembled with five minutes after the sealant is applied.


      0996b43f80201926.jpg enlarge_icon.gifenlarge_tooltip.gif

      Fig. Sealant application (1 inch bead width)-3.8L Engine

    23. Apply sealant on the chain cover.
      NOTE The liquid sealant TB1217H should be applied on the gap between the cylinder head and block. The part must be assembled with five minutes after the sealant is applied.


      0996b43f80201927.jpg enlarge_icon.gifenlarge_tooltip.gif

      Fig. Timing cover sealant application-3.8L Engine

    24. Install a new gasket to the timing case cover.
      NOTE It is important that the dowel pins on the cylinder block and holes on the timing chain cover should be used as a reference in order to assemble the timing chain cover in the correct position.


      0996b43f80201928.jpg enlarge_icon.gifenlarge_tooltip.gif

      Fig. Timing cover gasket installation (A) gaskets-3.8L Engine

    25. Install the timing chain cover. Torque the retaining bolts in the proper sequence and to specification. The engine should not be started for at least thirty minutes after timing chain cover assembly.

      0996b43f80201929.jpg enlarge_icon.gifenlarge_tooltip.gif

      Fig. Timing cover bolt torque sequence and specification-3.8L Engine

    26. Install the timing case cover oil seal.
    27. Continue the installation in the reverse order of the removal procedure.
0helpful
1answer

94 yota pickup V6. Timing belt failed, replaced it, now it's running rough and lacks power. Ideas?

The engine is a free running type so bent valves should not be the problem. Recheck the timing marks on the camshafts and crankshaft. If you are one timing belt tooth off, the engine could run but run rough. With the number 1 cylinder piston at top dead center, the camshaft marks should be lined up with their "TDC" marks and the crankshaft mark should be at 0 deg.

If the distributor was removed during the belt replacement, make sure it is in time with the crankshaft timing mark. When the No. 1 cylinder piston is at top dead center, the crankshaft timing mark should be on 0 deg. and the distributor rotor should be pointing to the number 1 terminal on the distributor cap at the same time.
0helpful
1answer

Timing belt is broken is a belt or chain

chain. R&R instructions from autozone.com pasted below. let me know if you have any more questions.


REMOVAL & INSTALLATION
SOHC Engine See Figures 1, 2, 3 and 4

  1. Disconnect the negative battery cable.
  2. Remove the timing chain front cover.

During timing chain and sprocket removal, position the crankshaft 90 degrees past Top Dead Center (TDC), to make sure the pistons will not contact the valves upon assembly.
  1. Carefully rotate the crankshaft clockwise so the timing mark on the crankshaft sprocket and keyway align with the main bearing cap split line (90 degrees past TDC).
  2. Remove bolts, then remove the timing guides and tensioner.
  3. Remove the camshaft sprocket bolt, using a 7 / 8 in. (21mm) wrench to hold the camshaft. Then remove the timing chain and camshaft sprocket. Remove the crankshaft sprocket, if necessary.

To install:
  1. Inspect the chain for wear and damage. Check the inside diameter of the chain, it should be no more than 16.77 in. (426mm). Inspect the chain guides for wear or cracks and the timing sprockets for teeth or key wear. Replace components as necessary.
  2. Verify that the crankshaft is positioned 90 degrees clockwise past TDC from the keyway (keyway at 3 o'clock).
  3. Bring the camshaft up to No. 1 TDC by loosely installing the sprocket and rotating the sprocket until the timing pin can be inserted. The camshaft contains wrench flats to assist in turning the shaft. The dowel pin should be at 12 o'clock when the camshaft is at TDC and a timing pin ( 3 / 16 in. drill bit) should then install at about the 8 o'clock position.
  4. If removed, install the crankshaft sprocket, then rotate the crankshaft counterclockwise 90 degrees up to No. 1 TDC (keyway at 12 o'clock).
  5. Position the chain under the crankshaft sprocket and over the camshaft sprocket. If necessary remove the camshaft sprocket, then slide the camshaft sprocket into position with the chain already engaged. The timing chain should be positioned so that one silver link plate aligns with the reference mark on the camshaft sprocket and the other aligns with the downward tooth (at the 6 o'clock position) on the crankshaft sprocket. The letters FRT on the camshaft sprocket must face forward, away from the cylinder head and excess chain slack should be located on the tensioner side of the block.
  6. Temporarily install the timing pin to verify proper alignment of the camshaft and sprocket, then install and tighten the sprocket bolt to 75 ft. lbs. (102 Nm). Again, use a wrench on the camshaft flats to hold the shaft in position while tightening the bolt. Do not allow the camshaft retaining bolt to torque against the timing pin or cylinder head damage will result.
  7. Install the chain guides with the words FRONT facing out. Install the fixed guide first and verify the chain is snug against the guide, then install the pivot guide. Tighten the bolts to 19 ft. lbs. (26 Nm) and verify that the pivot guide moves freely.
  8. Retract the tensioner plunger and pin the ratchet lever using a 1 / 8 in. No. 31 drill bit inserted in the alignment hole at the bottom front of the component. Install the tensioner and tighten the bolts to 14 ft. lbs. (19 Nm), then remove the drill bit.
  9. Make one final check to verify all components are properly timed, then remove all timing pins.
  10. Install the timing chain front cover.
  11. Connect the negative battery cable, start the engine and check for leaks.

