Question about 1991 Honda Civic

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Sheared camshaft sprocket key, sprocket turns freely.

I have a 1991 honda civic hatchback 1.5 engine that stopped running suddenly. The camshaft sprocket sheared from the camshaft and the camshaft nolonger turns (obviously). My questions are: 1. Is there any way the valves are not bent? 2. What could have caused this? The timing belt looks good and the previous owner was a mechanic who changed the belt himself. Any ideas??

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One psooibility to this is that there was insufficient oil going to the cam bearings and the camshaft seized. The oil galleries in the head could be plugged therefore not supplying oil to the cam bearings.
There is a posibility that the valves are not bent but you would have to check them carefully. that could be checked out when thw head is machined because if the cam seized you'll have to take the head off and have it serviced.( cam bearing seats machined and oil galleries cleared. Hope this helps you out

Posted on Jan 23, 2009

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I require a circuit diagram how to set my polo vivo 1.4 16v timing chain


THESE ARE THE TOOLS U NEED TO HAVE AND PROCEDURE!!GOOD LUCK AND BEWARE THE TIMING..REPLACE BOTH CHAIN AND TENTIONER!!!!!!

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Special tools and workshop equipment required
t Dial gauge -VAS 6079-
t Puller -T10094 A-
t Dial gauge adapter -T10170-
t Camshaft clamp -T10171-
t Counterhold tool -T10172-
t Locking pin -T40011-
t Spark plug spanner -3122 B-
t Counterhold tool -3415-
t Torque wrench (5...50 Nm) -V.A.G 1331-
Procedure
- Remove valve timing housing > Chapter.
- To turn crankshaft, reinstall bearing bush, crankshaft pulley -2- and crankshaft bolt -3- and securely tighten crankshaft bolt (use counterhold 3415).
- Remove spark plug from No. 1 cylinder. Use puller -T10094 A- and spark plug wrench 3122 B.
- Screw dial gauge adapter -T10170- into spark plug hole to stop.
- Screw dial gauge -VAS 6079- and extension -T10170/1- in to stop and lock in position with lock nut -arrow-.
- Turn crankshaft in direction of engine rotation, to TDC No. 1 cylinder. Note position of small needle on dial gauge.
- Then turn crankshaft back 45° opposite direction of engine rotation.
- Press tensioning guide rail -1- in direction of arrow and lock piston with locking pin -T40011-.
- Mark direction of rotation of timing chain -3- using felt-tip marker.
- Remove bolts -2- and remove camshaft sprocket -1- with timing chain -3-. Counterhold using counterhold tool -T10172-.
- Renew bolts -2-. Tighten bolt -2- to 50 Nm (use counterhold -T10172-).
- Turn inlet and exhaust camshafts until camshaft clamp -T10171- can be pushed into holes in camshaft to stop.
Locking pins -arrows 1- must engage in holes -arrows 2-. Inscription "TOP"-arrow 3- must be readable from above.
Note
Camshafts must not be pushed axially whilst turning.
- Install a M6 bolt -arrow- hand-tight (do not tighten) to secure camshaft clamp -T10171-.
- Remove camshaft sprocket bolts. It is absolutely necessary to use counterhold tool -T10172- for this.
Note
Camshaft clamp -T10171- must not be used as a counterhold tool.
- Remove one camshaft sprocket.
- Place timing chain over camshaft sprockets, observing chain direction of rotation, and install camshaft sprocket again.
- Tighten camshaft bolts until camshaft sprockets can still just be turned on camshafts.
- Tension timing chain by removing locking pin -T40011-.
- Turn crankshaft in engine direction of rotation to TDC No. 1 cylinder. Permissible deviation from TDC No. 1 cylinder: ±0.01 mm.
Note
If crankshaft is turned more than 0.01 mm past TDC, then turn crankshaft back 45° against engine direction of rotation. Then turn crankshaft in direction of engine rotation to TDC No. 1 cylinder.
- Hold camshaft sprockets -1- and -4- in this position with counterhold -T10172- then tighten bolts -2- to 50 Nm.
Note
Crankshaft must not move and timing chain -3- must remain tensioned on both sides when tightening camshaft bolts.
- Remove camshaft clamp -T10171-.
- Turn crankshaft two rotations in direction of engine rotation to TDC No. 1 cylinder. Permissible deviation from TDC No. 1 cylinder: ±0.01 mm.
- Insert camshaft clamp -T10171- to stop in camshaft openings.
If camshaft clamp -T10171- cannot be fitted
- Repeat adjustment.
If camshaft clamp -T10171- can be fitted
- Remove camshaft clamp -T10171-, hold camshaft sprockets with counterhold tool -T10172- and tighten bolts -2- a 1/4 turn (90°) further with a rigid wrench.
Note
Camshaft sprockets must not move on camshaft whilst tightening.
- Turn crankshaft two rotations again, in engine direction of rotation, to TDC No. 1 cylinder. Permissible deviation from TDC No. 1 cylinder: ±0.01 mm.
- Insert camshaft clamp -T10171- to stop in camshaft openings.
If camshaft clamp -T10171- cannot be fitted
- Repeat adjustment.
Further assembly is basically the reverse of the dismantling procedure. In the process, note the following:
t Installing valve timing housing > Chapter.
t Installing poly V-belt > Chapter.
t Renew oil seals for camshaft sealing cover and oil them before fitting.

