Question about 2001 Mitsubishi Diamante LS

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Heater core leaked and car wont start now

I am looking at buying an 01 Diamante but the heater core o-rings leaked and now the car wont start, the owner said that he thinks it is the starter relay. Could it be something else and how coould I check the relay before buying a new one and going to all the work to install it? Can anyone tell me how to find the relay and also how to change the heater core o-rings without a lot of work?

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I'd steer clear of this one. The starter problem could be anything, regardless of what he 'thinks'. It could be a starter, it could be wiring, it could be the ignition switch, or it could even be the relay (the cheapest and easiest to replace, which is why I suspect he 'thinks' it's the problem).
The heater core is your greater concern. There are no o-rings in the heater core itself. If the heater core is leaking it must be replaced. There is a heater shut off valve under the dash and there may be o-rings where that is plumbed in. The actuator for the heater shut off valve is reportedly prone to failure. In either case, heater core or shut off valve, it's a pain to get to, requiring dismantling or removing the dash, and will probably be quite expensive to replace unless you're really handy and mechanically inclined.

Posted on Aug 08, 2017

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Posted on Jan 02, 2017

cbcs2008
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SOURCE: new starter good batt. only clicks wont turn over 1995 montero

The Batt does not have a full charge or it is the wrong cranking AMP's for the car... find out if it is the right Batt and also that it is put on a "slow charge" over night or at least 6 hr's

Posted on Jan 20, 2009

  • 1 Answer

SOURCE: what is the easiest way

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

  • 73 Answers

SOURCE: 2001 Mitsubishi Diamante OBD2 cod p1751... where is the A/T relay

Has this symptom occured several times or just a one off? If the trans works OK I wouldn't mess with it.You know what they say about sleeping dogs! I think Mitsis are not that strong in the auto trans department

Posted on May 16, 2009

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SOURCE: 0304 code -Keep getting Cylinder 2 misfire code Mitsubishi galant

code 304 is number 4 cyl,check the plug insulator for white(arch) markings-if you see any markings replace the insulator

Posted on Aug 31, 2009

  • 133 Answers

SOURCE: How do you remove the heater core for a 2002

the dealer quote is over a grand, but from my understanding you can remove the glove box compartment and not have to go through the whole dash being taken apart.. not an hours job by any means but supposebly doable..

Posted on Dec 09, 2010

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01 durango leakiing coolant nea trans and inside of vehicle


Leaking inside sounds like the heater core. If the core is broke right where the heater hoses connect, it might be losing coolant down both sides of firewall, inside and outside. Otherwise, look for a leak at the intake manifold. That might run down back of engine near the transmission, as you indicated.
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I have a 2003 mitsubishi diamante ...the car has been nothing but problems...im kind of disappointed in my mitsu-experience..well anyways i guess the diamantes have faulty O-rings located inside the...


THE RELAY WILL NOT MAKE THE NEUTRAL OR ANY OTHER LIGHT FLASH,IT MIGHT NOT SHIFT BUT IT SOUNDS LIKE YOU HAVE A BAD OUTPUT SPEED SENSOR TAKE IT TO AAMCO FOR A FREE DIAGNOIS.










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Feb 24, 2011 | 2001 Mitsubishi Diamante

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Main problems are computers failing ( especially the one that controls the auto) and random wires breaking.
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How to change it a heater in a 2001 mitsubishi diamante


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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Nov 19, 2009 | 2001 Mitsubishi Diamante

1 Answer

Neutral light blinks when Transmission is in drive


You either have an ECM destroyed by a leaking heater core o-ring or a transmission destroyed by a broken wave ring.

http://www.transmissiondigest.com/tech/TD200508/200508ShiftPointers/200508ShiftPointers.htm

There should be a class action against Mitsubishi about all of these cars.

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Oct 20, 2009 | 2001 Mitsubishi Diamante

1 Answer

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

Feb 01, 2009 | 1999 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.
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Nov 23, 2008 | 2002 Mitsubishi Diamante

1 Answer

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


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.

Sep 28, 2008 | 2000 Mitsubishi Diamante

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