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E36 (1991 - 1999)
The E36 chassis 3-Series BMW was a huge hit among driving enthusiasts from the first moment the car hit the pavement. The E36 won numerous awards over the years it was produced and is still a favorite of many BMW enthusiasts to this day! -- View the E36 Wiki |
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#1
07-03-2011, 03:10 AM
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M50 engine noise
I have had a noise issue for several years and which is getting progressively worse as you might expect.
Nothing when cold but when hot at low revs under light load what I can best describe a a dull knock. Under heavy load eg a fast start it does not exist! In any event the noise goes away at higher revs. With a stethoscope it seems to be from the timing chain area but it is not what I would regard as chain noise. Various dealers have listened but no ideas except to disconnect Vanos which I did with no effect. I thought about oil viscosity change with temperature perhaps related to chain tension but this is spring loaded! What about hydraulic tappets? but location does not stack up I intend to remove the cam cover to have a look but don't expect to see anything amiss. There are no performance or any other issues. Any thoughts or suggestions would be appreciated 
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#2
07-03-2011, 07:40 AM
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Does disconnecting the Vanos actually stop the parts from rotating? I don't think so.
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#3
07-03-2011, 08:44 AM
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Nope, it will continue to rattle and make noise until the seals and bearing are replaced, plugged in or not.
__________________
-Alan  Member #2 of the Boston Green Mafia BMW-CCA #457574 1995 BG M3 2000 TiAg 4.4l X5 -I do the things today that others won't do, so I will have the things tomorrow that other won't have....
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#4
07-03-2011, 02:51 PM
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__________________
 Quote:
 Mona B.
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