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Full Version: Coolant Going Down - Leak In Thermostat Area
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Colin T
I've had a closer look at the thermostat housing and using a sheet of kitchen paper to dab around to see which part is wet, it appears that the leak is at the base of the removable thermostat compartment, which I can also see that there are signs of gasket sealant around the joint area with the main thermostat housing unit.

Another job for me to do after xmas.

I'm hoping that this can fixed by dismantling and cleaning the thermostat housing joint surfaces and fitting a new thermostat seal / gasket?

I guess that there shouldn't be any need for gasket sealant compound when fitting a new seal?
artscot79
[quote name='Colin T' timestamp='1293207725' post='107652']
I've had a closer look at the thermostat housing and using a sheet of kitchen paper to dab around to see which part is wet, it appears that the leak is at the base of the removable thermostat compartment, which I can also see that there are signs of gasket sealant around the joint area with the main thermostat housing unit.

Another job for me to do after xmas.

I'm hoping that this can fixed by dismantling and cleaning the thermostat housing joint surfaces and fitting a new thermostat seal / gasket?

I guess that there shouldn't be any need for gasket sealant compound when fitting a new seal?
[/quote]

the housing has become brittle and will need replaced its a known issue
alz
you should be ok with a new thermostat and rubber seal, it sounds the thermostat as been changed in the past, using the old seal which is a No! No! allways use a new seal, the seal will come with a new thermostat. (dont get antifreeze) when changing it..
Colin T
With the engine cold, I undid the 3 screws from the thermostat cover and removed the old thermostat seal.

During which I found chunks of 'translucent squidgy sealant' on the joint faces of the thermostat chamber & thermostat cover!!

Quite a mess

Looked like the previous owner had used bathroom sealant!!

Cleaned the sealant from the thermostat cover and fitted new thermostat seal, fitted cover and topped up coolant.

Started engine and ran for about 15 minutes with the coolant reservoir top off, topping up with coolant as the air came out of the system and the coolant level settled to correct level.

Will now run the car for a few days to see if this has fixed the coolant leak.
Colin T
No more leaks - new thermostat seal has fixed this leak.

Seal cost about 1.80 from local Ford garage


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