Reply to "Lifter Bore Clearance"

panteradougMember

If you are looking to reduce the clearances to reduce the amount of oil pumped to the lifters, with solid lifters, yes. The oil passage is reduced in the lifter itself. With hydraulic lifters, no.

You must maintain a minimum wall to lifter clearance or else it will seize in it's bore.

I'm not sure if the hydraulic lifters will still operate properly if you sleeve the bores?

You are reducing the quantity of oil to them and it might not be enough to operated them properly or fill them completely?

On the other hand, you only do this modification to rev the engine over 7,000 rpm and if you were going to do that, then you wouldn't use hydraulic lifters anyway.

I can't think of any other reason to worry about the lifter bore clearances.

6/11/149:31 AM

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