2009 Volvo C70 Q&A

2009 Volvo C70 Question: there is a suction through oil cap. when it is on the engine makes a high pitch.

when the cap is off the sound stops and there is a suction at the opening from hole where oil goes. -
Answer 1
The suction is normal. It sounds like the seal in the oil cap is bad. Usually you can replace the O-ring. If you can't just order a new oil cap, shouldn't be more than 10 bucks. -
Answer 2
Engine breather is stopped up! Pcv system cant pull in fresh air through it. -