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Discussion Starter · #1 ·
Hi All,

I installed a new rear muffler not long ago. Unfortunately, the chrome tip does not let all the condensed water leak out and there is always some around the perimeter where the chrome tip wraps around the edge of the tailpipe in a C-shape. As you can see in the picture the edge already started to rust. As I heard it's not very uncommon with these setups. Is there any known/proven solution for this? I'm wondering if some small drain holes on edge of the chrome tip from underneath would solve this?
Thanks.

926070
 

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Premium Member
2005, E46 Convertible, 330CI M Sport, Mystic Blue, 76k Miles
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218 Posts
I'd give it a blast with XCP Rust Blocker. Brilliant stuff.
 

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'02 330i 5-Speed
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5,691 Posts
I'd give it a blast with XCP Rust Blocker. Brilliant stuff.
Or POR-15. Pull the tips off, coat inside, leaving lip exposed, reinstall.

The rust needs to be removed and/or coated whether or not a drain hole is drilled.
 

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177 Posts
Discussion Starter · #4 ·
Thank you both. I'm wondering if after removing/passivating the rust some light coat of grease around the tip of the tailpipe would help in the long run. That seems to be the critical area.
 

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Premium Member
2005, E46 Convertible, 330CI M Sport, Mystic Blue, 76k Miles
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218 Posts
That's what we are advising. I use XCP on my Multistrada and ride in all weathers. Not a spot of rust anywhere.
 
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