Mar 06, 2015 | 2010 Volkswagen Polo 1.4

1 Answer

My service engine light comes on after I have been driving for 20 or 30 minutes goes through cycle again after stopping and turn key off 93 Honda civic hatchback DX


If the car shuts down after the service engine lights on, possible problem is the igniter on your ignition coil. You have to replace the igniter. I had the same problem before with my esi 93 and honda car shop fixed it by replacing the said part. It is better to have the code scanned first. If it gives you 1 long flash followed by 5 short flashes, definitely it is the igniter.

May 24, 2014 | 1993 Honda Civic 4 Door

1 Answer

1995 honda civic Ex 5speed manual trans


The timing belt is wrapped around the crankshaft and camshaft sprockets in the engine assembly.

Apr 06, 2013 | 1995 Honda Civic

2 Answers

Timing belt broke and i need to set the timing


The pistons, valves and cylinder walls typically take a beating when the timing belt breaks. If yours didn't, I'm amazed.

But you can TRY this:
For most OHV engines with a timing belt there is usually a hole in the camshaft sprocket that can align with a hole in the head. If there are two camshafts, each sprocket typically has the same arrangement. Look closely, if there is no hole, there will be a mark of some kind to indicate #1 Top Dead Center.
Make certain that the crankshaft and the camshaft(s) are all at #1 TDC, if there are holes in the sprocket(s), push an appropriately sized drill bit through the hole, into the corresponding hole in the head to hold the camshaft timing, then replace the belt, making certain that any idler pulleys or tension adjuster pulleys are out of the way. After you've put the new belt on, Put the idler pulleys and tension adjusters back into their appropriate place then remove whatever you used to hold the pulleys in place.
Most of the time a valve will "kiss" a piston when the timing belt breaks. That causes immediate and fatal damage to the engine requiring (at minimum) a complete engine rebuild. Sometimes valve seats, pistons, cylinder walls and other components are destroyed when the piston and valve collide.

Feb 27, 2011 | 1992 Honda Accord

1 Answer

How to reset timeing on a 1991 chevy lumina 3.1


Timing is not resettable by the user, as the computer controls this based on knock or no knock conditions which will advance or ****** ignition timing for optimum performance.

The valve timing is something that is set when installing the timing chain:

2.5L, 2.8L and 3.1L Engines Fig. 4: Timing chain and sprocket removal - 2.5L engine 88003ga8.gif
Fig. 5: Timing chain and sprocket removal - 1996 3.1L engine shown 88003gb5.gif
Fig. 6: You must use a suitable puller to remove the crankshaft sprocket 88003gb6.gif
  1. Disconnect the negative battery cable.
  2. Remove the timing chain front cover assembly, as outlined earlier in this section.
  3. Rotate the crankshaft until the timing marks on the crankshaft sprocket and camshaft sprocket locator hole are aligned to the marks on the engine block or timing chain dampener. This is the No. 1 piston at TDC (No. 4 firing position).
  4. Unfasten the camshaft sprocket retaining bolt/screw, then remove the camshaft sprocket and the timing chain. NOTE: If the camshaft sprocket does not come off easily, a light blow on the lower edge of the sprocket with a rubber mallet should loosen the sprocket.
  5. Remove the crankshaft sprocket using tool J 23444-A or equivalent puller.
  6. If necessary, remove the timing chain dampener retaining bolts, then remove the dampener. To install:
  7. Install the crankshaft sprocket using tool J 38612 until it the sprocket is fully seated on the flange of the crankshaft nose. Apply a coat of Molykote® or equivalent, to the sprocket thrust surface.
  8. Hold the camshaft sprocket with the chain hanging down, and align the marks on the camshaft and crankshaft sprockets.
  9. If removed, install the timing chain damper to the engine block.
  10. Align the dowel in the camshaft with the dowel hole in the camshaft sprocket. Install the camshaft sprocket and chain, use the camshaft sprocket bolts to draw the sprocket on to the camshaft. Tighten the sprocket bolts to 18 ft. lbs. (25 Nm).
  11. Lubricate the timing chain with engine oil.
  12. Install the front cover assembly, as outlined earlier in this section.
  13. Connect the negative battery cable.

