Replacing Timing Chain 96 (or so) Chevy S-10 2.2L

[dksob81]

I need some instruction on replacing the timing chain on a 2.2L engine.

[dksob81]

CORRECTION: This is a 2000 Chevy S-10 2.2L. I took the valve cover off and tore everything down and got the timing chain voer off, Now while doing some searching someone mentioned that when #1 Cylinder is at TDC the #4 Valves should be rocking, At TDC on compression stroke the #4 Exhuast valve starts to close and Intake starts to open. Someone also mentioed about at TDC on the intake stroke the holes on Crank and Cam gear should line up,. well at first I could not find the hole on the crank gear, it is very very small, but I found it this morning and it lines up.

The kid brang this to me to put a new timing chain on for him, I asked him how he knows it's the chain, and he told me that it just died on his brother and would not restart and he was talking to someone and they had the same problem on the same engine and it was the timing chain. Well the timing chain is intact and nothing broken.

I have absolutely no compression at all, I checked with the guage and nothing at all, but I already knew this because the engine spun FREELY, no sound of any type of compression. any thoughts or anyway I can check the timing to make sure it is right?

[MT-2500]

If on TDC compression stroke on No. 1 piston.
The valves should be closed on that cylinder.

And the valves on your opposite firing cylinder no. 4 should be rocking as one closing and one opening.

If that checks out the camshaft is timed right or the timing chain is set right.

Is all valves opening and closing when you crank it?
Any compression on other cylinders?
Do you have air pressure where you can hook up a air hose to each cylinder and check for air leakage.
A head gasket can/will cause compression leak or no compression between 2 cylinders.
Are the push rods tight where you can not spin them with your fingers?
MT

[dksob81]

Ok then the timing is not the problem everything there checks out.

No I would guess there isno COMPRESSION on any of the cylinders the engine just spins too freely, I did not check the other cylinder (only #1) with the compression guage. I do have an air compressor, i never thought to check for leak using compressed air into the cylinder with the valve shut (compression stroke) - that would have made diagnosing a blown head gasket alot easier. Anyways I was thinking last night that maybe it was a bad head gasket, so 2day after work I tore the head off, the gasket looks good, I think he may have had it replaced not so long ago before he had this problem, but I think I might have figured out what the problem was, the front head bolts (external bolts closest to the exhaust manifold) were loose, not finger loose but I did not have to break them loose and the internal bolts were tight. Do you think that could be the problem. Do you know the torque specs for the head bolts?

[MT-2500]

If the head bolts were lose enough they could do it.
Check you PM mail for torques specs.
Always use new head bolts when installing head.
I would also take the head to machine shop and have valves checked and the head checked for flatness and plain if it needs it.

When you get it back together check rocker arms and push rods for not being to tight.
The rocker arm or valves are not adjustable.
But if head is plained to much they may be to tight.
If head is plained a lot a head gasket shim may be required.

As you are installing it back together recheck compression and air pressure test all cylinders.

Good luck
MT

[dksob81]

I will do this. When I got off work today I decided to throw it back together and was cleaning the head up a lil while waiting for him to bring me the new head bolts, the part store didn't have them last night but they said they would have them in this morning, so while wainting for him to go get me the new head bolts I was cleaning the head and notice a chunk of the head was missing on the #3 cylinder a chunk was missing between the dome and one of the water jackets. So he is gonna run out to the salvage yard 2morow while I am at work and get a new head.

[dksob81]

Well I replaced the HEAD today along with new bolts and gasket and new intake manifold gasket, As soon as I got the head on and the valvetrain tightened up I checked for compression and the compression was good, It was actually harder to spin the engine by hand this time.....lol Well got enough of it together to see if she would start. Well, that didn't happen, Sounds alot better while cranking tho, checked compression on all cylinders, Cyl 1 and 2 I get between 120-150 psi., 3 about 40 psi. and 4 about 100 psi. humm cylinder number 3 isn't doing so well, pour a lil bit of oil in the spark plug hole and got the compression immediately went up to about 110 did the same on cylinder 4 and compression went up to about 10 psi.

So it looks like the ring are shot. I am going to pull the HEAD off tomorow to see if I can see anything obvious but I am positive the rings are the problem now.

[ericn1300]

how much would a used, low mileage, 2.2 cost? probably not a lot of demand out there to drive up the price.

[dksob81]

I don't know, he is gonna call around today and see, I don't think it will be that much these engines are very common in alot of GM Vehicles.