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1990 Chevrolet 3500 Pickup

 

Question: Coolant

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lcomer72, 6.2L V8 Diesel, Indianapolis, IN, September 24, 2009, 10:28
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My truck temperature tends to rise when go about 70 MPH. I flushed the system, replaced the thermostat and the clutch fan. I also pressure washed the radiator's fins.

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  • Medium-star Best Answer
    dandd September 24, 2009, 14:30
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    Take a flashlight and stare down into your radiator ( with the coolant out ) and see if the core of your radiator is getting plugged.

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  • Answer #2

    Visitor, April 14, 2011, 07:43

    She may be leaning out at 70 mph do you have a exchaust temp gauge or a turbo presser gauge?

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