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      01-01-2013, 01:40 PM   #12
exdos
Second Lieutenant
England
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Drives: Z3 M Coupe(S54) and Z4 M Coupe
Join Date: Apr 2008
Location: UK

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Quote:
Originally Posted by inTgr8r View Post
Next chance I get I'll lift the car & get some measurements for the front plate.
Excellent find!

I fitted a set of H&R E46 M3 ARBs a few months ago, and I made and fitted some 5.5mm thick steel shims between the front ARB bracket and the chassis, which I think should prevent chassis flex and metal fatigue causing tearing. I didn't want to weld the shims to the chassis for the same reason that you've mentioned (rust developing around the welding point), but now you've brought this method to everybody's attention I'll definitely use the epoxy glue to stick my shims to the chassis.

I've got a spare shim lying around, so I'll scan it on my photocopier and upload the image in this thread so it can act as a template for anyone who wants to strengthen the chassis.

When I was installing the rear ARB, I had a very good look at the rear subframe and chassis, with the idea of possibly reinforcing the points of attachment. I thought the construction looked fine with no obvious points of weakness, so I left alone.

Last edited by exdos; 01-02-2013 at 04:58 AM.. Reason: Typo
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