Question about 1997 Chevrolet S-10 Pickup

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Changed timing chain on a 2000 astro 4.3, new chain is as loose as the original one, maybe 1/2 in of play, is this normal? i keep getting crankshaft and camshaft correlation code, distributer is set right as is the timing chain , could the computer be at fault, if i set distibuter one tooth of it runs better but very hard starting, acts like computer cant adjust for the diffrence in timing of cam and crank

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  • Jeff Turcotte
    Jeff Turcotte May 29, 2011

    The computer cannot correct for a chain that is not timed properly. Did you replace the gears with the chain? The gears can also cause a loose chain.

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  • Chevrolet Master
  • 2,100 Answers

Usually the timing chain has a nylon slide to rub against to keep tension on it, or a wheel, 1/2 inch doesn't sound too bad, not like it is going to jump time. The dist being moved one tooth, I'm surprised it even runs. I would get the number one piston to TDC, check it with timing mark, pull the dist and put the rotor on number one spark plug, follow the wire, then get it running, and make adj from there, if it needs to be retarded to run or start, move it, a timing light will show it come up about 5 degrees BTDC. If all else fails, check the cam sensor, it will cause it to run crazy. Hope this helps.

Posted on May 29, 2011

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1 Answer

I am changing the timing chain in a 1993 Chevy S-10 with a 4.3L engine. I was told you have to disconnect a wire to reset it but I don't know where the wire is.


Timing Chain: Service and Repair
REMOVAL
Tools Required = Crankshaft Sprocket Puller
1. Remove the timing cover.
2. Remove the crankshaft position sensor reluctor ring.
3. Remove the camshaft sprocket bolts.
4. Remove camshaft sprocket.
5. Remove timing chain.
6. Remove the crankshaft sprocket.
7. Remove crankshaft sprocket key.

INSTALLATION
1. Install the key into the crankshaft keyway.
2. Use the crankshaft balancer installer to install the crankshaft sprocket.
3. Install the camshaft sprocket and timing chain.
4. Install camshaft sprocket bolts.
Be sure to align the camshaft and the crankshaft sprocket marks. Timing marks (Number 4 Firing).
Tighten bolts to 21 ft. lbs.
5. Align the keyway on the reluctor ring with the key in the crankshaft.
6. Install the reluctor ring onto the crankshaft until the ring is completely seated against the crankshaft sprocket.
7. Install the timing cover.

Don't know what Wire you are referring to.

Jul 30, 2013 | Cars & Trucks

1 Answer

How do i reset the timing on 2001 2.7l concorde if the chain was replaced and the timing is off


Did you take pictures while removing the originals? It's always a good habit. Below are the instructions you need to follow. Your own pics are very helpful when doing a big job like this.
  1. Disconnect negative battery (1) cable.
  2. Drain cooling system.
  3. Remove upper intake manifold.
  4. Remove cylinder head covers, crankshaft vibration damper, and timing chain cover.
CAUTION: When aligning timing marks, always rotate engine by turning the crankshaft. Failure to do so will result in valve and/or piston damage.
117014297

  1. Align crankshaft sprocket timing mark to mark on oil pump housing (2). The mark on oil pump housing is 600 ATDC of #1 cylinder.
CAUTION: When the timing chain is removed and the cylinder heads are still installed, DO NOT rotate the camshafts or crankshaft without first locating the proper crankshaft position. Failure to do so will result in valve and/or piston damage.
117016938

  1. Remove primary timing chain tensioner retainer cap (2) and tensioner (1) from right cylinder head.
117016939

  1. Disconnect and remove camshaft position sensor (4) from left cylinder head.
  2. Remove timing chain guide access plugs (3) from cylinder heads.
NOTE: When camshaft sprocket bolts are removed, the camshafts will rotate in a clockwise direction.
  1. Starting with the right camshaft sprocket, remove the sprocket attaching bolts. Remove camshaft damper (1) (if equipped) and sprocket.
  2. Remove left side camshaft sprocket attaching bolts and remove sprocket.
  3. Remove lower chain guide (7) and tensioner arm (8).
  4. Remove the primary timing chain (5).
  5. Remove crankshaft sprocket (6).
INSTALLATION
117016940

