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      11-18-2012, 06:05 PM   #1
jester77
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330i N52 - rattle when under load...

I've noticed a rattle / clunking that seems to be coming from the centre console (or something underneath) when the engine is under load i.e. accelerating quite hard through 2-3000rpm. I've heard it worst when doing a quick-ish hill start, so I guess it is torque related.

Have tried to search for the issue and seems there are a few potential causes:

1) DISA flaps chattering
2) Exhaust rattle (exhaust is standard except for a BMW Performance back box)
3) Engine mounts
4) Something loose inside the centre console

Any thoughts?

Last edited by jester77; 11-18-2012 at 06:45 PM.
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      11-30-2012, 06:06 PM   #2
jester77
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For anyone interested, the issue was a couple of loose bolts on the centre bearing - re-torqued, no noise, no issue!

Good job by K&M Autotechnic in Windsor - got the oil filter housing gasket replaced too.
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      11-30-2012, 06:20 PM   #3
GoRomeo
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      12-04-2012, 07:16 AM   #4
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what do you mean by centre bearing, do you mean propshaft related?
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      12-04-2012, 04:10 PM   #5
jester77
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Yep - propshaft centre bearing - hence the rattle sounded like it was coming from the centre console
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      12-04-2012, 04:42 PM   #6
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Did you get the noise when not enough revs, like pulling away in 2nd gear from a low speed (not stationary)? Think I have the same issue, sounds a bit like exhaust heat shield rattle.
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      12-04-2012, 06:32 PM   #7
jester77
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Started as just a rattle that seemed to occur when around 1,500rpm and not particularly under any load. Got worse after a while and seemed to then occur only when accelerating hard or doing something where there is significant load such as hill starts.

And yes, it does sound a little like an exhaust shield or similar is loose.

Last edited by jester77; 12-04-2012 at 06:33 PM. Reason: more info added
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