2000 Freightliner 12.7 operating temp. Running too cold.
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Rideandrepair, Feb 10, 2021.
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IF you go to the winter cover be sure to leave the pass. side open a bit so turbo can get some cooling air on it?
Rideandrepair Thanks this. -
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There are seals that are inside the housing that wear out and let coolant leak past
through the rad and over cool the engine. they are down inside the housing.
More often than not its the seals leaking and there is not a problem with the thermostats.Rideandrepair Thanks this. -
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Ok, finally got to warm weather. It’s 48 degrees. Idling at 1000 rpm. Fan just came on just about 200, Went down immediately to 190, fan shut off, only tan about 15 seconds. Temp went down a little more, now headed back up. Seems normal. Just running cold in cold weather.At an idle, and even cooler running down the road. Runs cool enough that Cab heat is noticeably less. Last pic is with manual fan switch on, after about one minute. That seems a bit too cool.
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