Is the sump pressurised?
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Scooby Regular
Joined: Mar 2004
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From: Midlands
Is the sump pressurised?
I have a mate who says that the rubber seal at the top of his dipstick is perished. He is concerned that oil will be forced up out of the dipstick.
I was under the impression that oil in the sump just drains back down there and is not under pressure. Am I right?
I was under the impression that oil in the sump just drains back down there and is not under pressure. Am I right?
Scooby Regular
Joined: Apr 1999
Posts: 4,410
Likes: 1
most cars have a crankcase breather to vent any pressure. there maybe a bit of blowby from the rings and the crank wizzing about will all create a bit of pressure. so yes it is possible to get oil blowing out the dipstick 
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