Q: Is my thermostat the problem or is it my oil pump? I've been researching but I don't know for sure.

asked by on

I got this truck from my brother over a year ago. Before I got it, I replaced the thermostat twice. It drove well all fluid levels were fine. Then back in July this year, my oil pressure gauge started going down when I'd stop then level off when I started to drive again. I checked the oil it was fine, I had a diagnostic ran on it nothing showed up. Well a couple of days ago the truck started to overheat. On my way back from AutoZone on Saturday, the truck started making a rattling sort of noise, and my temperature ran past the red. I barely got back to my apartment before it stalled out. I waited till it cooled down started it and parked it correctly. So what do you think? I'm not by any means familiar with what could be wrong, I've just researched and been asking questions, please help me out with some advice

My car has 177600 miles.
My car has an automatic transmission.

Hi there, thanks for writing in. The problem with oil pressure and overheating issues is that there are several individual components that may not be working correctly to cause these issues. My first guess would be that the thermostat on the radiator has failed, causing the accelerated overheating problem. However, the rattling noise also may indicate a problem with the water pump or radiator itself. The rattling noise may be coolant inside the oil, which is usually caused by a blown head gasket. The best bet for you is to contact one of our local mechanics to complete an engine is overheating inspection before you run out to buy any parts or to get quotes on repairs. This will allow the mechanic to determine the precise source of your problems and recommend the right corrective action.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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
  1. Home
  2. Questions
  3. Is my thermostat the problem or is it my oil pump? I've been researching but I don't know for sure.

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: Pretty sure oil pump went bad while driving and now seized up.

If you over-revved the motor due to the transmission staying in first gear and then the oil pressure dropped, then you either had a rod or crankshaft break and seize the motor. It sounds like you had a transmission malfunction...

Q: My car is vibrating - 2005 Jeep Liberty

Hello. If your vehicle is making noises I would start by trying to identify where the noise and vibration are coming from. Noise and vibration, even at low speeds, can be caused by many things not all of them transmission...

Q: I turned the key to start and it tries to start but won't. I turned the key to on and it is still trying to start.

It sounds like the ignition switch tumbler has broken inside. Remove the battery cable and try turning the key on and off several times. Hook up the battery cable again and recheck the starting situation. If the starter still wants...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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...