Q: Pressure valve cover rings

asked by on

I am having issues with back pressure coming through the valve cover ring. It’s blowing oil back through the ring. Is this pressure good or bad, because I’m not sure. But I don’t know why it’s coming through the valve cover. I checked all the lines, and they aren’t clogged as far as I can see. And I don’t know what else to look for. My car runs good, but I didn’t take it on the freeway yet just in case it’s in bad shape. What are your suggestions and ideas on this?

The pressure you are observing is not a good thing. First off, check to see if the positive crankcase ventilation valve (PCV valve) is clogged up. If it is, then it should be replaced. Also check to see if the crankcase breather hoses are crimped, preventing crankcase gases to be vented through the PCV into the engine for combustion at appropriate times. If the piston rings are worn excessively, even a properly operating PCV system cannot handle these high levels of crankcase fumes. A certified professional from YourMechanic can inspect your vehicle, and replace your PCV valve if necessary.

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

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!
  1. Home
  2. Questions
  3. Pressure valve cover rings

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: Muffler smoke after doing repairs on the car

Most likely, the work you had done and the smoke are unrelated. Black exhaust smoke indicates a rich air fuel mixture and can be caused by problems like a leaking fuel injector or faulty engine sensor. White exhaust smoke indicates...

Q: Air conditioning is not cooling effectively during the heat of the day

Depending on the vehicle model and engine you may have a cooling fan not providing enough air flow across the radiator and condenser. This is most likely the cause of the a/c not blowing cold enough. The temperature should be...

Q: Car not running after throttle body with IAC valve replacement

Hi, thanks for writing in. I would recommend retracing your steps. You are definitely on the right track. It sounds like you did a good amount of work to your car, and it is likely that something may been skipped...

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...
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...
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...