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.

A: Hi there - I suspect you have a blown head ...

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・Save up to 30%

Get a quote

What others are asking

Q: My temperature will rise to hot then come back down hot comeback down in doing so the fan will come on really hard vibrating

Hi there. There are a number of things that can cause a vehicle to overheat. I suspect you have a low cooling system, but the following are the steps you should follow to accurately diagnose your cooling overheating issue. You...

Q: Fuel gauge is erratic and inaccurate

Hello. Based on the symptoms you are reporting, your supposition is correct. The sending unit is typically a variable resistance element (i.e., a potentiometer) that can be tested by the Mechanic with an ohmmeter. These units can physically bind. The...

Q: Shifter sticking in park

The shift interlock switch on the brake pedal will need to be checked to make sure it is making contact when you press on the brake pedal to release the shift lock. I recommend having a mechanic, like one from...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...