Question about 2000 Mitsubishi Diamante

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What is the easiest way to replace the heater core in a 2002 mitsubishi diamante

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  • robertcutler Sep 28, 2008

    what is the best way to change the heater core in my 2002

    mitsubishi diamante

  • yusufkhan Dec 01, 2008

    Smoke emitting from the Vents and forming moisture inside the glass

  • marcin123451 Dec 31, 2008

    I smell anti-freez in my mitsubishi diamante while heating is turn on, and also my windows are getting foggy, i think it is heater core. what is the easiest way to replace it. Can somebody navigate me in detailes how to do ti ?

  • tonyduvall5 Jan 10, 2009

    same problem. I've been trying to figure out how to fix it without taking the car to the dealer. Reading many helpful hints but so far all I've been able to do is pull the carpet back, soak up the antifreeze, and remove the heater hose .....

  • bender007 Jan 20, 2009

    yep same deal here - looks like the only way is to seek professional help - mine is in the verada xi model with climate control - I had the same problem with a kia sportage 4x4 cost $1200 to replace - luckily was on warrenty.


  • bender007 May 11, 2010

    thanks tiger - is there anyway we can get more detailed instructions on getting to the heater core unit - i.e a bit of a guide to dismantling the dash to get to it ?

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2002 diamante heater core sits in center of the dashboard just over the on board computer for the car. To access it you need to take out the console between the seats and the entire dashboard to get to it. The only thing wrong with the heater core is the leaking gaskets (about $10 in parts). Mitsubishi knows about the problem and when the dash is taken apart you will see a plastic sheet over the onboard computer to somewhat protect it from the leaking heater core gaskets. So the expense in the repair is in the labor to get it all apart and back together again. The dealers seem to replace entire heater core when they fix this problem. I did just the gaskets and that solved the problem. I have read others who did it themselves only replaced the gaskets and that solved it for them as well. Maybe the dealers think you will feel better replacing a larger part for so much labor.

Posted on Feb 18, 2009

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How do you remove the heater core for a 2002 Mitsubishi Diamante?


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Why do you think you need a heater? Has the fan stopped blowing or are you referring to the need to replace the leaking gasket in the heater core?
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Mar 01, 2009 | 1999 Mitsubishi Diamante

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The best way to replace a heater core on a 2001 Diamante car.


I think the steps to replace the 'heater core' are a few too many to list here- sry and it is a pain to do in most vehicles- im not familiar on the exact steps on the particular veh. Best thing to do is get a repair manual and follow its guidance on removal and reinstallation of the heater core. Good Luck

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Heater core mitsibishi Diamante


I have a detailed write up but it is too long to post

Send me an e-mail I can send the write up to

Jan 14, 2009 | 2003 Mitsubishi Diamante

1 Answer

2002 Diamnte does not defrost, smells like antifreeze


If you are smelling antifreeze then there is going to be a leak.
Look at the drain hole for the A/C drain pan. You may not be seeing it because it is mixing with the condensation from the evaporator. Sounds like a heater core or hose connection at the heater core.
Good Luck

Nov 23, 2008 | 2002 Mitsubishi Diamante

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