Thread: oil pressure switch - or not?

Pretty sure you've got a 200tdi (which I think is the same as the 300).
I've never done one on those engines but was looking at the 300tdi housing last night as I need to replace the temp sender o-ring.
Logically thinking, the only oil I could see coming out would be in the galleries and oil cooler lines above the pressure switch. Should be minimal (less than dropping an oil filter) I reckon but I could be wrong.

Personally I'd change it. Greatest risk of stuffing the job up would be cross threading or stripping the thread, so take your time, do it up all the way by hand first before just giving it a light nip followed by a quick run to check for leaks.

Take your dud one and its sealing washer, and suitable spanner with you just in case the new one suffers some infant mortality..

Steve

You wont lose any significant oil removing the oil pressure switch unless you start her up!
As mentioned be careful on not cross threading and just do it.

Having said all that the engine will hold pressure above the light on point until the sump is all but dry and the damage is done so it wont really save you from say a catastropic oil loss.
Similarly the rotor oil pump is pretty well bomb proof so shouldnt really fail, only thing that might happen and you would not be aware of it in 1000km is if the oil pressure relief spring failed and you lost oil pressure down into the sump bypassing the galleries... Im not even sure whether pressure would drop to the point the light would come on anyways???

Anyways it is an easy job to do - and if the dud oil switch failed totally it could start painting your engine bay in hot black stuff which would be far more work to clean up than doing the swap out...

Steve

overalls on...

now just gotta go hammer the new one in ...

Originally Posted by manic

overalls on...

now just gotta go hammer the new one in ...

Try a spanner Tangles!

Well that was brief.

The new switch I have has a 22mm hex, the one in there looks like a 26mm. Biggest spanner I have is a 24mm. Not gonna bother without the right spanner.

Here comes a holiday with frequent oil checks!

I might pick up a 26mm en-route tomorrow if I'm feeling lucky.

A 1" spanner fits snugly on mine, or if you were stuck a 27mm single hex wheel nut socket would do it.

Steve