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thermostat

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by k5blazerus, Oct 10, 2001.

  1. k5blazerus

    k5blazerus 1/2 ton status

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    I am still having problems getting heat from my truck.
    I have a 4core HD radiator and a knew 350 and it has a 195 degree thermostat in it and I still cant get any heat. Do i have to go to small temp thermostat to get heat. I dont even think it reaches 195 becuse the thermostat wont even opean. any Hints.
    thanks colin

    Save the whales Harpoon a fat chick.
     
  2. DesertDueler

    DesertDueler 1/2 ton status

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    Sounds like you have a big air pocket in your cooling system. When you changed the radiator did you turn the heat on when you burbed the system to get all air pockets out?

    86Jimmy 4"&35"MTRs,87 burb 4"&35"MT,69Firebird w/525 hp,and 70GTO live in PHX,AZ<a target="_blank" href=http://www.geocities.com/modifierperformance>My vehicles</a>
     
  3. Blazer_Boy

    Blazer_Boy 1/2 ton status

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    How are your hoses routed? You should have one dump into the rad and the other suck from the manifold. Having the hose dump into the water pump drops alot of cold water on the thermostat and moves the water to fast through your heater core.

    <a target="_blank" href=http://www.geocities.com/bigkern76>http://www.geocities.com/bigkern76</a>
     
  4. Zepplin

    Zepplin 1/2 ton status

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    Any time you change the theromstat or flush the cooling system you need to purge all the air out of the system.
    Just fill the radiator, but leave the cap off, start the engine and let it run so all the air gets out of the cooling system. You will see air bubbles coming from the fill neck on the radiator.
    Wait until the thermostat opens and then you will see the level of coolant go down. Top it off and then put the cap on.
    Couldn't be easier!

    74 Blazer
    Zepplin
    Check out my Blazer<a target="_blank" href=http://community.webshots.com/user/zepplin1976>http://community.webshots.com/user/zepplin1976</a>
     
  5. bigblue

    bigblue 1/2 ton status

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    I am having the same problem. I flushed the system and did everything to get the bubbles out. My heater hasn't worked for about a year and I really need it!. What else could it be? Should I change out my heater core?

    Surfing is Life...
     

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