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  #31  
Old 07-19-2004, 02:06 PM
Desert Diesel I
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Running Temp's



OK Men Let's talk Heat:

1997 E300D w/ 119K on the clock

I have owned this car four months in Airizona.

Outside Air temp in April 80 F; temp gage at 80C

Outside Air Temp in July; 105 F; temp gage 85-90 C in combined highway and city driving.

If I park her with the A/C on in July she may raise to 95C and that is my story.

Great cooling system for such consistent results with very diverse air temps.

Have a Great Day!

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  #32  
Old 07-19-2004, 06:08 PM
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Join Date: Sep 2003
Location: Cambridge MA
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heated discussion

I've just read this thread.
89 300CE runs just about 85C all the time. Creeps up a bit in traffic, but not much.
My question is: Shouldn't there be an "ideal" operating temp? For best cumbustion and fuel effeciency? If so, what is it?
When I bought this car my tech's advice was simple - Keep up with the oil changes and never, never let it overheat. It croaks head gaskets.
But I think mine should run hotter. Do thermostats come with a temp rating of some kind?
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  #33  
Old 07-20-2004, 06:19 PM
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Re: heated discussion

Quote:
Originally posted by dwest
89 300CE runs just about 85C all the time. Creeps up a bit in traffic, but not much.
My question is: Shouldn't there be an "ideal" operating temp? For best cumbustion and fuel effeciency? If so, what is it?
It is, the "ideal" temp is that specified in the manual, or on the small plate in engine bay, above right headlamp. That is, 80C.

~Nautilus
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1990 260E Sportline (that's 300E 2.6 for our American friends) -> sold
2001 E320 4Matic Elegance -> my Dad's daily drive
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  #34  
Old 07-20-2004, 09:25 PM
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Mine is a 85 190E 2.3 8vlv, and in normal driving conditions it will keep a steady 85C, it used to be 80C, but the new thermostate is set for 85C apparently this is better. When stuck in traffic temps will go up to 100C and that's when the fan kicks in and cools it right back down to 80C.

I didn't like how the temp would rise up and fall down all the time, knowing a bit about metals I know this causes the material to tire out, so I put a switch in the cabin to control the aux fan and whenever I get stuck in traffic I switch it on, it keeps the car at a 85C steady even if I'm sitting in traffic for hours.

xp

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