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Re: 88 M3 Running Hot (archive)

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Posted by CFL on May 03, 2000 at 15:18:03:

In Reply to: 88 M3 Running Hot posted by Chris Schrimsher on May 03, 2000 at 12:17:13:

: ========
: -Remove the auxiliary fan and have it tested. I assume this can be done, right? Replace if necessary.
: -Flush radiator while it is out.
: -Remove and test thermostat while radiator is out. Replace if necessary.
: -Take a closer look at wires running from thermostat to make sure they are not brittle and broken.
: -Flush entire cooling system.

As far as your concern, the temp guage is for oil and you measured water (coolant), so no problemo.

I'd go ahead and replace the coolant reservoir cap as sometimes it causes the coolant to overflow unnecessarily if it isn't working properly. Cheap fix.

Good idea on testing the thermostat, it costs almost $100 for a new one. While you have the radiator out have them blow compressed air through it to get rid of the dirt/bugs that might be stuck to it.

Also a good idea is to check the wires to the aux fan switch as they get brittle and from the factory they are too short and sometimes break.
Good luck man.

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