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Mitsubishi Pajero 3500 CC 1997 models on AC overheat problems

Tiny
RMONUY
  • MEMBER
  • 1997 MITSUBISHI PAJERO
  • 101,273 MILES
Mitsubishi pajero 3500 cc 1997 models on ac overheat problems I am change the Radiator and Radiator fan, Thermostat Works but my problem not solve. Iam off ac no overheat but on ac overheat problems.
Monday, October 1st, 2012 AT 6:44 PM

10 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Radiator could be clogged or the fins in the condenser and rad could be clogged with debris

Roy
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Monday, October 1st, 2012 AT 6:48 PM
Tiny
KHLOW2008
  • MECHANIC
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Do you have coolant losses issues?
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Monday, October 1st, 2012 AT 7:46 PM
Tiny
KHLOW2008
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If A/C condenser is equipped with aux fan, check its direction of air flow.
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Monday, October 1st, 2012 AT 7:49 PM
Tiny
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Yes radiator could be clogged and I change the a/c condenser, compasher and wather pamp.
I have no coolant losses issues.
Condenser fan air flow is very good. I chak all, but my problem not solve. So halp me.
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Tuesday, October 2nd, 2012 AT 9:09 PM
Tiny
KHLOW2008
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What I mean is to check the rotation of the fan blades. Improper installation can result in the fans turning the wrong way causing cooling efficiency problem.

Does the overheating occurs while running or only when stopped?
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Tuesday, October 2nd, 2012 AT 11:15 PM
Tiny
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Radiator fans turning is right way.
This car is overheating only when it was running.
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Wednesday, October 3rd, 2012 AT 7:44 AM
Tiny
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Radiator fans turn on right way. It has no problem.
This car is overheating only while it was running.
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Wednesday, October 3rd, 2012 AT 7:48 AM
Tiny
KHLOW2008
  • MECHANIC
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At high speed only?
Does the temperature gauge go down as soon as you slow down?
Does the gauge reading fluctuate fast when A/C is turned on?
How sure are you that it is overheating and not a false reading?
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Wednesday, October 3rd, 2012 AT 7:53 AM
Tiny
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  • 5 POSTS
Yes high speed up to 50-70
the temperature gauge go down a/c off.A/c on temperature up high 60, 70 and rad mark.
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Wednesday, October 3rd, 2012 AT 4:32 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Overheating at high speed driving are usually an indication of inefficient cooling system and most common cause is restriction in the coolant passage or partially clogged radiator. When was the radiator replaced and did you happen to mix any 2 different brands of coolant?

If the reading is affected immediately when A/C is turned on, it can be a false reading due to a poor ground circuit for the gauge. Do the coolants seems to spill out of recovery tank?
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Wednesday, October 3rd, 2012 AT 5:55 PM

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