Q: There is a leak around the thermostat housing which resulted in decreasing water in the radiator

asked by on

There is a leak around the thermostat housing which resulted in decreasing water in the radiator

My car has 155000 miles.
My car has a manual transmission.

Hi there. First thing we need to determine is from where on the housing is the coolant leaking. If it is coming from the thermostat location in the housing, it could simply be a thermostat gasket/O-ring leaking. If the leak is coming from any of the hoses, the leaking hose and clamp will need to be replaced. However, if the leak is coming from where the housing is mounted, the housing and/or housing gasket has failed. A cooling system pressure test would uncover the leak location. Decreased coolant in the cooling system can result in overheating and possible engine damage. If you need to have this checked, a certified professional from YourMechanic can come to your car’s location to diagnose the leak and move forward with any repairs.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. There is a leak around the thermostat housing which resulted in decreasing water in the radiator

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Bad smell, probably antifreeze leaking

The smell of coolant or antifreeze is always concerning, especially with a car that has such low mileage as yours. Given the symptoms you are describing, the best thing you can do is have your vehicle serviced as soon as...

Q: Q: Car overheating and not starting.

If the engine has been overheating and got hot enough then you may have caused some serious engine damage causing the engine to no longer start. If it did not get too hot then these may be separate issues. When...

Q: Q: Oil in coolant

First, you have to determine if it is engine oil or transmission fluid. If you have an automatic transmission, then there is a heat exchanger in your radiator. Transmission fluid runs there in two hoses. If it cracks, you will...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.