  1. Inspect all sprockets (4,9,11) and chain guides (2,5,10). Replace if worn.
  2. For crankshaft sprocket installation procedures Refer to CRANKSHAFT SPROCKET.
  3. If removed, install right and left side short chain guides (11). Tighten attaching bolts to 28 Nm (250 inch lbs.) .
  4. Align crankshaft sprocket timing mark to the mark on oil pump housing (3).
NOTE: Lubricate timing chain and guides with engine oil before installation.
  1. Place left side primary chain sprocket onto the chain so that the timing mark is located in-between the two (plated) timing links (1).
117016941

  1. Lower the primary chain with left side sprocket through the left cylinder head opening.
NOTE: The camshaft sprockets can be allowed to float on the camshaft hub during installation.
  1. Loosely position left side camshaft sprocket over camshaft hub.
  2. Align timing (plated) link to the crankshaft sprocket timing mark (3).
  3. Position primary chain onto water pump drive sprocket (10).
  4. Align right camshaft sprocket timing mark to the timing (plated) link on the timing chain (8) and loosely position over camshaft hub.
  5. Verify that all chain timing (plated) links are properly aligned to the timing marks on all sprockets.
  6. Install left side lower chain guide (2) and tensioner arm (5). Tighten attaching bolts to 28 Nm (250 inch lbs.) .
NOTE: Inspect O-ring on chain guide access plugs before installing. Replace O-ring as necessary.
  1. Install chain guide access plugs to cylinder heads. Tighten plugs to 20 Nm (15 ft. lbs.) .
NOTE: To reset the primary timing chain tensioner, engine oil will first need to be purged from the tensioner.
117016942

  1. Purge oil from timing chain tensioner using the following procedure:
    1. Place the check ball (2) end of tensioner into the shallow end of Special Tool 8186 (3).
    2. Using hand pressure, slowly depress tensioner until oil is purged from tensioner.
117016943

  1. Reset timing chain tensioner using the following procedure:
    1. Position cylinder plunger (4) into the deeper end of Special Tool 8186 (3).
    2. Apply a downward force until tensioner is reset.
NOTE: If oil was not first purged from the tensioner, use slight finger pressure to assist the center arm pin of Special Tool 8186 to unseat the tensioner's check ball.

CAUTION: Ensure the tensioner is properly reset. The tensioner body (4) must bottom against the top edge of Special Tool 8186 (3). Failure to properly perform the resetting procedure may cause tensioner jamming.

NOTE: Inspect the tensioner O-ring (2) for nicks or cuts and make sure the snap ring (1) is correctly installed, replace as necessary.
117016944

  1. Install the reset chain tensioner (1) into the right cylinder head.
  2. Position tensioner retaining plate (2) and tighten bolts (1) to 12 Nm (105 inch lbs.) .
117016945

  1. Starting at the right cylinder bank, first position the camshaft damper (1) (if equipped) on camshaft hub, then insert a 3/8 square drive extension with a breaker bar into intake camshaft drive hub. Rotate camshaft until the camshaft hub aligns to the camshaft sprocket and damper attaching holes. Install the sprocket attaching bolts and tighten to 28 Nm (250 inch lbs.) .
  2. Turn the left side camshaft by inserting a 3/8 square drive extension with a breaker bar into intake camshaft drive hub and rotate camshaft until the sprocket attaching bolts can be installed. Tighten sprocket bolts to 28 Nm (250 inch lbs.).
  3. Rotate engine slightly clockwise to remove timing chain slack, if necessary.
117016946

  1. Activate the timing chain tensioner by using a flat bladed pry tool to gently pry tensioner arm towards the tensioner slightly. Then release the tensioner arm. Verify the tensioner is activated (extends).
117016947

  1. Install camshaft position sensor (2) and connect electrical connector.
  2. Install the timing chain cover, crankshaft vibration damper, and cylinder head covers.
  3. Install upper intake manifold.
NOTE: After installation of a reset tensioner, engine noise will occur after initial start-up. This noise will normally disappear within 5-10 seconds.
  1. Fill cooling system.

