Is there a leak in the thermostat housing?

Is there a leak in the thermostat housing?

It’s where the thermostat housing is bolted to the block, and apparently isn’t uncommon. The leak isn’t that bad – mechanic said the system isn’t showing any pressure loss, but there is definitely a leak (fluid running down over the transmission housing). He reckons it’s been there for a while.

Where is the coolant leak on my Alloytec?

I’ve got a minor coolant leak at the back of the block on my VE with an Alloytec. It’s where the thermostat housing is bolted to the block, and apparently isn’t uncommon. The leak isn’t that bad – mechanic said the system isn’t showing any pressure loss, but there is definitely a leak (fluid running down over the transmission housing).

Where is the coolant leak on my Holden VE?

I’ve got a minor coolant leak at the back of the block on my VE with an Alloytec. It’s where the thermostat housing is bolted to the block, and apparently isn’t uncommon.

Why did my V8 thermostat housing fail at 61, 200?

The housing failed at 61,200 and brought the issue to VWoA because the dealership refused to replace it WHILE I had warranty. In the end, VWoA covered the repair. Breaking V8 hearts & dreams! – 500+ whp build thread.

What is causing coolant to leak from the thermostat housing?

A damaged thermostat housing will leak engine coolant when the engine is up to operating temperature. The leak could originate from a crack in the housing, or it could come from a broken seal between the housing and the engine .

Can a bad thermostat cause a leak?

Also a bad thermostat will not cause a radiator or an overflow tank to start leaking. If one of those two parts are leaking and the leak is not obvious to the eye I would recommend having a technician perform a cooling system pressure test to determine where your leak is located.

What causes a thermostat to leak?

Most of the time when the thermostat housing is leaking it’s caused by dirt or debris that may not have been fully cleaned out when it was replaced. This will cause the gasket to not seal correctly.

What is a thermostat housing leak?

The thermostat gasket is most likely what is causing the leak. The gaskets overtime become hard and lose the ability to seal the coolant passing by the thermostat. The replacement of the thermostat and gasket is the most prevalent fix. It could also be a crack in the plastic structure of the thermostat housing which is causing the leak.