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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