Quote:
Originally Posted by gtofreek
I think the clearance between the lifter, and the lifter bore could have something to do with it. The engine I'm dealing with now has less than .002", so not enough volume to keep it filled.
The oil band doesn't always have to be in the oil hole, just needs to be aligned at the critical time, when it's on the base circle.
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You were talking about Olds V8 engines here a day or 2 ago.
How the Lifter bores are set up to supply oil to the Hydr lifters and feed timing..
I have 2. 403's here & 1. Olds 455 block.
1 403 & 455 are bare blocks with cranks in them.
I will take a look today.
I recall they had an oblong. oil feed holes.
Much larger than Pontiac V8.
I saved a few sets if original of Pontiac 455 lifters circ 1971 just for future reference .