Brad :
One possibility is a clogged radiator, causing the water pump to pull a
vacuum on the inlet side and suck air through the seal. Not likely, but ...
Another possibility is air trapped in the system. I'm not sure about a
TR4A, but on a TR6 the thermostat housing is higher than the radiator cap,
making it impossible to pour the system full without the engine running and
the thermostat open.
Best test I know is to remove the fan belt, remove the thermostat housing,
and fill with water (or water/antifreeze if it's already in there) so you
can see the level in the opening on the head. Start the engine and let it
idle for a minute while you watch the water. If you see bubbles coming up,
they're from a compression leak somewhere, most likely the head gasket
(although a cracked head can do the same thing).
Randall
Brad Kahler wrote :
>
> How about it, any ideas on what else to look for besides a blown head
> gasket?
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