Oil filter with or without Anti-Drainback Valve?

In general, if the oil filter is mounted sideways or upside down then get it with drainback valve, otherwise, ie normal way up there is no need for a valve.

Nedavno Mrcheerful napisa:

And what is the normal way up? Here is my filter looking at it from the front of the car (from the left headlight):

that is the normal way, an anti drain valve would not help you, I don't think it would do any harm either, so use one by all means !! it is usually only needed on filters that would let the oil out when fitted, rather than your type where the oil cannot fall out, because the opening is at the top. back siphoning is not a problem on any engine I am aware of. the only engines that absolutely must have a valve that I have come across are ford v6 colognes, where the filter is on its side.

Nedavno Mrcheerful napisa:

I thought that anti-drain valve stops oil from draining down from the engine head, or from the valve area. Obviously I was wrong.

The reason I am asking this is because when the car is not started for a day or two, when I start it, oil light does not go off for a second or a bit more. If it was running in the morning, it will go off instantly if the engine is started at evening.

Characteristic of that engine? Worn oil pump? Lazy oil pressure switch?

It's not something I would be worrying about...

Chris

No problem. When you stop the engine, the bearings have enough oil in them to lubricate them until the oil pressure builds up, even if the filter has drained. Provided the oil light goes out in a few seconds rather than a few minutes, you'll be OK.

Steve

Nedavno shazzbat napisa:

OK, thank you.

Nedavno Chris Whelan napisa:

Reassuring, thank you.

BMW's engineers may not yet have been able to produce a front wheel drive system, but I am pretty sure they'll have been able to design an oil filter. So I'd suggest just going with what BMW suggest.

Ian