Skip the auto shop - Our mechanics make house calls

Q: Leaking oil into the intake and PCV and catalytic converter

asked by on

Leaking oil into intake PCV and catalytic converter

My car has 150000 miles.

You would need to have the entire crankcase ventilation system checked and serviced first to make sure all the PCV valves are clean and working correctly, or if excessive oil will be consumed and get in the intake. The turbo would need to be inspected to see if it’s an oil seal leaking excessively and getting oil into the intake system. Once these are checked and repaired as needed, then have the intake system cleaned with combustion cleaner and then check engine blowby to see if it is excessive and causing crankcase overpressure conditions from compression leaking past the piston rings. If you need help having this checked, a professional from YourMechanic can come to your car’s location to pinpoint the oil leak and run the necessary tests to have this repaired properly.

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: Battery good, maybe starter.

Hi there, I am assuming the engine is not turning over when the start/stop button is being depressed. This would possibly indicate a problem in the CAS (Car Access System). In your BMW the key transmits a code to the...

Q: Water leaking from car

Hello. If you have a coolant leak from your car that you cannot easily see, then the system needs to be pressure tested. I would typically use a cooling system pressure tester to pressurize the system to see if the...

Q: Serpentine belt coming off

Hello. The oil that is spitting out from the front main seal is leaking onto the serpentine belt, and belt pulleys. This is causing the serpentine belt to slip off. The front main seal will need to be replaced with...

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...
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...
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.