Mar 27, 2013 | 2001 Chrysler Concorde

2 Answers

My timing chain sounds loose. can it be adjusted or should it be replaced? 2003 nissan altima 2.0


If it is running loose for a long time and is worn then should be replaced as soon as
But if the tensioner has come loose which it shouldn't have then an inspection of the links will further tell you if it should be replaced.There are ways to inspect the timing chain.This is a rough guide.

Timing Chain and Sprockets Cleaning and Inspection
  1. Clean the components with cleaning solvent.
    Caution Wear safety glasses in order to avoid eye damage.

  2. Dry the components with compressed air.
    tiftogif.gif

  3. Inspect the timing chain for binding or wear.
    tiftogif(1).gif

  4. Inspect the camshaft and crankshaft sprockets for:
    • Worn teeth (1)
    • Damaged teeth (2)
    • Chipped teeth (3)
    • Worn valleys between the sprocket teeth

    tiftogif(2).gif

  5. Inspect the crankshaft sprocket keyway for wear.
  6. Inspect the crankshaft sprocket oil pump drive splines for wear.
    tiftogif(3).gif

  7. Inspect the chain guide (232) for the following conditions:
    • Loose metal inserts (1)
    • Cracking (2) in the chain contact area
    • Excessive grooves (3) in the chain contact area Grooves 1 mm (0.040 in) or less in depth are to be considered normal wear.

Sep 08, 2011 | 2003 Nissan Altima

1 Answer

Head gasket got bent and I have replaced it . Now the problem I'm facing is how to set the crank shaft and the comshaft timing. I need the procedure for engine timing


Timing Chain & Gears Removal & Installation To Remove:
NOTE: Keep the cam chain away from magnetic fields.
Crankshaft set at TDC marks hnda_trk_crv_crank_tdc_marks.gif

  1. Turn the crankshaft pulley so its Top Dead Center (TDC) mark (1) lines up with the pointer (2).
  2. Raise and support the vehicle.
  3. Remove the front tires/wheels. Front undercar splash shield hnda_trk_crv_frt_under_splsh_shld.gif

  4. Remove the front undercar splash shield.
  5. Remove the drive belt.
  6. Remove the cylinder head cover (See section on Valve Cover).
  7. Remove the crankshaft pulley (See section on Crankshaft Damper). CKP sensor and VTC solenoid electrical connectors hnda_trk_crv_ckp_vtc_ele_conn.gif

  8. Disconnect the Crankshaft Position (CKP) sensor connector (1) and Variable Valve Timing Control (VTC) oil control solenoid valve connector (2).
  9. Remove the VTC oil control solenoid valve (See section on VTC Solenoid Valve).
  10. Support the engine with a jack and wood block under the oil pan. Ground cable and upper bracket removal hnda_trk_crv_grnd_cbl_uppr_brckt_rem.gif

  11. Remove the ground cable (1), and remove the upper bracket (2). Side engine mount bracket removal hnda_trk_crv_side_eng_mount_brckt_rem.gif

  12. Remove the side engine mount bracket. Timing chain cover removal hnda_trk_crv_timng_chain_cov_rem.gif

  13. Remove the timing chain cover bolts both from the front to the block and from the bottom to the oil pan.
  14. Remove the timing chain cover.
  15. Loosely install the crankshaft pulley. Compress the timing chain auto-tensioner hnda_trk_crv_compr_tim_chain_auto_tensnr.gif

  16. Turn the crankshaft counterclockwise to compress the auto-tensioner. Lock the timing chain auto-tensioner hnda_trk_crv_lock_tim_chain_auto_tensnr.gif

  17. Align the holes on the lock (1) and the auto tensioner (2), and then insert a 0.06 inch (1.5 mm) diameter pin (3) into the holes.
  18. Turn the crankshaft clockwise to secure the pin. Removal of the timing chain auto-tensioner hnda_trk_crv_rem_tim_chain_auto_tensnr.gif

  19. Remove the auto-tensioner. Removal of the timing chain guide B hnda_trk_crv_rem_tim_chain_guide.gif

  20. Remove the cam chain guide B. Removal of the timing chain guide A hnda_trk_crv_rem_tim_chain_guidea.gif

  21. Remove the cam chain guide A (1) and tensioner arm (2).
  22. Remove the cam chain.
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Oct 11, 2010 | 2002 Honda CR-V

1 Answer

Replaced multi port injectors,new timeing chain


Ensure the battery cable are not damaged and are tightly connected. Sometimes the cable ends become loose due to corrosion and wear thin.
Also try replacing the Mass Air Flow Sensor, it's the switch looking thing, to the right of the air filter box; I think it runs about $6-$10s. Good luck.

