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oil pressure problem (archive)
[ Follow Ups ] [ 5-series (E34) Message Board ] [ Msg. Board FAQ ]
Posted by paul richardson on August 06, 2000 at 14:02:40:

My 1988 530i takes 10 seconds from start up for the oil
pressure light to go out, if the car has been left switched off overnight.
A pressure gauge has been used to confirm the pressure switch function is correct. A new oil filter and oil have been installed. Cold oil pressure is
4.5bar and hot is 1.5bar, both at idle. 2000rpm sees 5 bar.
I am at my wits end. Can anybody confirm if this engine has a non return valve in the oil system.
Could the pressure relief valve be jammed open letting oil drain back.
Or is this normal for this engine.
Help
Paul R


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