Heat issue

Discussion in 'Chevy Truck Forum' started by Jprice2ndlt, Dec 22, 2016.

  1. Jprice2ndlt

    Jprice2ndlt Full Member

    Joined:
    Oct 1, 2015
    Messages:
    70
    Likes Received:
    91
    Trophy Points:
    18
    i have a 94 k1500 when I first bought it the heat was super hot but the heater core was leaking. I bought a new heater core replaced it but now it only gets warm and not hot. What could be going on
     
  2. kbrown11

    kbrown11 Full Member

    Joined:
    Dec 5, 2015
    Messages:
    910
    Likes Received:
    1,727
    Trophy Points:
    93
    Gender:
    Male
    Occupation:
    Customer Service Representative
    Location:
    Alburquerque
    I would try a thermostat. I think the thermostat maybe opening too soon, not letting the truck warm up enough.
     
  3. Jprice2ndlt

    Jprice2ndlt Full Member

    Joined:
    Oct 1, 2015
    Messages:
    70
    Likes Received:
    91
    Trophy Points:
    18
    I put a new 190 degree thermostat when I put in the motor. Could that be the issue
     
  4. kbrown11

    kbrown11 Full Member

    Joined:
    Dec 5, 2015
    Messages:
    910
    Likes Received:
    1,727
    Trophy Points:
    93
    Gender:
    Male
    Occupation:
    Customer Service Representative
    Location:
    Alburquerque
    No, i think the temp of that thermostat is ok. How long ago did you do the heater core? One other possibility is air in the system if you just recently did the heater core.
     
  5. Jprice2ndlt

    Jprice2ndlt Full Member

    Joined:
    Oct 1, 2015
    Messages:
    70
    Likes Received:
    91
    Trophy Points:
    18
    I redid the heater core about a year ago when I replaced the motor but I had other problems as well and never really got to drive it to test it. Got it running this summer then the transmission went out and just got it back in time for winter. How do I check for air
     
  6. kbrown11

    kbrown11 Full Member

    Joined:
    Dec 5, 2015
    Messages:
    910
    Likes Received:
    1,727
    Trophy Points:
    93
    Gender:
    Male
    Occupation:
    Customer Service Representative
    Location:
    Alburquerque
    I think after that long it should have burped itself. Usually all you have to do it drive it and over a couple of days all the bubbles come out of the system. I had bought a brand new thermostat for my car last year because the heat wasn't working. I replaced the thermostat and it fixed it. About one year later that thermostat went bad and the car would not heat up. I replaced it again and that fixed the problem, nice and warm now. The thermostat I bought last year was from Autozone, this new one I bought from Napa.
     
  7. Jprice2ndlt

    Jprice2ndlt Full Member

    Joined:
    Oct 1, 2015
    Messages:
    70
    Likes Received:
    91
    Trophy Points:
    18
    Will have to check the thermostat I notice that it never gets over 170 on my gauge so maybe I should try a different one
     
  8. kbrown11

    kbrown11 Full Member

    Joined:
    Dec 5, 2015
    Messages:
    910
    Likes Received:
    1,727
    Trophy Points:
    93
    Gender:
    Male
    Occupation:
    Customer Service Representative
    Location:
    Alburquerque
    You could also check to make sure that the heater core is not plugged. Warm the truck up and turn on the heater. Feel the two hoses going to the heater core, they both should be warm/hot. If the inlet hose is warm/hot and the outlet hose is cool, your heater core maybe plugged up.
     
    leolkfrm likes this.
  9. Jprice2ndlt

    Jprice2ndlt Full Member

    Joined:
    Oct 1, 2015
    Messages:
    70
    Likes Received:
    91
    Trophy Points:
    18
    Ok thanks for the input
     
  10. leolkfrm

    leolkfrm Full Member

    Joined:
    Mar 2, 2008
    Messages:
    12,428
    Likes Received:
    7,514
    Trophy Points:
    113
    Location:
    N.Y.
    give it a quick back flush when you change the t-stat cant hurt, might have sent some garbage into it from the engine change
     

Share This Page