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Valve train geometry question help please !

After I adjusted the no 3 exhaust valve, only about =BD the lock nut threads were holding the adjusting screw. Most of the other adjustment screw lock nuts look OK. I have been doing this for years. Is this anything to worry about?

I think this is caused by the cylinder head being pushed out by the cylinder spacers.

Should I switch over to swivel adjusters?

Are they longer than the stock valve adjustment screws?

I would really like to keep using the stock adjustment screws. Are the adjustment screws on a Type II, II, or IV longer than the Type I adjustment screws? Maybe I could use one of those so the lock nut could use all of it=92s threads.

Reply to
Jim Ed
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Sounds like you need longer pushrods.

Max

Reply to
Max

It could be the adjusting screw is damaged/worn, or the end of the valve is damaged/worn, cam lobe getting messed up/going flat, wrong pushrod.....among other things. However, if your cylinders were spaced out too far due to shims under the barrels I would expect that to affect all four valves on that side of the engine, not just one....

I'd pop the valve cover off and remove the rocker shaft and have a close look at the valves and the ends of the adjuster screws....

Chris

Reply to
halatos

I think I will get an adjustable pushrod tool, measure and then order some 'cut to length' pushrods.

---------------------------------- ....only about =BD the lock nut

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Reply to
Jim Ed

I agree with what Chris has stated... only thing to add, if it were a cam lobe problem you'd have the same issue on the opposite side valve, so you can likely eliminate that as a possibility if it is that single valve... unless that pushrod is different than the others(pull the one next to it and compare the two) it's likely something else... make sure the nuts holding the rockers down are tight...

Reply to
Joey Tribiani

I'd rather drive it until it drops than have to diassemble and reassemble. It runs smooth and with plenty of power.

Reply to
Jim Ed

Jim, If you feel that popping off a valve cover and a set of rockers is disassembling, you need to go ahead and sell the car now... really...

Reply to
Joey Tribiani

Sorry I must have woke up on the wrong side of the ... .

I appreciate all of your help.

I will rest up and try it again.

Reply to
Jim Ed

It was the adjusting screws.

I think I will get some swivel feet adjusters from aircooled.net.

Reply to
Jim Ed

Simply adding lash caps or switching to swivelfoot adjusters will restore your adjustment range, but odds are the geometry won't be very good.

Reply to
Jim Ed

I also plan to replace the swivel feet about every three years.

Reply to
Jim Ed

..or every time you rev past 6000..... or rev up too quickly :)

Reply to
Jan Andersson

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