<VV> Noisy lifters
patiomatt at aol.com
Tue Jun 24 13:40:15 EDT 2014
Hello, You may recall the saga of mine regarding the cracking pistons in my
140/turbo.It's back on the road again with new forged pistons, rebuilt heads and
clarks roller rockers.The bottom end has about 13k miles on it since rebuilt in
07 with"deep dimple" lifters, otto tb20 270 cam, american pi adjustable cam
gear. Custom length pushrods.Trouble is, I cannot get the "deep dimple" lifters
adjusted so that they are quiet. Sounds like an older 911, tappity tappity.This
has been a problem since 07.I have good oil pressure, 30 psi at idle. 40 at 3k.
Verified with multiple gauges.I have tried tried comp cams roller tip rockers as
well as stock rockers to no avail. I have followed every method of recommended
of adjustment. Static, running, 1/4 turn, 1/2, 1turn, shop manual etc.I suspect
the lifters just leak down to much while running so that there is always
lash.Any advice before I replace all lifters with new?If I do, sealed power?
others?Thank you, Jim Cuneo65 corsa 140/turbono
Are you sure you don't have a set of Rhodes lifters? They are designed to do that....for engine with large overlap cams.
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