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For the Toyota sports 800, which also has hydraulic tappets in an aluminum case, it is possible to go oversize using a different lifter, or sleeve the lifter bore. Either is a workable solution.
Fortunately, they rarely wear out the bore, tappet face failure is more common.
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From: "Keith Murphy via groups.io" <Keithddl527@...>
Date: 10/8/22 08:01 (GMT+09:00)
Subject: Re: [ArcaneAutos] Lockheed H
Like attempts to put hydraulic lifters in air cooled VW cases, if the lifter bores wear more then 0.002” - the hydraulic lifters make noise.
On the original air cooled blocks with solid lifters, if the bored are worn you loose oil pressure like crazy - it’s exactly the same on the Jowett - excessive wear in the lifter bores, causes low oil pressure, lifters will knock.
VW guys are aware of this wear, they have the lifter bores bushed with bronze bushings, but that technology is aimed at VW lifter bore sizes and case spacing, so custom work would be needed on the Jowett.
I have Jowett, so I have thought about this issue, going to solid oversize lifters and reaming the case is but one option - of several - all a matter of $ vs originality.
On Oct 7, 2022, at 8:37 AM, Tom Rymes <tom@...> wrote:
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