Re: E36 M3 Supercharged Overheating

[mrigoli@xxxxxxxxxxxxxxxx (Mario Rigoli)]

Not uncommon with supercharged 95 M3s but not difficult to
cure.  I run 1/3 antifreeze, one bottle water wetter then distilled
water.  Bleeding the system properly is critical.  Turn on the
heater and rev the warmed up motor to around 2k so that water is
streaming from the little hole in the neck of the radiator cap back
to the resevoir.  Fill to the proper lever in this state.

My car can now run the track all day in the 100+ degree Arizona heat.

Mario


>>Date: Fri, 23 Oct 1998 08:07:26 -0400
>>From: "Steve Graalman" <steve.graalman@domain.elided>
>>Subject: E36 M3 Supercharged Overheating
>>
>>Would anyone care to offer their thoughts on what my problem could be.
>>
>>The Problem: After 4-6 Laps on Summit Point Raceway,  the car overheats and
>>boils over very suddenly. The temperature gauge reads normal then suddenly
>>it is pegged.  I do not see a gradual overheating, just a binary normal to
>>hot.  It has never overheated on the street even when driven very
>>aggressively. There are no leaks in the cooling system.  A hydrocarbon
>>sniffer measured only 8 PPM in the coolant, so it appears the head gasket is
>>fine. The car is a 95 M3 with the ERT Vortech Supercharger installed.  I
>>believe the supercharge is providing 6 lbs. of boost. I have the bigger
>>throttle body and free flowing exhaust.  I have never seen any mixing of oil
>>and water, water vapor at start up, or water puddles under the car.  I am
>>frustrated!  Any and all advice would be welcomed!
>>
>>Thanks,
>>Steve

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