Engine Temp close to 120F HELP!!!
Thread Starter
Newbie
Joined: Nov 2003
Posts: 3
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From: Los Angeles
E320
Engine Temp close to 120F HELP!!!
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Its been close to a week now and my engine has started reporting Temps of or close to 120F. Its a '95 E320, the Aux Fans come on and stay on, but the Temp sits teasingly close to 120. WHen I hit the Freeway, it cools down to 80, but gets right back up when I hit the Streets. I've got an appt with the "Stealer" tomorrow, but wanted some input from you guys first.
What could it be? Bad Coolant Sensor? Bad Radiator? I haven't done a flush of the Coolant fluid in some time so I don't know if it might be deposits in the radiator. But would that explain why the Aux Fans stay on. HELP!!!
Rene
]Its been close to a week now and my engine has started reporting Temps of or close to 120F. Its a '95 E320, the Aux Fans come on and stay on, but the Temp sits teasingly close to 120. WHen I hit the Freeway, it cools down to 80, but gets right back up when I hit the Streets. I've got an appt with the "Stealer" tomorrow, but wanted some input from you guys first.
What could it be? Bad Coolant Sensor? Bad Radiator? I haven't done a flush of the Coolant fluid in some time so I don't know if it might be deposits in the radiator. But would that explain why the Aux Fans stay on. HELP!!!
Rene
Super Member
Joined: Jun 2003
Posts: 595
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From: Middlefield, CT
1994 E320
If the engine temp stays around 120, the aux fans will stay on until it drops to around 100. I believe the fans turn on at 107.
I have a similar problem (though not as hot), and I believe it to be the radiator. The thermostat and fan clutch are in order.
I have a similar problem (though not as hot), and I believe it to be the radiator. The thermostat and fan clutch are in order.
Senior Member
Joined: Jun 2003
Posts: 302
Likes: 1
From: Salem, OR
08 Lexus GS350 AWD. 08 Lexus RX350 AWD - wife's. 94 MBZ E320 - still have it.
Check the thermostat. When the engine is hot or at operating temperature, touch the upper hose and then the lowere house. Try to do it without butning your hands, though. If the lower house feels much cooler the the upper one, your thermostat is stuck closed or almost closed. Replacing it is a piece of cake DIY job. The cost of the part would be under $15.
Almost a Member!
Joined: Apr 2004
Posts: 41
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From: Sydney, AU
1999 CLK 320 (Fathers); 2005 Jeep Wrangler Renegade (My Beast)
great advise Arnie... the lower one was cooler than the higher one... https://mbworld.org/forums/showthrea...threadid=66133
looks like i need a new thermo as welll.. still doesnt answer the fan question unfortunately!
looks like i need a new thermo as welll.. still doesnt answer the fan question unfortunately!
Member
Joined: May 2003
Posts: 173
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From: NorCal
Mercedes-Benz 400E
My car did the same thing when the water pump started to go out. Around town the engine would always be at 120C but then once on the freeway it would go down to normal because of the fast moving cold air. It will start to lose water and that will be the final indication that it could be the water pump.
