I have inherited a Volvo that when the engine is running, and you pull the oil fill cap , or dip stick there is a suction. Is this normal??
2006-09-25 12:51:33 · 4 answers · asked by Nevin 1 in Cars & Transportation ➔ Maintenance & Repairs
Volvo, You say, There is a vacuum system on the engine. There is no pcv valve or breather element. The oil dipstick and oil cap are making noise when you remove them because you are releasing vacuum pressure from the engine. Yes it is normal. Just make sure that you don't drive without either in place or it gets messy under the hood.
2006-09-25 13:21:13 · answer #1 · answered by Tim P 1 · 0⤊ 0⤋
Sounds like you may need to change a "breather filter". This is the filter that cleans air going into the engine. This is one part of the PCV system, the PCV valve being another. A stopped breather filter will prevent filtered air from relieving that vacuum, resulting in the behavior you describe.
2006-09-25 13:02:01 · answer #2 · answered by Ren Hoek 5 · 0⤊ 0⤋
This depends on what type of engine you have. Some motors do have vaccumn for emission purposes. If the engine runs fine do worry about it. If it was a pcv valve it would run bad.
2006-09-25 12:57:33 · answer #3 · answered by coolblues 2 · 0⤊ 0⤋
I don't think that's normal. It may be a bad PCV valve. Check your vent tube as well. What kind of oil pressure does it have? Should be no more than 60 PSI. Good luck.
2006-09-25 13:04:30 · answer #4 · answered by jeff s 5 · 0⤊ 0⤋