99 prizm timing chain replacement

[galaxyal04605]

just replaced the timing chain, tensioner, camshaft sprockets, crankshaft sprockets and guides on a 1999 prizm, 1.8 liter. Now i have a problem with #4 exhaust valve tapping like the lord of the dance. I check the timing points about a half dozen times, measure all the intake and exhaust valves clearances and everything is within spec's. I followed the Haynes repair manual word for word, even know some parts were not that clear. compression test shows only a 5 psi drop in #4 cylinder, compared to the other cylinders.

Has someone got some info that they can tell me about, maybe someone had the same problem, or is this just a valve problem or could i have just mess-up setting the timing?

[rhandwor]

I would check the hydraulic lifter try soaking it in fresh motor oil and pump by hand.

[galaxyal04605]

these lifters are of the non-hydraulic type, just little cups.

[galaxyal]

i guess i can't get to much help with this problem, but i am going to try replacing the rod bearings first, before i remove the head, still open for idea's, after this weekend i will post another blod.

[rhandwor]

If their solid lifters sometimes they take shims or can be adjusted. Lay push rod on a flat table and roll if its bent you will observe. Check length against one the other ones.

[galaxyal04605]

not sure when they changed their system, but this type of engine uses a dual over head camshaft, no push rods, no shims, or adjustments for the lifters, replacement of the cups only, by size. This is a basic system, has a camshaft for the exhaust and one for the intake.

[bentcustom]

Comming from someone who actually know what your engine looks like.........

The lifters are shims. If you remove one and look under it it has a number on it. Check clearance between the cam lobe and lifter (with a feeler gauge) to see if it is in spec. if not you will need to get the right size lifter/shim.

Also check and make sure the timing chain is not loose. I have seen it a few times because for some reason it seems the tensioners don't like to take out the slack on their own. I have had to loosen the two 10mm nuts that hold in the tensioners and pull it out (you will hear it click), then tighten it again. Just be carefull not to make it too tight. It makes a racket though when it is loose.

Ben