Skip the auto shop - Our mechanics make house calls

Q: The motor is sucking a lot of air from the plastic valve cover

asked by on

The motor is sucking a lot of air from the plastic valve cover. With stopped car and engine running pull out the oil dipstick and the engine sucked a lot of air through the hole making gurgling sounds. At this time the engine shaken and it seemed it was going to stop. While driving and stop at any light the RPM reaches 2K and in some cases 3K. When the car is started at mornings, It throttles more than the regular RPM and then sets to normal. I would like to know what is the function of the gasket and the cover of the valves and if it is normal the engine sucks some air through them. There are no visible oil leaks. Searched info about and got a lot of cases with bad PCV valves and also the IAC valve.
My car has a manual transmission.

A: Hi, thanks for writing in. It is not normal...

Hi, thanks for writing in. It is not normal for that much air to be sucked in. Here is an article about the valve cover gasket.

Here at YourMechanic, we can have a technician come to your home or office to inspect and diagnose this issue for you, and make or suggest the necessary repairs, such as a PCV replacement.

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: Cooling system issue - 1999 Chevrolet C3500

The lower intake manifold gasket you replaced seals both coolant, and oil passages. It is possible that coolant (under higher pressure) is leaking into an oil passage. It is also possible you have a bad head gasket - leaking coolant...

Q: My 2009 Nissan Altima won't start. I press the brakes and and push the start button and the inside of the car comes on.

Hi there: Although it's possible that a faulty brake switch is the reason why your Altima won't start, it's also possible that the starter, starter relay, ignition relay or ignition module on your 2009 Nissan is damaged or faulty. The...

Q: Ignition Problem

Hello, thank you for writing in. To better understand this strange issue, it helps to know that the engine receives most of its power from the alternator once the engine has started. When the field to the alternator is not...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
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...