Q: Are there lines that run from the spark plugs with o rings in them to keep oil out ?

asked by on

My car is at the shop they changed the spark plugs and the O2 sensor in front of the Catalytic converter. they said the lines from the spark plugs may need to be blown out as there are O-rings in them to keep oil out but there seems to be some oil in those lines

My car has 150000 miles.
My car has a manual transmission.

There are no ’lines’ that connect the spark plugs to any source of oil. However, there are o-rings placed inside the valve cover along with the valve cover gaskets that are intended to prevent oil from reaching the spark plugs. If these o-rings have failed, this can cause the engine to misfire. The only way to resolve this issue is to remove the valve cover and replace the o-rings. Consider YourMechanic for this service as it can be done from your home or office.

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. Are there lines that run from the spark plugs with o rings in them to keep oil out ?

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: Intake valve control solenoid

Hello - these 2 components mount on each cylinder head, and are partially visible at the "nose" (accessory belt end) of the engine. They use engine oil pressure to vary cam timing relative to the static cam/crankshaft timing relationship. Here...

Q: Car chokes, shakes, and shuts down

The symptoms you describe lead me to believe that your Subaru is experiencing electrical issues. It is possible that the computer has a bad connection or that it is possibly starting to fail. To be 100% certain, I would enlist...

Q: Car is making a speed related sound over 20mph almost like something is dragging or rubbing. 2008 Subaru Outback

Hi there - quite likely, this is a wheel bearing noise. Your own diagnostics actually narrow it to this "speed-related, but not while shifting (accelerating)" - well done! The bearing might not make noise while suspended - because it isn't...

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...