Valves/ Id and adjustment - Team Camaro Tech
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post #1 of 4 (permalink) Old Sep 13th, 05, 08:08 PM Thread Starter
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Valves/ Id and adjustment

I had a small tick in the motor and had a friend who is a "So called" mechanic look at it. He tightened the rocker arms down and got rid of the tick. But know the car runs like s**t and the vacum gauge bounces like crazy.
I think he threw the valves all out of whack..I have a 1963-65 327 . I am not sure if this has hydraulic or mechanical lifters...Any way to know without tearing into it?

Can someone give me a little advice on where to start to get it back to correct setting? I know the valve lash will need to be reset but Im not real clear on how do go about it...Especially not knowing what type of lifters are inside...
What is a good method to get the car back to normal?
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post #2 of 4 (permalink) Old Sep 13th, 05, 09:19 PM
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Re: Valves/ Id and adjustment

First of all, do not run it any more until you figure out what the problem is. If it is a mechanical cam, and he adjusted it too tight, it can hold a valve open and burn the valve. Take off one of the valve covers and turn the engine over until one of the valves starts to open, it does not matter which one. Mark the pushrod somehow so you can tell if it moves up or down. then let the engine sit for a few hours and see if the pushrod has moved down any. If it has, it is a hydraulic cam. A hydraulic lifter will slowly bleed down from valve spring pressure, a solid lifter will not. If the pushrod does not move down any, its probably a solid cam and you need to put some "lash" back in the valve train. If you do not feel comfortable doing this, find a "real" mechanic that knows how to properly adjust valves and let him look at it. Anyone that does this regularly should easily be able to tell you if it is a solid cam, or hydraulic. If it is a solid cam, you will have to guess at the adjustment unless you take the cam out to find a number.
Ift would help if you tell us exactly where you are located, someone might be able to recommend a good mechanic in your area.
Hope this helps,

Bill Koustenis
Advanced Automotive Machine
Waldorf Md
1971 Chevelle "Heavy Chevy" original owner

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post #3 of 4 (permalink) Old Jan 7th, 06, 09:28 PM
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Re: Valves/ Id and adjustment

What is a good guess for setting valve lash,clearance, on solid lifters if you do not have cam spec. and really don't want to pull the cam for a number.

Thanks, Jim
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post #4 of 4 (permalink) Old Jan 7th, 06, 09:32 PM
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Re: Valves/ Id and adjustment

Another thought to help your id... if you remove a couple pushrods, you should be able to shine a flashlight down on hole while looking through the other. Hydraulic lifters have a fairly obvious "clip" inside the top edge that holds the 2 peices together, the clip would appear to square off the round inside of the top of the lifter. Solids have no such clip, the inside of the top is perfectly round.

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