2000 Mitsubishi Montero vehicle overheat

SHORTYZ11

MEMBER
2000 MITSUBISHI MONTERO
6 CYL
4WD
AUTOMATIC
127,411 MILES

Hello! Well iam trying to figure out why my montero is still overheating after replacing thermostat and fan cluth? I try to bleed the system but it seem not to work? One thing that I noticed is my upper radiator hose is hot and my bottom one is cold. So far I have no smoke coming from the exhaust pipe and removed left bank spark plug to see for any coolant leak none in the right side couldnt chk because intake is in the middle lol. Well I was just thinking could it possible be the radiator?

8 Replies

MHPAUTOS

MECHANIC
31,937 POSTS

Hi there,

you do have a lack of flow, so I would start with getting the radiator cleaned & flow tested, and may sure that the thermostat is working as new ones can be faulty.

Mark (mhpautos)

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Tuesday, August 11th, 2009 AT 10:45 PM

SHORTYZ11

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3 POSTS

Well thankz for replying back. Well tomorrow I will performed a radiator flush but on thing that I forgot to mention was that when vehicle over heat I see a the coolant reservouir boiling u know a lot of bubble die to pressure, but that got me thinking about the head gasket?

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Tuesday, August 11th, 2009 AT 11:20 PM

MHPAUTOS

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As you mentioned that the bottom of the radiator is cool while the top is hot, this will be a flow problem, be it a stuck new thermostat, failed water pump impeller blocked radiator, now just flushing with a hose may not prove the flow through the radiator as you may have many blocked cores and still have some flow.

Mark

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Tuesday, August 11th, 2009 AT 11:33 PM

MHPAUTOS

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One last thing,

remove the heater hose (one only) and flush the core and start the engine and with the hose in the radiator wait till you get flow through the hose and then re fit it, just to help bleed any air from the system.

Mark

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Tuesday, August 11th, 2009 AT 11:35 PM

SHORTYZ11

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Hey mark thanks again I will let u know how it goes once I get to it thankz for help and support hope u sastisfy with my donation.

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Wednesday, August 12th, 2009 AT 8:43 AM

MHPAUTOS

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Hi there,

All donations are most welcome, we are here to help you, so a donation or a vote will go a long way to keep us up and running, feel free to re post if you need more assistance,

good luck.

Mark.

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Wednesday, August 12th, 2009 AT 7:45 PM

PCITYGUY

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2 POSTS

Hi, I am having the same issue with a 2002 Mitsubishi Montero. The SUV used to be the most reliable vehicle I owned. New factory-spec radiator, flush, oil change (full), new water-pump, timing (the whole front-end kit). Engine service light is on and was for 25,000 miles before this issue started. No coolant in plugs. SUV accelerates fine, no hesitation or stalling. Issue is overheating when driving at any speed for more than 10-20 miles. Idles cool and heater no longer blows hot air. The SUV is overheating as the AC blows hot air when the needle reaches critical temps, e.G. Not a sensor. No smoke in exhaust. I am not in a position financially to buy another car so working to solve this. Solutions?

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Monday, October 10th, 2016 AT 7:27 AM

PCITYGUY