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Old 05-11-2001, 04:02 PM
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Join Date: May 2001
Posts: 7
Hello y'all. I'm new to this board, and I must say I am impressed at the quality information being shared here.

Now, my 95 C280 has been running hot lately, with temperature rising above 110C on city driving and the aux fan not coming on. Usual temp range has been 80 - 90C under fairly mild Nor Cal conditions. Mechanic feels that my fan clutch is not engaging properly, and I am curious as to what is the function of a fan clutch. Also, is this an expensive job?
Edward Cho
Menlo Park, CA
1983 Porsche 944
1995 C280
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Old 05-11-2001, 04:59 PM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
The clutch fan should engage at 92-94C deg. The aux fans are supposed to come on at 107C deg. With the A/C on the aux fans should run at a lower speed that with engine heat.
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Old 05-11-2001, 06:07 PM
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Join Date: May 2001
Posts: 7
Thanks M.B.DOC for the useful info. Now, what does it mean when the fan clutch is not engaging at the proper temperature? What needs to be replaced to get the fan clutch to function properly? Do I need to change the fan clutch itself? I am a novice here, so please bear with me. Thanks.
Edward Cho
Menlo Park, CA
1983 Porsche 944
1995 C280
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Old 05-11-2001, 10:43 PM
oldsouth's Avatar
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Join Date: Feb 2001
Posts: 610
The fan clutch cannot be repaired. Look up a new vicious fan clutch in the fastlane. They are extremely easy to install. Also make sure your electric fans come on.
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