Hmmm--
Sounds like the same malady Peyote had last year (and the year before).
I too tried everything including a solid copper head gasket. I finally
surmised that the C/R was too high for the head to hold under maximum
load--and promptly had another head prepared. Bill Babcock will get to
test that one on the track. I never had a leak problem with the old set-up
while running in the shop or on a warm-up lap during a race. It was only
while climbing a hill (at Laguna) while under full throttle that it would
give up and spew. I hope it has been fixed. I also know it will drive
you bats (or to drink). Luck!
-----Original Message-----
From: Jack W Drews <vinttr4@geneseo.net>
To: fot@autox.team.net <fot@autox.team.net>
Date: Monday, May 24, 1999 5:13 PM
Subject: blocks and heads
>I prepared a TR4 engine and did all the "right" things. After we had run
>it a number of times in the shop, we found water in the oil. Disassembly
>revealed that the leaking was occurring between the water jacket
>cavities and the lifter gallery. We had set the liner protrusion at .003
>and had used a solid copper head gasket.
>
>I thought with that protrusion and the copper gasket, this problem would
>not occur. This is a repeat of an earlier problem that I had with
>another engine. I'm slowly coming to the conclusion that this is an area
>of the blocks that is prone to leakage. I don't quite know what to do
>about it, since if we have the block decked, then we have to machine the
>liners too, and machining these small amounts are operations that are
>pretty challenging to automotive machine shops (like, I haven't found
>anybody that will touch it).
>
>We solved the problem by going to a conventional head gasket, modified
>to not protrude into the combustion chamber. We gave up some compression
>ratio but at least still have the flow.
>
>Anyone else having this problem?
>--
>uncle jack
>61 TR4 Racer -- fast car
>71 TR6 Street Car -- fun car
>
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