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.

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?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. The motor is sucking a lot of air from the plastic valve cover

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: no acceleration when pushing the gas pedal down (even to the floor)

This may be related to a faulty mass air flow sensor or potentially a bad throttle position sensor. The mass air flow sensor monitors air as it enters the intake system allowing for the proper amount of fuel to be...

Q: The gasket is deteriorated in the intake manifold gasket

If the gasket does have to be replaced it is replaced as a "whole". There is no partial intake manifold gasket. Please note that the code you are writing in about, Diagnostic Trouble Code P0171, can set for many reasons...

Q: Engine misfires and check engine light is always on

It’s always a good idea to pull over and turn off your vehicle when the check engine light is blinking. A blinking check engine light usually means there is a severe misfire in one or more of the cylinders. Most...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...