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  1. J

    LB7: over heat problem

    Well I Removed and pressure cleaned the stack, it still overheats with a 11,000 lb load going up a 1.5 mile 6% Grade although I noticed that it stays at 200-210 until it shifts out of passing gear near the top, then it almost immediately jumps up to 240-250
  2. J

    LB7: over heat problem

    I have original air intake, the stack of coolers has been cleaned with water only. I am seeing temps of 250+, rpms of 2700,fan clutch engages good
  3. J

    LB7: over heat problem

    I have a 2004 lb7 over heats only with a heavy load 10,000 or larger, climbing fairly step grade. I put in a new water pump, fan clutch, thermostats, hoses, radiator cap on my mechanic's recommendation. I had a flow test done it was ok. The mechanic says now it might be a head gasket. I am not...
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