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Unread 05-16-2010, 02:17 PM   #4
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Name: jwbavalon
Title: United Newb
Status: Offline
Join Date: May 2009
Location: Richmond,Bc
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Your Ride: 1997 M3
E36 m3 s52 throttle body coolant hoses by-pass

Hi, the coolant in/out is to warm the throttle body to prevent icing. There is a magic temperature and it is not freezing where the moisture in the air , speed, etc all come together and freeze causing an icing condition preventing the throttle from operating correctly. Unless you are into racing where you want cold air, I would leave it in. Having said that, lots of owners in the warmer climates have no problems with it removed.

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