Why does my thermostat housing keep leaking?

While these materials are designed to last for a long time, exposure to extreme temperatures and movement in the coolant rubber hose may cause your thermostat to eventually spring a leak. Coolant will also leak out of the system once the housing is cracked, warped, or damaged in any way.

Why is my coolant leaking so fast?

1: There’s a Hole in the Radiator. Corrosion within the radiator is one of the leading reasons that coolant leaks. As the tubes get older and weaker, you may get sediment or debris inside that causes a leak. The sealing gasket between the tank and the radiator can also wear out, and that could lead to a leak.

How do you stop a thermostat housing leak?

1 Answer

1. Drain your coolant system.
2. Remove the two clamps from the hoses on the housing.
3. Remove the two hoses from the housing.
4. Remove the two bolts holding the housing.
5. Remove the housing.
6. Remove the thermostat.
7. Clean the housing and the head at the mating surface.
8. Install a new thermostat (see note below).

How do you seal a thermostat housing leak?

Place a new thermostat gasket on the engine block. Place the thermostat housing over the block and align the screw holes. Apply some anti-seize lubricant to the mounting bolt threads. Screw the mounting bolts in by hand, then tighten them firmly with a socket, extension and wrench.

Why is my car leaking coolant from the bottom?

An antifreeze leak can occur through a hole in your radiator. Corrosion of your radiator tubes or damage because of stones or debris can create a leak. Over time, your hoses get hard and brittle, and as a result, coolant can sometimes leak out where they join with your water pump, heater core, radiator or engine.

Do you put gasket sealer on thermostat housing?

Since the thermostat in your car has a regular gasket, you can use RTV or not, at your pleasure. If you’ve had seepage issues in the past, it’s almost a given you’d use it. Even if you haven’t, it’s not going to hurt anything to use it now. If you do use it, only put a thin coat on it, covering both sides evenly.