350i Dash oil light

[tcpc]

hello,

when my engine is very hot at idle
the oil light on the dash some times flickers the oil pressure is about 1bar , if i blip the throttle or when driving it all seems to be ok, i can get 3bar with rpm over 4800.

is it possable that a lumpy cam when idling could causing this to happen

does any one else have there oil light flicker on occation when the engine oil is hot


thank tony

P.s i never had this proplem before the new cam went in

>>> Edited by tcpc on Monday 5th May 23:29

[Pettsie]

What is your idle speed? Maybe it needs to be set a little higher now you have a lumpy cam?

[tcpc]

idle is about 1200rpm but does drop to 1000 when it is very hot

[jmorgan]

Sounds a tad fast for idle but at that speed the oil light shoudn't come on?

[tcpc]

when the idle dorps to 1000 rpm that is when the light flicker but not all the time just some times


tony

what i did notice is when i put a new oil pump and gears in the oil pump gasket looked i little thicker then the old one, would this have any bearing on the oil pressure at idle

>> Edited by tcpc on Monday 5th May 22:36

[danny hoffman]

I suppose the first thing to check would be the pressure switch for the oil light - but if it worked before then it would be a bit of a coincedence if it failed at the same time as you did the pump work.

Maybe some dirt got in while you had things in bits - and thats affecting it. I think the light is supposed to come on at 5-7psi, but it's too early in the morning to convert that to BAR!

[350matt]

Sounds like the pressure switch has gotten a bit tired, retire it and fit new they're about 6-7q quid from any motor factor.

Matt

[tcpc]

yes it could be

thanks tony

[tcpc]

would the thickness off the oil pump gasket that fits to the oil pump housing, have any difference to the idle pressure off hot oil from the oil pump


tony

[danny hoffman]

I wouldn't have thought so - those pump gears shift a lot of oil. Are you sure the original wasn't just compressed.

[tcpc]

very possible,
i thnk i am just grasping at straws,
but
what i was thinking is the gap between the bottom off the pump gears and the face off the oil pump, was bigger than it should be

tony