Skip the auto shop - Our mechanics make house calls

Q: Air sucking into oil dipstick

asked by on

I lose oil a lot. Have back pressure through oil dipstick and oil cap. When I take the dipstick out or unscrew the cap, not much loss of power.

My car has 110000 miles.
My car has an automatic transmission.

Hi, thanks for writing in. If the crankcase is building up pressure that will not equalize, then you have a clogged crankcase ventilation system, such as the crankcase air filter may be bad. Have the PCV valve and air filter crankcase tube filter changed as required. Check to make sure there is no blockage in the PCV system and that the engine does not have oil sludge build up in the engine for lack of oil changes.

If you would like help, consider having an expert automotive technician from YourMechanic come to your home or office to inspect and diagnose this issue for you, and make or suggest any repairs as needed, such as replacing the PCV valve or crankcase vent filter.

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: Will a 5.7 hemi from a 2011 charger fit a 2002 ram 1500 quad cab that had a 4.7

Hi there. Unfortunately, this type of engine swap would most likely require some major fabrication with motor mounts, a new or reprogrammed ECU and other enhancements most likely to work correctly. Since we don't offer this type of service, it...

Q: No more engine oil 2005 Ford Mustang

Hello - If you have lost all the engine oil through the oil pan, there is no doubt broken internal engine damage. Most likely, this is a broken connecting rod or piston. Attempting to restart the engine would be difficult...

Q: Very fast idle

Hey there, thanks for writing in about your 2002 Dodge Caravan. Using the propane torch is indeed a good method to find vacuum leaks, but it is by no means the easiest method to use. It takes practice to...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
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.