Anyone know where the vent is on the rear diff? - The Unofficial BMW M5 Messageboard (m5board.com)

nightkrawler · 10th March 2009, 02:15

all the seals on my diff are leaking which i find rather odd. i was looking for the vent hole today but for the life of me i cant find it. i want to make sure the vent is not clogged. does anyone know where it is located on the diff?

Valkman · 10th March 2009, 23:45

On the rear of the differential, about 1 o'clock. It's a really small hole which might be hard to see unless you're under the car. No tubes etc.

nightkrawler · 11th March 2009, 01:19

where exactly? lol, i looked everywhere. can you post a pic please?

CSBM5 · 11th March 2009, 04:15

I already shipped off my old diff, but I'm pretty sure that if you are looking at the rear cover, you'll find the vent at the top right of the cover. I'll see if any pictures I have show it.

Chuck

CSBM5 · 11th March 2009, 04:19

Ok, found a pic showing what I was thinking about. I'm pretty sure that the vent is the small round feature between the two bolts on the top right.

Chuck

nightkrawler · 11th March 2009, 11:48

of course it would be in a spot where the subframe is right up against the cover, lol. thanks, i wouldn't have found it there.

felstmiester · 11th March 2009, 12:14

I have fitted an extra vent on my diff as my seals kept blowing. I drilled and tapped a small union in the middle of the filler plug and vented a small pipe up high. Not sure if the oem one is effective enough.