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Old 05-01-2002, 09:09 PM
Dee Dee is offline
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Question C36 Overheating??? Techs please help......

First of all I would like to say hello to everyone! This is my first post and I have searched the forum for answers but it seems there aren't many C36 owners.

OK, I have a 1995 C36 AMG and I have some questions about operating temperature. What is normal operating temperature for my car? Reason why I'm asking is because I noticed recently that the temp goes up to about 100-110 degrees.

Normal daily drive for me, is your normal stop and go through city streets. The temperature outside is a calm 65-70 degrees. The operating temp in the car will read 85-90 but I will drive several miles and the car will warm up to 100-110. When I stop the temp goes up to 100-110 but drops when I drive to about 95. Is this normal? My cousin has the exact same car and his normal operating temp is and average of 85 degrees and does not fluctuate at all like mine. I have changed and flushed the radiator, as well as the fan clutch. I will be changing the t-stat this week.

I am concerned cause summer is coming and to me this temp seems kinda high and I dont even have the a/c on at all!!! The fan is really getting on my nerves cause it is constantly coming on. I have brought it to several Benz shops and get mixed answers!!! Some say its normal and some say it is running high. Can someone with experience please help! Thanks
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Old 05-01-2002, 10:10 PM
jsmith's Avatar
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wait and see what the new thermostat does. there was a similar post a few days ago on an e320. i have driven a clk 55 and the temps hover in the 85-90 range in traditional MB fashion yours is borderline on the high side. also, check the concentration of your coolant, 40% to 50% works best....
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Old 05-02-2002, 01:09 AM
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Our C36 ran at about 83-87C most driving conditions, stopped in heavy traffic at 35C ambient (close to 100F I think), the temp would rise to 100C, maybe a touch above with the AC blowing as hard as it could.

Sounds like you're running a touch hot. Could be the electric fan, could be the thermostat. Thermostats are cheap and easy, and it's easy to watch for fan engagement.
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Old 05-02-2002, 09:38 AM
DTF
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I just went through this with an M104 engine. The auxiliary fan relay was bad (cheap repair), that was changed as well as the thermostat. I was looking at temps of close to 115C to 120C in easy city driving before the fix. Now temps are around 80 C to 90 C regardless of where and how I'm driving. Good luck ... Get it fixed soon so you don't burn up a headgasket.
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Old 05-02-2002, 09:57 AM
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if as Dee says "the fan is constantly coming on", then the relay is working...
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Old 05-03-2002, 12:11 PM
Dee Dee is offline
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Thanks for all of the responses. I will be changing the T-stat this wekend and hope it brings it down. I will let you guys know the status when I am through. Again, thank you.
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