Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

heater core stopped up

Discussion in 'The Garage' started by ronnny, Dec 7, 2005.

  1. ronnny

    ronnny 1/2 ton status

    Joined:
    Nov 22, 2004
    Posts:
    838
    Likes Received:
    0
    Location:
    Newnan GA
    I believe that my heater core is about stopped up. Before trying to change it out what should i do to try and un stop it? Run the water hose through it both ways several times or blow some compressed air through it? How much air would be to much? Just some thoughts as i do not really want to change it out right now. If i drained the coolant could i put something in the water like citric acid to help clean the heater core out? What do places do when the flush the coolant system and would this help? Like said i do not really want to mess it up where i have to change it right now, for i can live with the barely warm air till i fel more like changing it. The inside of the radiator looks pretty good from what i can see but does not look as if the previous owner has just changed it or anything.:confused:
     
  2. readymix

    readymix 3/4 ton status

    Joined:
    May 30, 2004
    Posts:
    6,706
    Likes Received:
    26
    Location:
    Murrieta, California
    I have always used the garden hose. run it reverse flow forst then the other way. Lather, Rinse, Repeat.....
     
  3. gmtech954

    gmtech954 Registered Member

    Joined:
    Dec 6, 2005
    Posts:
    96
    Likes Received:
    0
    Location:
    ct shoreline
    just hook the garden hose right to the heater core to flush it out. i would not rec. air because you will probably blow out the core if you went above 15psi also most build ups in coolant systems are caused by the coolant turning acidic and forming corrosion as far as an additive goes i would add a ph neutralizer
     
  4. Thunder

    Thunder 3/4 ton status

    Joined:
    Jul 20, 2000
    Posts:
    8,946
    Likes Received:
    1
    Location:
    Northeast Nevada
    Pretty much what everone else has said works for me too.Then I would also do a radiator flush with some of the most HD flushing compound you can find. . If your heater core is stopped up. Your radiator (unless new) prolly is the same way.
     
  5. gmtech954

    gmtech954 Registered Member

    Joined:
    Dec 6, 2005
    Posts:
    96
    Likes Received:
    0
    Location:
    ct shoreline
    good point thunder
     
  6. MTMike

    MTMike 1/2 ton status

    Joined:
    Feb 10, 2005
    Posts:
    2,992
    Likes Received:
    0
    Location:
    Billings, Montana
    What the others said

    Also, worst case scenerio is a new one costs $32 and it takes about 2 hours to replace one (Unless you have A/C - then I hear it's a bit trickier)
     

Share This Page