[jkdata]

Hello everyone, my 323i se makes a mettalic tapping noise every time I go over speed bumps or just bumps in the road, starting to p**s me off all feedback appreciated. Jay

 

[andystone]

bushes?

 

[northants_guy]

Bushes, suspension components, is the exhaust properly mounted?

 

[DragonLogicX]

I would check the exhaust heat shield, and exhaust mountings first as they are probably the most common reasons for rattling

 

[fanger]

Particularly the gearbox-end exhaust hangar - very high fail item and does give a metallic tapping sort of noise on bumps.
New one about a tenner from the stealers.

Also, check the old toolbox in the boot lid for anything loose - a prime suspect!

 

[jkdata]

thanks I will have to get it up on some ramps and have a good look tomorrow, didnt even think of tools in boot lid, if bushes are they easy to replace? Jay

 

[fanger]

Fairly easy. There are good guides here if you search this forum.
Fit Powerflex bushes as they're better than stock and many folks here say they tighten up the ride and handling.
Check out this to determine which bushes you're after:

http://bmwfans.info/parts/catalog/E...rear_axle/rear_axle_support_wheel_suspension/

 

[jkdata]

Thanks eveyone cant look today something come up as always, and thanks for that Fanger.

 

[RobFM]

I have found the same problem... head under the car shows the heat shield is loose and resting on the exhaust. What do I do to fix back to the chassis?

 

[swaynie]

I had a issue like this for months and couldnt find the issue till yesturday and i found that the metal shield around the cat one of the wled broke and the shield was slapping against the exhaust

 

[fanger]

Use a penny washer (or something same size cut from tin can) to enlarge the coverage over the rotting heatshield bolt holes.