jturcotte_7.gif

Fig. Fig. 1: At 90 degrees past TDC, the crankshaft sprocket timing mark and keyway will align with the main bearing cap split line



jturcotte_8.gif


Fig. Fig. 2: Exploded view of the timing chain and sprocket assembly-SOHC engine


jturcotte_9.gif

Fig. Fig. 3: Insert the timing pin to ensure that the camshaft is at No. 1 TDC-SOHC engine



jturcotte_10.gif

Fig. Fig. 4: When the camshaft is at TDC, rotate the crankshaft counterclockwise 90 degrees to achieve TDC

1helpful
1answer

Dont no how to set the timming and what it suppose to be

Timing Chain and Sprockets
REMOVAL & INSTALLATION




  1. Fig. 1: At 90 degrees past TDC, the crankshaft sprocket timing
    mark and keyway will align with the main bearing cap split line
    84193100.gif






    Fig. 2: Exploded view of the timing chain and sprocket
    assembly - SOHC engine
    84193101.gif






    Fig. 3: Insert the timing pin to ensure that the camshaft is at
    No. 1 TDC - SOHC engine
    84193102.gif






    Fig. 4: When the camshaft is at TDC, rotate the crankshaft
    counterclockwise 90 degrees to achieve TDC
    84193103.gif


DOHC Engine

  1. Disconnect the negative battery cable.
  2. Remove the timing chain front cover.
    NOTE: During timing chain and sprocket removal, position the
    crankshaft 90 degrees past Top Dead Center (TDC) to make sure the pistons will
    not contact the valves upon assembly.



  3. Carefully rotate the crankshaft clockwise so the timing mark on the
    crankshaft sprocket and keyway align with the main bearing cap split line.
  4. Remove the bolts, then remove the timing guides and tensioner.
  5. Remove the camshaft sprocket bolts, using a 7?8 in. (21mm) wrench
    to hold the camshaft. Then remove the timing chain and camshaft sprocket. Remove
    the crankshaft sprocket, if necessary.
    To install:

