Thread: Valve Cleaning?
View Single Post
      11-21-2012, 01:57 PM   #2
JDM NA2
Private
0
Rep
71
Posts

Drives: 09 335i e90 M-Sport
Join Date: Oct 2012
Location: CA

iTrader: (2)

It's called walnut shell blasting. Check out this link.

http://www.e90post.com/forums/showthread.php?t=732369