Skip the auto shop - Our mechanics make house calls

Q: Found oil leak when changing spark plugs

asked by on

I have owned my car for about four years now. When I went to do the routine maintenace yesterday - replacing the spark plugs, I found that all four spark plug sockets have oil leaks when I took out the boots. The plugs looked like they were in decent condition, and there was no gunk. The oil level seems fine. I'm wondering if this might be caused by a bad head gasket or valve cover. Would one of those cause this problem, and how much might it cost me to get it fixed?

A: Hi there. This is very common on your vehic...

Hi there. This is very common on your vehicle. This is caused by the valve cover gasket tube seals. These fail all of the time because they become brittle as the engine gets older. Once that occurs, they start to leak and allow oil to enter the tubes. I typically replace the gaskets and the coil boots along with the spark plugs so that I do not have to go into the same repair a second time. If you need to have this done, consider YourMechanic, as a certified mechanic can come to your home or office to inspect your oil leak. From there, they will be able to make the necessary repairs to have this issue resolved.

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

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Car burning coolant

Hi there. If your car has overheated, it may have caused your head gasket to warp. This warpage allows coolant to enter combustion chambers causing your vehicle to not efficiently cool. An external leak is not necessary for this blown...

Q: engine ok

Hello. This can be caused by a number of issues. I usually start by scanning the computer for codes to see if there are any engine misfires. A misfire will cause it to run like this and can be caused...

Q: Car is making a knocking noise when stopping. Other mechanics say it's motor. Some say it's the piston

Unfortunately, there is no way to tell without doing some more testing. The timing and small details about the noises you are hearing may make a huge difference in diagnosing the issue. Lifters will make more of a "clicking"...

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 to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
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...