Mitsubishi Diamante overheating problems

Filed May 20, 2010 · Engine · 60,000 miles · OH

Tl* the contact owns a 2003 mitsubishi diamante. The contact stated he noticed an unusual odor of coolant and the neutral indicator began sporadically illuminating. Upon further inspection, the contact found coolant leaking onto the floorboard. In addition, the vehicle would intermittently fail to start. The dealer performed a diagnostic test and determined the failure was caused by the a.t. Control relay and produced code p1751. The vehicle was not repaired and the VIN was not available. The failure and current mileages were approximately 60,000. Updated 10/27/10.

Filed Aug 3, 2009 · Engine · 78,000 miles · AL · 1 injury

My 2002 mitsubishi diamante has o ring failure in the heater coil. I have read many complaints that this is common on this model and would like a recall on these vehicles due to the extreme nature of the issue. With the failure of the o rings come potential anti freeze vapors entering passenger compartment and causing physical damage to all passengers. It may also cause the car to overheat in the middle of heavy stop and go traffic and cause accidents and/or death. It may also cause the heating element to no longer work and passengers in the extreme winter climates may be susceptible to physical harm or death. Lastly, this is a rampant known issue with these vehicles and should be corrected at dealer cost. My car cost originally $30,000. And I would expect the american government to make these companies back up the vehicles they are selling to the american public and make them safe and worth the money that is spent on them.

Filed Dec 6, 2008 · Engine · 60,000 miles · GA

At approx 60k (I am the original owner) the car began to emit mist from the vents. The first incident was a near overheating event which caused me to check the coolant. After topping off the level the car operated normally for a few months and then repeated the behavior. The tcl went off, the check engine light came on, the mist got heavier, and the car is a danger to both myself as an operator and others on the highway because the fog from the antifreeze damages visibility. The floor mat on the passenger side has also gathered moisture from the apparent leak. This scenario is well documented by others and demands a recall.

Filed Oct 28, 2008 · Engine · 70,000 miles · MN

At about 70,000 miles I started to see a very fine mist-like smoke coming from the dash while driving. There were no warning lamps illuminated on the dash. So after the temp gauge started to go up and I could also smell anti-freeze. I checked the radiator area and could find no leak but when I checked the coolant it was low. I topped off the coolant and a couple of months later it did the same thing. I then added stop-leak and the coolant level seems to be staying but I can still smell the anti-freeze and the windows fog up. I understand there is an issue with gaskets on the heater core. I am worried the coolant leaked into my vehicle in the area of the ECM. To me, this is a serious safety issue and mitsubishi should be correcting this problem because it is very common from what I have read on-line.

Filed Sep 17, 2008 · Visibility · 132,000 miles · IL

This is the second time the heater core has started to leak. It was replaced 40k miles ago and I was charged $ 1,000 for repair costs. Having researched this, it is due to faulty heater core gaskets which mitsubishi replaced the defective gaskets with a redesigned one. The car is undrivable due to the toxic fumes from the ethylene glycol coming out of all the vents and I do not have the money to get it repaired. Mitsubishi refuses to do anything about it, and nearly every diamante on the road has had this happen. The carpet is ruined from the coolant leak as well, and many have had the ecu for the transmission fail due to coolant leaking on it.

Filed Jan 17, 2008 · Visibility · MD

My 2001 mitsubishi diamante's heater core went up. I have massive amounts of coolant leaking on my passenger side, thick smoke coming from my vents and a bad odor coming from the vents. I have read this is a very very common thing with mitsubishi's especially diamante's.

Filed Dec 19, 2007 · Visibility · 37,813 miles · CA

37813 miles. Heater core leaking. Notice the sweet smell and now overheating occurs.

Filed Nov 24, 2007 · Visibility · NY

I have a heater core failure in my 2002 diamante. I now have antifreeze leaking into my passenger side floor. I have an antifreeze smell and smoke coming from the vents in the car. I got low on antifreeze and almost overheated on the belt parkway. It is very hard to see at night because windows will fog up and defroster makes problem worse. I have been told the cars computer is positioned under the heater core so I have to hope I do not have a computer issue as my service light has gobne on as well> I have had to replace 3 engine sensors in the last few months ( the heater core issue could be the root cause). This is a very serious situation and needs to be addressed. I see alot of the complaints for this model are for this issue. There are many people with this issue.

Filed Oct 22, 2007 · Engine · FL

My car is making me sick!! I noticed a smell of anti-freeze coming out of the climate control vents. Upon further investigation, I noticed anti-freeze/engine coolant leaking from the heater core down onto floor mats, climate control intake, electrical wiring inside dashboard, and more importantly automatic transmission computer. This is a significant safety and health issue and needs to be addressed immediately. Where is manufacturer's recall.

Filed Jul 10, 2007 · Engine · 42,900 miles · OK

Maple syrup smell from air vents then car started to overheat heatercore failure, antifreeze in floorboards on windshield and coming through air vents. A new heatercore installed very costly had to do work myself because warranty expired. Had to shampoo carpets and buy new floormats because the anitfreeze ruined them. After reading many complaints you would think that a recall would be made. Just because no deaths the consumer should suffer. What about the money that it took to make the repair. That was money taken from my family that we use to feed us and have shelter. Come on you have to authority to do something so why don't you.