Where do the valve cover gaskets leak? - The Unofficial BMW M5 Messageboard (m5board.com)

derck_mullin · 6th May 2007, 04:59

Guys,

My pax side valve cover is leaking from 2 or 3 of the bolts in the valve cover. Not sure if this is the gasket or if I should just pull the bolts and clean them off and maybe put some kind of sealant on them. Just wondering if this is the typical valve cover leak or something different different.

Thanks

Derck

Fuddy · 6th May 2007, 05:28

I had the same problem, If you're gonna open up the cover might as well just replace the gasket

EM5PWR · 6th May 2007, 05:38

It's probably the O ring

derck_mullin · 6th May 2007, 05:45

Was not sure about pulling the cover. I was actually just referring to pulling the bolts and maybe putting something on them. However, I'm not sure that will fix the problem. But the leaking is really minor and doesn't really bother me, so I'm not overly concerned.

Derck

EM5PWR · 6th May 2007, 05:51

Quote:

Originally Posted by derck_mullin

I was actually just referring to pulling the bolts and maybe putting something on them.
Derck

Just replace the O ring .

derck_mullin · 6th May 2007, 05:59

Fast,

Since I haven't been in there yet, is there an O-ring for each bolt? Also, do you have to pull the cover to replace them or do they come out with the bolts? It kinda looked like there might be something like that in there, but I wasn't sure.

Thanks Bro

Derck

razahyde · 6th May 2007, 17:12

the o rings come out once your remove the bolt. you can try this but i do not think it will work.

EM5PWR · 6th May 2007, 18:14

If the bolt is wet with oil then yes I would pull the bolt and replace the O ring and yes it does work.. Just remove the bolt and it will be clear and simple.

J Irwan · 15th June 2007, 22:06

any one know the torque on these bolts ?

There is 2 different kind.
The rest of the valve cover are nut cap (M6) which have 10NM or tightening torgue, but what about the front 3 of each of the valve cover.

The realoem call these colar screw, and I can't find information on tightening torque spec.

Mine is seeping a little bit of oil from the fornt corner or the passenger side (the one that has the "colar screw").

Regardz,

J Irwan

TobyM5 · 16th June 2007, 00:31

I recently did the rocker cover gaskets and tightened the bolts down to about 10NM, it doesn't have to be exact as the collared bolts will bottom out before you squash the gasket! Didn't replace the O rings and everything appears ok but in hindsight probably worth doing while you are there.

Given that you can change the bolts and O rings without removing the cover and inlet plenun box its worth trying the O rings before doing the complete gasket to save the strip down.