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Heater probs

Discussion in 'The Garage' started by DieselBurb, Dec 2, 2002.

  1. DieselBurb

    DieselBurb 1/2 ton status

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    I have an interesting delima. I get out in the morning and fire up the 6.2 to warm up. By the time I get back out to leave, the engine temp gauge is showing that the engine is good and warm, but if I feel the air coming out of the heater, it is frigid (btw, the a/c compressor is disconnected). After I get going, the air warms up and gets hot and the engine temp gauge shows the engine temp going down. The thang blows hot until I slow down or stop and then it cools off to almost frigid again. Anybody got an idea as to the problem?

    /forums/images/graemlins/burb.gif
     
  2. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    check the thermostat. it may be stuck in the open position. doesn't seem right though with the gauge. just a thought
    TJ /forums/images/graemlins/truck.gif
     
  3. dubl_t

    dubl_t 1/2 ton status

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    Hate to tell ya, but it almost sounds like a head gasket problem (common w/6.2's) /forums/images/graemlins/frown.gif. How manymiles on engine?
     
  4. Cmoe

    Cmoe 1/2 ton status

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    Check to see if you have a vac. leak for the heater/fresh air control. a friend had a simmiler problem untill I fixed a vac. leak on his ford.
     
  5. DieselBurb

    DieselBurb 1/2 ton status

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    The odometer read 53xxx miles when I got it, so I don't know if it is 153xxx, 253xxx, or what. I found out that it didn't have a thermostat in it at all and it was way low on coolant. The heater works well now, but the driver's side white smokes a lot longer now that it did before. I thought it might be an injector, but now that you mention it, I am really hoping that it is not a head gasket. Any pointers on how to check it without pulling a head?

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  6. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    pop the radiator cap and start it up. if you get constant bubbles you have a blown head gasket or worse cracked head.
    TJ /forums/images/graemlins/truck.gif
     

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