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

asked by on October 03, 2016

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.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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


Experienced Mechanic?

Earn up to $65/hr

What others are asking

Fuel injector misfiring

Hi there. This is a common problem with this vehicle. These vehicles often lack proficient injector functioning. A solution for this would be to have a certified mechanic replace the number six injector. Also a certified mechanic will test the...

Truck cuts off when stopping

Hello. Stalling at stops can be caused by many things. A few common causes are: faulty idle air control valve vacuum leak fuel or engine management issue The most common of these is a failed idle air...

If I change one valve cover and gasket do I need to do the other?

You do not have to change both valve cover gaskets at the same time. If you have an engine oil leak that is coming from both valve covers then it would be recommended that you have both valve cover gaskets...

VDC & SLIP LIGHTS ON

Hello. The ABS and traction control / VSC fuses and relays would be the ones to check. There may just be one main ABS relay that powers all of the systems. U1000 and U1001 are codes indicating that a computer...

Clunking noises driving at low speeds or over bumps

A clunking noise when hitting bumps can be caused by worn out struts, worn strut mounts, sway bar bushings, steering linkage being worn, or loose components. It would be best to have a certified mechanic actually diagnose the noise. These...

Hi i have an 09 kia rio and my check engine light is on and the motor shakes when idling and when going around 40 mph. What could

Hello, thank you for writing in. The check engine light is designed to stay on constantly when there is an issue. You should start by having the vehicle scanned for diagnostic troubleshooting codes. These are codes meant to help the...

2007 Pontiac g6 p0304.

working

cylinder 3 and 4 misfire

Hi there. Check the spark plugs to see if they have burn spots on them. Switch them out with cylinders that are firing. If the other cylinders do not fire now, then the spark plugs need replaced. If the same...

Coolant boils, not sure if overheating.

Hello. It does sound like a thermostat issue. If the thermostat is not opening as it should then this will occur. It also sounds like the radiator cap may not be holding pressure. I would typically test the thermostat and...

Related articles

Symptoms of a Bad or Failing Expansion Valve (Orifice Tube)
Common signs include the AC system working worse than usual, frost coming from the vents, or the AC compressor constantly running.
How to Replace a High Pressure Safety Valve
High pressure safety valves help the car engine run smoothly. Oil filter housings can burst if high pressure relief valves are stuck closed.
How to Replace a Vacuum Brake Booster Check Valve
Brakes are assisted by the vacuum brake booster check valve that fails when the brake pedal is hard to press, feels spongy, or does not work at all.