Feb 12, 2011 | 1991 Chevrolet Lumina

2 Answers

1999 honda crv timing belt replace ment instructions and pictures


PATH: Engine Mechanical > Engine Mechanical Components > Timing Belt & Sprockets > Removal & Installation Removal & Installation
  1. Disconnect the negative battery cable.
  2. Position crankshaft so that No. 1 piston is at Top Dead Center (TDC).
  3. Remove the splash guard.
  4. If equipped, remove the cruise control actuator.
  5. Loosen and remove the power steering pump drive belt.
  6. Remove the two bolts that attach the top power steering hose to the power steering pump. Cover and seal the hose and the open port of the pump.
  7. Clamp shut the power steering reservoir return hose, remove it from the return line, and remove the power steering pump and reservoir as an assembly.
  8. Remove the remaining accessory drive belts. Refer to Section 1 for specific details.
  9. Place a piece of wood between the oil pan and the jack, support the engine with a jack.
  10. Remove upper engine bracket.
  11. Remove the valve cover.
  12. Make sure the engine is at Top Dead Center (TDC) for No. 1 cylinder. The engine is at TDC for No. 1 cylinder when:
    • The white Top Dead Center (TDC) mark on the crankshaft pulley is aligned with the raised pointer.
    • The UP marks on both camshaft sprockets are at the topmost (12 O'clock) position.
    • The holes in the No. 1 exhaust and intake cam journals align with the holes in the camshaft. A 4.5 mm or 5/32inch drill bit or Allen key can be placed through the holes to prevent the cams from rotating while removing or installing the cam belt.
  13. Remove the crankshaft pulley. For details, see crankshaft pulley removal in this section.
  14. Remove the timing belt covers.
  15. Loosen the adjusting bolt 1/2-1 turn. Release the tension from the belt by pushing on the tensioner, then retighten the adjusting bolt.
  16. Remove the timing belt.
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To install:

  1. Be sure the timing marks are properly aligned.
  2. Install the timing belt around the crankshaft sprocket and then stuff a clean rag or paper towel between the belt and the sensor guard to hold the belt engaged with the sprocket teeth.
  3. Place the flat side of the belt clockwise around the top of the tensioner and then engage the toothed portion of the timing belt counterclockwise around the bottom of the water pump sprocket.
  4. Carefully pull the timing belt upward but do notmove the crankshaft. If the crankshaft moved, carefully realign the crankshaft timing belt sprocket with the TDC marks. Carefully engage the teeth of the timing belt onto the exhaust camshaft sprocket, but only install the belt about 1/3 of the way onto the sprocket.
  5. Grasp the timing belt on the toothed side and gently lift the belt enough to begin sliding it onto the intake camshaft sprocket.
  6. Once the belt has started to slide onto the intake camshaft sprocket, slide the belt equally onto both the intake and exhaust camshaft sprockets.
  7. Quickly loosen and then retighten the timing belt tensioner bolt.
  8. Remove the tools from the camshaft caps used for securing the camshafts, and remove the cloth used to keep the timing belt engaged in the crankshaft sprocket.
  9. Apply a clockwise load on the intake camshaft sprocket bolt to remove any slack between the intake camshaft sprocket, exhaust camshaft sprocket and the crankshaft timing belt sprocket, then loosen and retighten the timing belt tensioner adjusting bolt to allow tension to be applied to the belt.
  10. Install the crankshaft pulley sprocket/timing belt guide washer.
  11. Install the lower and upper timing covers.
  12. Install the crankshaft pulley and tighten the bolt to 130 ft. lbs. (177 Nm).

    WARNING

    If any binding is felt when adjusting the timing belt tension by turning the crankshaft, STOP turning the engine, because the pistons may be hitting the valves.

  13. Rotate the crankshaft about 5-6 times counterclockwise to seat the timing belt.
  14. Position the No. 1 piston to TDC.
  15. Locate and remove the rubber plug for the timing belt tensioner on the lower timing belt cover.
  16. Loosen the adjusting bolt 1/2 turn by
  17. Rotate the crankshaft counterclockwise 3 teeth on the camshaft pulley.
  18. Tighten the adjusting bolt to 40 ft. lbs. (54Nm).
  19. Retighten the crankshaft pulley bolt to 130 ft. lbs. (177 Nm).
  20. Install the valve cover.
  21. Install the engine mounting bracket, then remove the jack.
  22. If removed, install the cruise control actuator.
  23. Install the accessory drive belts.
  24. Install the splash guard.
  25. Connect the negative battery cable.
  26. Check the engine operation and road test.

WARNING

Never allow antifreeze, oil or solvents to come into with a timing belt. If this occurs immediately wash the solution from the timing belt. Also, never excessive bend or twist the timing belt; this can damage the belt so that its lifetime is severely shortened.
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Sep 15, 2010 | 1999 Honda CR-V

2 Answers

1991 Honda Civic DX starting problem


The Ignition Can Cause This Try Taking All The Keys Off Your Keyring And See If When You Use Strictly The Vehicle Key If It Still Does This.

Jan 04, 2009 | 1991 Honda Civic

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1990 Honda Civic DX


Could be coil or ignition module starting to fail

Oct 24, 2008 | 1990 Honda Civic

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