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Old 07-10-2002, 09:42 PM
Registered User
Join Date: Jun 2002
Location: Maryland
Posts: 17
overheat 95E320

My engine temp almost reached 120 today, this was after 20 min drive home. Just checked the fluid fan ( this is new to me ) it turned the same hot or cold engine. The aux fan seem to function normally. I checked the fast lane parts store they don't list the fluid fan. Where can I get one? Is the fan the only problem , what else should be checked? Reading these posts overheating seem to be a common problem, are there any recalls regarding this issue?
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Old 07-10-2002, 10:03 PM
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Join Date: Aug 1999
Location: Florida / N.H.
Posts: 8,768
Before you go on a diagnoses goose chase, change the thermostat......
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Old 07-10-2002, 10:16 PM
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Join Date: Mar 2002
Location: Naperville, Illinois
Posts: 92
There are a number of things that could cause your overheating problems. To name a few, you could have a stuck thermostat. Or you could have lost antifreeze. Both of these can be checked easilly. When you say that the auxilliary fan(s) are operating, are you sure that they are operating at high speed? There are two speeds to these fans. Low speed is triggered when A/C pressures are two high. The high speed fan is triggered by high coolant temperature. With the hot weather prevalent now, you could potentially have the aux fans come on low speed which may be insufficient to lower coolant tempearture. Are you sure that both aux fans are coming on? They should both be on or off together. If only one fan is operating, you have a bad fan or wiring to the fan. One fan operation may not be sufficient to handle the summer temps. If the fans do not come on when engine temp approaches 110 degrees, you may have a defective temperature switch, a blown fuse in the fuse box, a bad aux fan relay, or you may have blown the fuse that is plugged into the aux fan relay. If the fuse at the relay is bad, and is 15 amps, replace it with a 20 amp fuse (as has been done on most 94/95 E320's). Hope this helps.
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Old 07-10-2002, 11:30 PM
Senior Member
Join Date: Apr 2001
Location: Baton Rouge
Posts: 485
Did you know almost every person I heard that changed a fan clutch it never fixed their problem. Listen to the suggestions they have posted and go from there. Dont go buy a fan clutch just yet . Remember that the radiator has to be hot enough for the viscous fan clutch to tighten up and engage. So if your radiator isnt hot all the way across no fan engagment. If radiator is warm up top but cold towards bottom you either got a bad thermostate or clogged radiator. If the system has air in it from a coolant leak you will overheat. If the radiator cap is bad and wont hold pressure then you will overheat. See where I am going with this. Consentrate on diagnosis and not parts replacing . As for auxillary fans they will come on when the a/c high side reaches around 300 or so . First you need to find why its overheating , a/c off .
euro 287
Mercedes Technician 7 Years (retired to Hyundai)
2000 Dodge Durango
98 Mazda truck
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Old 07-11-2002, 10:54 PM
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Join Date: Jun 2002
Location: Maryland
Posts: 17

Thankyou all for the help today I changed the thermastat and that seemed to solve the overheating problem.
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