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#1
03-10-2008, 02:51 PM
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New to me E420, runs cold @60C
Hi guys, my new 1994 E420 runs alittle on the cold side, I did an hour long highway trip at 60 mph, and it runs at 60C the whole time. In stop and go driving i did see an 80, and before I had a fan shroud it got to 100. but now it just sits at 60. Is this normal behaviour.
My first thought was that my thermostat is bad, but wanted opinions first.
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1984 Euro 300SDC, (4spd standard) 1986 Toyota Landcruiser Diesel HJ60 5spd X2 Gone but not forgotten (some sold, some stripped) 1983 300 SD, 1985 300 SD, 1983 240D, 1986 300 SDL, 1985 300 SDL, 1983 300 D, 1984 300 D, 1985 300SD, 1987 300 SDL, 1983 300 SD, 1985 300 TD Euro, 1983 380SEC, 1990 300 D, 1987 300D, 1982 300D, 1982 300D, 1994 E420, 1987 300 TD, 1987 300 D, 1984 300 D 
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#2
03-10-2008, 03:17 PM
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I've got a 300SE (W126) that runs around 60c also, and my tech says not to worry. It's been like that since I've had it which is 4 years and close to 60K miles.
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Marc Galassini '93 300CE 38K Sold '89 560SL 19K Sold '91 300SE 191K Totalled 11/6/08 '90 300SE 90K
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#3
03-10-2008, 03:19 PM
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Thermo is stuck open, but you will need the engine serial # b/c there was a mid-year change in thermo and they do not interchange.
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A Dalton
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#4
03-11-2008, 12:47 PM
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E420 Thermostat
I had the same problem with my E420. Had a new thermostat installed and now it runs perfectly at 80C. Any temp cooler than that would encourage excessive carbon. At 100C the moisture generated in the crankcase starts to evaporate cutting down the formation of acids.
Anziani 300E 200K E420 110K
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#5
03-11-2008, 02:02 PM
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Quote:
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A Dalton
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#6
03-11-2008, 02:20 PM
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Quote:
What do you get for gas milage on that car? jp
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Jeff Pierce Current Vehicles: '92 Mercedes 190E/2.3 (247K miles/my daily driver) '93 Volvo 940 Turbo Wagon (263K miles/a family truckster with spunk) '99 Kawasaki Concours Gravely 8120 Previous Vehicles: '85 Jeep CJ-7 w/ Fisher plow (226K miles)'93 Volvo 940 Turbo Wagon '53 Willys-Overland Pickup '85 Honda 750F Interceptor '93 Nissan Quest '89 Toyota Camry Wagon '89 Dodge Raider '81 Honda CB 750F Super Sport '88 Toyota Celica '95 Toyota Tacoma '74 Honda CB 550F
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