Vanos noise hopefully fixed - The Unofficial BMW M5 Messageboard (m5board.com)

lofstrom · 21st February 2001, 07:52

After asking a couple of times with the answear: "That is a normal sound", BMW finally admitted that the engine sometimes had a strange rattling noise at idle. They say that it was a chain tensioner in the Vanos system who needed adjustment. I'll pick up the car today....

------------------

Stefan
´99 M5 Imola Red

AndyMenard · 22nd February 2001, 21:42

Stefan,

I would be very interested to see IF this fixes the dreaded "dieseling" noise at idle???

Mine has had it since delivery. Of course, otherwise - the car is FANTASTIC!!! What a machine?!

Let us know how it went? also, what was involved in the fix? was it a complete teardown of the entire VANOS unit?? how many hours of work?..

TIA!

------------------
Andy

2000 Imola M5 / Black Nappa - Titanium Trim

KingM5 · 26th March 2006, 16:32

So what is the resolution to the diesel VANOS noise? Simply an adjustment?

HDClown · 26th March 2006, 16:53

A slight diesel noise will always be evident in the Vanos system. You'll never completely get rid of it. It shouldn't be really bad like an old diesel in horrible shape, but just noticeable.

If you get constant, heavy, and loud, diesel noise, you should get it checked out in my opinion. You may need one of the two 'fixes" available, or just an adjustment of some kind.

bayerischemotor · 26th March 2006, 17:22

Quote:

Originally Posted by HDClown

A slight diesel noise will always be evident in the Vanos system. You'll never completely get rid of it. It shouldn't be really bad like an old diesel in horrible shape, but just noticeable.

If you get constant, heavy, and loud, diesel noise, you should get it checked out in my opinion. You may need one of the two 'fixes" available, or just an adjustment of some kind.

What are the two "fixes"?

HDClown · 26th March 2006, 17:29

Quote:

Originally Posted by bayerischemotor

What are the two "fixes"?

Should be in here: Vanos noise and What to do about it

I can't get it to load up right now for some reason.

bmwdctr · 26th March 2006, 17:36

I don't know of two fixes, but there is a bulletin (TSB) on this issue. I performed the repair on a collegue's '00 M5 about 9 months ago. It was successfull in getting rid of the rattle. If your noise doesn't go away, post again here and I'll try and dig up the bulletin.

Actually, it seems enough people have this problem. I'll find it when I get to work tommorow and post along with part numbers, etc.

"They say that it was a chain tensioner in the Vanos system who needed adjustment."

I'm pretty sure that chain tensioner doesn't have an adjustment...

-D

bmwdctr · 26th March 2006, 17:38

Quote:

Originally Posted by HDClown

Should be in here: Vanos noise and What to do about it

I can't get it to load up right now for some reason.

Ok, no need for me to find the fix. It's all in the link above.

-D

Beamer_usa · 26th March 2006, 17:49

Like everyone else, I also have the rattling. The $tealer says it is normal! But then again my local $tealer is the worst, so I did not expect anything more

DavidS · 26th March 2006, 18:04

Lofstrom,

How´s your car doing?

David