Drain Oil on Pressure Switch Change

[Ken in Oklahoma]

It's interesting to me that the only airhead pressure switches that I've seen leaking have always leaked where the electrical tab exits through the plastic. I'm guessing that the plastic, though it's hard, has shrunk away from the tab--probably shrinking from out gassing. The switch on my R100/7 drove me crazy trying to find the leak. I was (in retrospect) only really looking around the base where it goes into the block.

You'd have thought BMW would have specified a switch that wouldn't leak after only a couple decades or so.



Ken

[stone]

Thanks for the part number.

[SteveD]

The oem switch isn't too expensive.

Once they start to leak the oil level will drop from MAX to MIN on the dipstick over 200kms. Much of that goes onto the rear tyre. DAMHIK.

[barryh]

Agree they are not worth subsituting on cost grounds if a BMW dealer is nearby.
If not here's another potential alternative together with a bunch of cross references


intermotor part no 50570 .

http://www.elcome.co.uk/smpe_ecat/ViewP ... =28&i=5685