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  #1  
Old 10-17-2001, 10:11 PM
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Join Date: Oct 2001
Location: Canada
Posts: 298
Coolant Temperature 400E.

Hello,

How long does it take to reach 80 degree at sub-zero temperature for a 400E?

The temperature now in my area (Canada) is about 3-4 Celsius, everyday I drive about 10 km to work, I don't warm up my car first, it takes nearly the whole trip to reach 80(15 minutes), is this normal? or I have to get a new thermostat?

My other cars reach normal temperature at 1/3 of the trips (5 minutes).

Thanks
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99 BMW 540i 6-speed 110K Km
03 SAAB 9-5 wagon 80K Km
92 400E (Sold) 245K km
Still missing the days with the Benz, it kept me busy.
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  #2  
Old 10-17-2001, 10:48 PM
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Join Date: Jun 2001
Location: Omaha, NE
Posts: 962
Probably do need a new thermostat. Mine usually gets up to 80 after about 3-4 miles. I replaced mine last year when it just would not ever quite get to 80.
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'93 400E
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  #3  
Old 10-18-2001, 11:28 AM
Ali Al-Chalabi's Avatar
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Join Date: Nov 2000
Location: Knoxville, TN
Posts: 1,837
Thermostat is probably partially stuck open.

This is way too long for it to warm up, definitely replace the thermostat.
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2001 CLK55
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record
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  #4  
Old 10-18-2001, 02:22 PM
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Join Date: Oct 2001
Location: Canada
Posts: 298
Thank you, guys.

I will replace the thermostat this weekend, maybe I can also improve my gas mileage by doing that.
__________________
99 BMW 540i 6-speed 110K Km
03 SAAB 9-5 wagon 80K Km
92 400E (Sold) 245K km
Still missing the days with the Benz, it kept me busy.
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  #5  
Old 11-19-2001, 01:25 PM
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Join Date: Oct 2001
Location: Canada
Posts: 298
The thermostat was getting worse, not only it took quite long time to reach 80, but also after it reached 80, it went all the way to 110, I had to turn on heater to cool the engine.

Ordered a 80 C thermostat from Partshop, but just couldn't wait for a week.

Yesterday I took out the old thermostat, and brought it to local Canadian Tire store, I was very lucky to find a one with the same diameter, the gasket fits perfectly. It's a MotorRad brand high flow thermostat, only difference is that it's 192 F (90 C), and it cost only 22 Canadian$ (14 USD).

Now the engine warms up super fast, and the needle stays one line above 80 degree, I guess it should be 90 C.

Can I use this 90 C thomerstat for this whole winter and use the OEM 80 C when it gets warm? An extra 10 degree makes me feel warmer in Canadian winter, I hope this M119 engine is not very sensitive to coolant temperature.

BTW, the original thermostat from the car was very bad, I easily pulled out the center push rod by my hand.


Thanks.
__________________
99 BMW 540i 6-speed 110K Km
03 SAAB 9-5 wagon 80K Km
92 400E (Sold) 245K km
Still missing the days with the Benz, it kept me busy.
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