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Funky valve clearance 120-130

posted by  Bennie on  Sat Sep 25 07:55 CST 2004
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last visit: Wed Nov 28 03:03 CST 2007
[RELATED]

Yeah, I know I should always keep lifters etc matched, but hey, sometimes you just cannot:

I've got a B20 wich I put together with a used C-cam (has run aprox 5k miles in other engine), used lifters (have run aprox 10k miles on different cam en engine) and used pushrods (also yet other engine/lifters).

Started this engine up first time. I adjusted the valves while hot. Very silent valve train. Drove 10 miles. Loud nock. Valve clearance on cilinder 3, intake, about 1 mm. Not so good. Measured valve lift (wiped out lobe I fugured?) compared it with other cilinders. No measurable diference. Took out the pushrod to have a look at both ends/tips. All fine. Re-adjusted. Drove 20 miles. Same story. No dif in valve lift. Drove 50 miles. Same story. Again no dif in valve lift.

I'm stunned. What can possibly cause this? Is my lifter shortening somehow? Is my pushrod shrinking?

Thanks, ben
--
P131, '65, B20B+M47. P131, '69, B20E+AW71L+LSD. (www.tinustechniek.tk)






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