Heater core replacement, help!
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Northstar Engines and System Technical Discussion Discussion, Heater core replacement, help! in Cadillac Engine Technical Discussion; Well it appears we screwed up when replacing the engine. We forgot to take a hose off the heater core ...
  1. #1
    Luey357 is offline Cadillac Owners Member
    Join Date
    Mar 2006
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    16

    Heater core replacement, help!

    Well it appears we screwed up when replacing the engine. We forgot to take a hose off the heater core and when we raised the body it broke some of the plastic off. So now i'm guessing we have replace the heater core and I did some searches and came up with nothing. Do I have to take out the whole dash or what? I have all the factory manuals, but that just says to remove "instrument panel compartment" and there is nothing on removing that item.

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  3. #2
    Luey357 is offline Cadillac Owners Member
    Join Date
    Mar 2006
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    Re: Heater core replacement, help!

    BTW, we have the engine still out, so can I replace it by removing the hvac module? Can I even remove the hvac module? It appears that there is two studs and two bolts remaining that is coming from inside that either is difficult or impossible to get at.

  4. #3
    Luey357 is offline Cadillac Owners Member
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    Mar 2006
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    Re: Heater core replacement, help!

    Nevermind, figured it out (after taking hvac module out). It came out from inside the car fairly easy. Now we just have to seal up the hvac module and finish installing engine. Monday we'll get the new heater core.

  5. #4
    tgs2101 is offline Cadillac Owners Member
    Join Date
    Oct 2003
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    22

    Re: Heater core replacement, help!

    Could you give a brief description of the heater core replacement steps you took, to replace your heater core? I think mine is clogged up, or rusty or something, as that is the only thing I haven't replaced in the cooling system.

    But at this point, I'm afraid it's the head gaskets.

    Since you replaced the engine, would it be easier (time/materials) to spend $3K on a guaranteed used NorthStar Engine vs. just replacing the head gaskets?

    I have 132K miles on this engine.

    Thanks,

    Tommy

  6. #5
    krimson_cardnal's Avatar
    krimson_cardnal is offline Cadillac Owners Enthusiast
    Automobile(s): 96DeVille
    Join Date
    Aug 2005
    Location
    NY Capitol District
    Age
    67
    Posts
    962

    Re: Heater core replacement, help!

    check in tech tips heater core replacement. it's for a 96DeVill I just did should be a good guide for you. K_C

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