I am not quite sure what you mean.

But what I know is there are several different valve seals that are designed for 11/32" valve stems, the odd size of the B18 valves, to fit various non-Volvo engines that will fit inside a stock Volvo valve spring.

Our machinist does not always use the same valve seal, a problem I will now correct, and he would custom machine the stock B18 valve guides to fit whatever 11/32" valve seals he had laying around. And until recently, that has not been a problem, but on the last B18 head, he used valve seals that were just a little too large on the outer diameter and the valve springs chewed them up.

So I will get together with him and come up with a specific valve seal that we will always use in the future. This will also allow us to have the valve guides custom made by his supplier with the end correctly machined to accept our selected valve seal.

So if your valve guides have not been already custom machined to fit a valve seal, I should be able to recommend a valve seal in the next day or so.
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Eric

Hi Performance Automotive Service (formerly OVO or Old Volvos Only)

Torrance, CA 90502