Question about 1991 Chevrolet C1500

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Timing i have a 1991 c1500 pickup and i just changed the cams and headers and i lined up the timing chain sproket and camshaft sproket. i also set the distributer to #1 and i also adjusted my valves but my truck still wont hold the idle. it will start but will die if i let the gas off. could it be my valve settings?

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Have you checked your initial timing? Have you checked your fuel pressure at Idle? Have you changed your fuel filter? How was the idle before you changed the camshaft and lifters? What steps did you use to adjust hydraulic liters, did you turn them down 3/4 to 1 full turn after you set them? Maybe you have too large of a camshaft? Maybe you have a vacum leak?

Posted on Aug 01, 2008

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Timing camshaft


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Matching the sprokets pionts with the camshaft levels


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

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Align the crankshaft pulley mark with the 0 mark of timing case.
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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)
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Set the Crankshaft key in 12 'o Align yellow timing chain mark
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How do i set camshafts on 1999 duvil northstar


Remove camshaft covrs
Remove front cover
Remove or fully retract all three timing chain tensioners
Remove oil pump
Primary and secondary chain guides should remain in place. Rotate crankshaft until sprocket drive key is at about 1 o'clock position.
Set crankshaft and intermediate shaft sprockets into primary drive chain with their timing marks asjacent to each other.
Install crankshaft and intermediate sprockets over their respective shafts. Rotating crankshaft as necessary to engage crankshaft key in sprocket without changing the timing mark relationship.
Install Flywheel Holder Tool (J-39411) to lock crankshaft in position. Install intermediate shaft sprocket retaining bolt and torque to specifications.
Route secondary chain for left cylinder head over inner row of intermediate shaft teeth.
Route secondary drive chain over chain guide, and install exhaust cam sprocket to chain so camshaft drive pin engages the sprocket notch marked "LE" (Left Exhaust).
There dhould be no slack in the lower section of the chain, and the camshaft drive pin must be perpendicular (90 degrees) to the cylinder head surface.
Install the intake camshaft sprocket into the chain so the sprocket notch marked "LI" (Left Intake) engages camshaft drive pin, while drive pin remains perpendicular to the head face. Minor adjustments can be made to camshaft position to get pin to engage by using a wrench on the hex cast into the camshaft.
Install sprocket retainer bolts and torque to specification.
Repet steps as above to install the right secondary chain to the right camshafts. The right camshaft sprockets are marked "RE" and "RI". In addition, the RE sprocket must contain the camshaft position sensor pickup.

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Where us my 1996 chevy v6 C1500 pickup timing chain located. I need the area and schematics; as i dont know where to start /


the timing chain on the 4.3 is on the front of the engine. you will need to remove the water pump and the crank pulley to access the timing chain cover. You can see the cover if you look behind and above the crank pulley. the cover will be held on by about 15-20 bolts.

make sure you line up the timing mark on the cam gear with the timing mark on the crank gear. there will be a dot on each. when the are lined up the dot on the crank pulley will be at 12 oclock and the dot on the cam gear will be at six oclock.

you will need a puller to remove the crank pulley and the crank gear. Other than that its just nuts and bolts.

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2 Answers

How to install timing chain


Rather than getting into a long winded write up....just go to your local auto parts store and purchase a vehicle specific repair manual. It'll contain the specific directions you'll need to perform the job.

Its very important to make sure you get it properly timed before you re-assemble. PAY PARTICULAR ATTENTION to the section telling you how to line up the timing marks on the crankshaft gear and the camshaft gear. Also, take time to closely inspect the gear teeth for any signs of wear / damage. This is the perfect time to replace them if needed.

It's also important to make sure you've cleaned all gasket mating surfaces thoroughly so as to prevent oil leaks.

This isn't a particularly difficult job, but it can be tedious. Don't get discouraged if the first time you put the chain on the timing marks have moved and no longer lineup. Odds are the camshaft, not the crankshaft will move out of alignment.

