Is 120 the right temp on a 420 SEL??? - Mercedes-Benz Forum

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post #1 of 2 (permalink) Old 05-21-2012, 12:26 PM Thread Starter
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Is 120 the right temp on a 420 SEL???

I have read here and there that temperature on my 88 420SEL can go up to 120, this is normal and there should not be a problem. My aux fan works and comes on, oil and coolant are where they should be, and still in not-so-hot heat of 70 outside, the gauge goes up to near 120 after 20-30 minutes of regular driving. Air really does not work well, and things just seem HOT.

The other day, the hose blew off the radiator soon after I parked, spewing coolant everywhere.

This all does not seem normal.

Anyone have any insite into this?? Is this a thermostat problem?? THANKS
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post #2 of 2 (permalink) Old 05-21-2012, 09:14 PM
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Welcome to Benzworld, it is not normal, thermostat? put your hand on the top hose and then the bottom hose and if they are the same temperature then the thermostat is working fine. Also try cleaning the fins in the radiator with a high pressure washer.


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