Dec 23, 2009 | 2000 GMC Jimmy

1 Answer

How to replace water pump


1. Drain coolant from engine.
2. Remove water pump drain plug. It is located on the front of the block just above the A/C compressor and about 2 o'clock of the crankshaft pulley.
3. Place a floor jack under engine (be sure to use a piece of wood in between jack and oil pan). Remove the right side engine mounting, mounting bracket and nuts.
4. Remove the drive belts and idler pulley bracket.
5. Remove the two black covers on the front of the engine. The one towards the radiator will have the water pump behind it and the one towards the thermo barrier will have the timing chain tenioner behind it.
6. Push in the tensioner sleeve, apply a stopper pin so it does not return ( a paper clip will work ).
7. Remove the tensioner (2 - 10mm bolts )
8. Remove the 3 water pump bolts.
9. Turn the crankshaft pulley approximately 20 degrees backwards to put slack in the chain to give clearance for the water pump.
10. Install the two M8 bolts into the threaded holes in the water pump (the upper hole and the lower hole)
11. Tighten the M8 bolts by turning half turn alternately until the water pump becomes loose. Lift up water pump and remove it. Make sure you move the timing chain away from the pump to remove it. Do not worry about engine timing. It will not effect it at all. The water pump is not part of timing the engine, nor will the chain losse contact with the crankshaft gear.
12. Make sure to use two new "O" rings on the water pump.
13. Install water pump and tighten bolts (63.4 - 85.1 inch pounds)
14. Return the crankshaft pulley to its original position by turning it 20 degrees forward.
15. Install timing chain tensioner, then remove the stopper pin ( paper clip)
16. Place sealer on the black covers and reinstall.
17. Reinstall engine mounting.
18. Reinstall drive belts.
19. Fill with new coolant.
20. Start engine and check for leaks. (Engine will be noise at first until the tensioner fills with engine oil. This is normal.)

Dec 10, 2009 | 1996 Nissan Maxima

1 Answer

How to change oil pump in 4.7


Here you go:

1. Remove the oil pan and pick-up tube.

2. Remove the timing chain cover.

3. Remove timing chain and tensioners.

4. Remove the four (4) bolts, timing chain tensioner and oil pump.

5. Position the oil pump on the crankshaft and install two (2) mounting bolts.

6. Position the primary timing chain tensioner and install the two (2) remaining bolts.

7. Tighten the pump and tensioner retaining bolts to 21 ft lbs in the sequence shown in attached photo.

8. Install the secondary timing chain tensioners, chains, cover, pick-up tube, and oil pan with new gasket.

See the photo below. Hope this helped and best wishes.

bd3b588.jpg

Jul 31, 2009 | 2000 Dodge Durango

3 Answers

2002 dodge intrepid starting issue new water pump,new timing chain,new belts, good spart, valves are good Can it be a crankshaft sensor?


dear friend-if you are positive that all the repairs were carried out with great care,that the timing is right,and you got spark and fuel,all the valves close propely,then it should start,if the sensor was ok before you stripped the engine why should it be faulty now.

Jun 29, 2009 | 2000 Dodge Intrepid

1 Answer

Mazda Premacy Timing Belt Change


Sorry for the severe delay.
I am personally going back to answer your unanswered question.
I do not know if you still need the answer, but I am going to answer it in case you still do.


The Front Oil Seal must be replaced when the Timing Belt/Chain is replaced. It is located behind the Crankshaft Pulley on the Crankshaft.

Nov 14, 2008 | 2000 Mazda MPV

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