Persevere and it'll all work out.

Good luck!

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1 Answer

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I need to find the magnet that goes on the cam sproket. When we go to purchase the timing chain kit there is no magnet that is what is missing on my car?


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Need to replace timing chain on 2005 cavalier


I'm doing this myself, and there are some annoyances. Yes, a service manual is good, however, I consulted 2 manuals and got two different answers. Here is the real deal for the 1996 2.2 vin 4 cavalier.

Remove the right tire and platic sheilds. Remove the tensioner pully, (2 bolts).

Remove the harmonic balencer on the crank shaft, 3 bolts first then the center.

Use a pull hammer with correct thread to pull off the "crankshaft thing" on the end of the crank shaft. Be sure to pull it off evenly. I had to find a bolt with the same threads, cut that off, and tap a fitting for my **** hammer. It's on there good.

Remove 7 (8mm) bolts from around the chain cover. Remove the 2 (10mm) bolts from under the cover. Those two studs also have to come out with a small inner tourqe socket. These are very very easy to strip, be careful. The cover is now free.

It is sealed on tight. There are a couple good places to get a bite on the rear facing edge. You will also have to work from the top and bottom to get it free. It pulls strait out, it is positioned by pins. Be patient, that cover will break.

There is silicon that seals the bottom of the cover. Clean that all off with a scraper and wire brush. Pull off and clean where the gasket seats all around the cover. Clean the cover. Replace the gasket and the outer oil seal that goes around the crank shaft. The only way to get that seal out is to break it. Press the new one in with a vice, do it evenly and slowly.

I've found a good method to get the cam shaft sproket off.... There are 3 slots and a hole. Rotate the cam sproket clockwise till you get the hole to about 9o'clock. Put drill bit or short piece of hard metal (something that won't bend) in that hole and apply some pressure while you rotate another 10 degrees or so. The bit will drop into a hole. Now rotate counter-clockwise and the bit will bind the sproket so you can remove the bolt. Nice huh? I get it unbound by putting a screwdriver between teeth and prying against the crank shaft. Use your imagination.

The timing **** is retarded. And I still havn't found a deffinate answer for everything. The crank shaft makes two rotations for every one that the cam makes. The first crank shaft rotation is the compression stroke, the second is the power stroke. I don't know how to tell the difference.

To get the sprokets aligned, re-install the cam sproket, don't worry about getting it tight. Rotate it clockwise until the hole in the sproket lines up with the ear on the chain tensioner. Now, bind the gear right in that spot and remove it. Now, take that "crankshaft thingy" and push it on by hand as far as you can. Notice the key, and dot on one of teeth. Put the bolts partially in the thingy and rotate it by using a bar or screwdriver between the bolts. Move that sproket until the dot on the tooth lines up with the ear on the chain adjustor. The key will point directly up. Good job. Tap that thingy off the shaft now.

Compress the chain adjustor and put a pin through it. With the cam sproket removed, put the chain on it. Work the chain onto the crankshaft sproket. Slide the cam sproket onto the camshaft. Easier said than done, but it is possible. If you are having a hell of time, use a mirror and check that you are lining it up properly with the pin/key in the crankshaft. I found that leaving a little slack at the top, as opposed to the bottom helps. FYI, when i say little, i mean it. There is very very little slack, but the chain does buckle slightly.

Remember me saying that I have no idea how to tell between power and compression stroke. Now you will hate me. To get mine right, I had to tighten the cam sproket then replace my spark plugs and attempt to start to start the car. I guessed mine right the first time and it ran fine. However, if it ran rough or not at all. I would have had to remove the cam sproket again, remove the chain and rotate the crankshaft sproket one full turn.

When you put this all back together, use plenty of slicon on the bottom of the chain cover. Re-assembly is a snap, or at least is was for me.


Jul 28, 2008 | 1998 Chevrolet Cavalier

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