  6. Inspect the chain for wear and damage. Check the inside diameter of the
    chain, it should be no more than 23.15 in. (588mm). Inspect the chain guides for
    wear or cracks and the timing sprockets for teeth or key wear. Replace
    components as necessary.
  7. Verify that the crankshaft is positioned 90 degrees clockwise past TDC. The
    crankshaft keyway should be at 3 o'clock aligned with the main bearing cap split
    line to prevent piston and valve damage.
  8. Install the camshaft sprockets, retaining bolts and washers. Make sure the
    letters FRT on the sprockets face forward, away from the cylinder block. Use the
    wrench flats provided on the camshafts to hold the shaft and tighten the bolts
    to 75 ft. lbs. (102 Nm).
  9. Bring the camshafts up to No. 1 TDC by rotating the camshafts and sprocket
    until the dowel pins are at 12 o'clock. Install a 1?6 in. drill bit
    into the hole in the sprocket about 9 o'clock.
  10. If removed, install the crankshaft sprocket, then rotate the crankshaft
    counterclockwise 90 degree up to No. 1 TDC (keyway and sprocket timing mark at
    12 o'clock, in alignment with the block timing mark).
  11. Position the timing chain under the crankshaft sprocket and over the
    camshaft sprockets so 2 silver link plates align with the reference marks on the
    camshaft sprockets and another 2 plates align with the downward tooth (at 6
    o'clock position) on the crankshaft sprocket. Excess chain slack should be
    located on the tensioner side of the cylinder block.
  12. Verify that the crankshaft reference mark aligns with the cylinder block
    mark at 12 o'clock and that the timing pins are installed in the holes at about
    the 9 o'clock position. Remove the timing pins from the camshaft sprockets.
  13. Install the timing chain fixed guide to the right of the block face toward
    the water pump. Tighten the bolts to 21 ft. lbs. (28 Nm) and verify the chain is
    snug against the guide.
  14. Install the pivoting chain guide and check for clearance between the block
    and head. Tighten the bolt to 19 ft. lbs. (26 Nm) and verify the guide pivots
    freely.
  15. Install the 2 forward camshaft bearing caps and the upper timing chain
    guide, then tighten the retaining bolts to 124 inch lbs. (14 Nm).
  16. Retract the tensioner plunger and pin the ratchet lever using a 1?8 in. (3.18mm) No.
    31 drill bit inserted in the alignment hole at the lower front of the component.
    Install the tensioner and tighten the bolts to 14 ft. lbs. (19 Nm), then remove
    the drill bit.
  17. Make one final check to verify all components are properly timed, then
    remove all timing pins.
  18. Install the timing chain front cover.
  19. Connect the negative battery cable, start the engine and check for leaks.





    Fig. 5: Rotate the crankshaft clockwise until the timing mark
    on the crankshaft sprocket and keyway align with the main bearing cap split line

    89563pb1.jpg






    Fig. 6: Loosen the timing chain tensioner mounting bolt . . .
    89563pb4.jpg






    Fig. 7: . . . and remove the tensioner from the engine block
    89563pb7.jpg






    Fig. 8: Retract the tensioner plunger and pin the ratchet lever
    with a 1?8
    in. (3.18mm) drill bit inserted in the alignment hole
    89563pb5.jpg






    Fig. 9: Remove the mounting fasteners from both timing guides .
    . .
    89563pb8.jpg






    Fig. 10: . . . and remove the timing guides from the engine
    89563pc1.jpg






    Fig. 11: Remove the camshaft sprocket bolts, using a 7?8 in. (21mm) wrench
    to hold the camshaft
    89563pc2.jpg






    Fig. 12: Remove the timing chain and camshaft sprockets
    89563pc4.jpg






    Fig. 13: Insert the timing pins to verify that the camshafts
    are at TDC
    84193146.gif






    Fig. 14: Make sure that the silver link plates and reference
    marks are all in alignment as shown
    84193145.gif



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2answers

I am planning to replace the timing belt on my daughter's 95 Corolla and was wondering what I need to align where before removing the belt eg How do I find TDC? Camshaft pulley and Crankshaft pulley...

TDC is top dead center/ remove spark plug on cylinder no. 1/ rotate the crankshaft pulley using a socket wrench and power handle and check if the piston on your cylinder no. 1 reach the top center that is TDC/ remove timing belt cover and locate a synchronized marking on your camshaft and crankshaft pulley/ remove old timing belt/ install a new one but make sure that the mark on your camshaft and crankshaft is perfectly synchronized before putting the cover/ manually rotate the crankshaft pulley again and see if it rotates 360 deg. freely then you can be sure you did the job correctly.
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1answer

91 chevy G20

well not sure exactly why it wont line up use something to turn the crank and cam to appropiate position start sliding crank gear until cam gear is touching then start to push both at same time make sure your crank key and cam pin are bothin place On many OHV pushrod engines, the crankshaft sprocket is installed on the crankshaft nose and the crankshaft is rotated to position piston #1 at TDC. At this point, a mark stamped onto the crankshaft sprocket is pointing directly upward (toward the camshaft).
The camshaft sprocket is then temporarily bolted to the cam and used to rotate the cam until a mark stamped on the cam sprocket is pointing directly downward (toward the crankshaft). The sprocket is then removed from the cam (without allowing the cam to rotate).
The timing chain is looped over the cam gear, the mark on the cam gear is positioned directly downward, and the chain is looped around the crankshaft sprocket. When the cam sprocket is attached to the cam, the timing marks on the crank and cam sprockets should be pointing toward one another.
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