I believe the one with the angled fitting and the shorter bolts is from a
TR4 (or possibly 4A). The overall shape of the housing is also slightly
different, mostly near the tubes for the bolts. But, it works fine. The
6-cyl TRs take a completely different housing.
There went another point at concours <g>
OTOH, I think the factory listed the later casting as a valid supercession
to the earlier one, so perhaps it would be OK.
Randall
> I bought a thermostat housing on Ebay. I went to change out the
> thermostat housing today and discovered that the new housing was different
> from the old one (which is all corroded away and frozen up). The new one
> differs in the following ways: Where the hold down bolts go in is
> about 3/8
> inch shorter than the other. Where the temperature sending unit goes in is
> at an angle where the other is straight.
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