Skip the auto shop - Our mechanics make house calls

Q: Bad thermostat causing radiator leak.

asked by on

My radiator has a severe radiator leak. I suspect it is at the overflow reservoir and is being caused by a bad thermostat.

A: Just to be informative the radiator and the...

Just to be informative the radiator and the overflow tank are two separate parts that both store coolant and if one is leaking the other is not leaking. 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. This test pressurizes the cooling system without the engine running making leaks more easily noticeable to the technician. Once the leak is found I would recommend having it repaired as soon as possible in order to prevent engine damage due to overheating.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Brakes not working

If there is not enough engine vacuum then the brake assist will not work. A leaking vacuum hose needs to be replaced as soon as possible. Once that is replaced, the brakes should start working again. If there is still...

Q: Why is my car running hot?

Hi there, thank you for asking about your 2000 Dodge Grand Caravan. In most cases, the symptoms you're describing are related to a problem with your radiator thermostat. The thermostat is supposed to open the radiator to flow coolant into...

Q: I have an 2006 H-3 3.5 /oil pan gasket leaking what is in volved to change out

There are many steps to replace the oil pan seal. The labor book time calls for 4.0 hours work. Your vehicle may be different if you have 4x4. The steering gear needs to be removed and sub frame along with...

Related articles

How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...