Skip the auto shop - Our mechanics make house calls

Q: My car keeps blowing oil sending units

asked by on

My car keeps blowing oil sending units we have had four replaced by a certified mechanic we just replaced the water pump because antifreeze was mixing with the oil the car runs great no problems it does not run hot or anything it just keeps blowing the oil sending units

My car has 130000 miles.
My car has an automatic transmission.

Hi there - I suspect you have a blown head gasket. Having coolant in the oil is a classic blown head gasket symptom, and having very high oil pressure means combustion pressure is being leaked into the oil passages. This pressurizes the oil pressure sending unit upwards of 150 to 200 psi (as opposed to being pressurized from the oil pump at 5 to 100 psi), overwhelming the oil pressure sending unit. I would recommend having your vehicle inspected by a mobile, professional mechanic, such as one from YourMechanic, to confirm this diagnosis and to address your pressure problem.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Engine oil pressure warning light on

The engine oil pressure light is the to warn the driver when there is not enough oil pressure. This light usually comes on when the oil is far below the needed pressure to properly lubricate the engine. The oil level...

Q: Cranks wont start

Hello. Your engine may be suffering from low compression because of worn piston rings, a broken rod, a valve(s) stuck in place, or a warped cylinder head/block. I suggest that you purchase a used engine or take the engine machine...

Q: Intake Manifold Gasket Replacement

Hi there. On your particular vehicle the intake manifold gasket replacement service would include replacing the lower intake manifold gasket, both valve cover gaskets, the intake plenum gasket, and thermostat housing gasket. It would also include new engine coolant and...

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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.