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volvo d13 runs hot

my volvo d13 water temp goes up and down with engine rpms will get to 210 fan comes on it goes down if i run 60 it stays down if i run 68 temp goes up fan comes on and off

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If you happened to have a tail wind that day it would not be uncommon. Certainly a truck works harder at higher speeds, but still should not be an issue. One possibility if your truck has a few years on it is bugs clogging up the radiator fins. Spray it down with a mild detergent, let it soak then hose it out from the back side if you can. You'll be amazed how many pounds of junk can come out of there.

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this situation is an every day issue have wash out radiator as u mentioned but no difference in temp. this may be common but to me my fan runs too much dosen't matter the weather conditions or loaded or empty, but thanks for the answer


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randy duckworth will be eternally grateful.
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