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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Posted on Jan 02, 2017

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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

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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.

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1 Answer

My 1991 honda civic dual point injection the iddle runs fine but when suddenly I accelerate the motor there is a sudden exasperation or what lokks like is going to stall and then the motor picks power all...


If your Honda is naturally aspirated/carbureted, then your only problem is the fact that the diaphragm that squirts gas into the venturis is not operating. Maybe just need to replace said diaphragm or maybe just an adjustment to make it squirt sooner is all it may need. This initial gasoline squirt is what keeps the engine from dieing when you stomp the throttle. Understood?

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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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Could be coil or ignition module starting to fail

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