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Overheating on hills with A/C
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=3&t=75998		 Page 1 of 1
Author:  jmark [ Wed Jul 17, 2013 9:08 am ]
Post subject:  Overheating on hills with A/C
Hello Guys,

I'm having some weird issues with my KJ as of late.

This happened before and after i swapped the water pump recently.
On hills, 3000rpm+ with A/C on she'll overheat. kill the A/C she'll stop overheating.

Tstat, hoses and radiator are all original, fan works OK, currently at 160k miles.

Should i swap the radiator, tstat and hoses? nothings leaking at the moment, coolant looks good, no signs of oil in the coolant or vice versa.

Any thoughts?


Thanks!
Author:  Glend [ Wed Jul 17, 2013 10:54 am ]
Post subject:  Re: Overheating on hills with A/C
Flow test the radiator there have been a few cases lately of crud build up blocking core flow. Hope you have been running HOAT
Author:  fortx4 KJ [ Wed Jul 17, 2013 3:50 pm ]
Post subject:  Re: Overheating on hills with A/C
Make sure your fan runs consistently with the a/c on. It might work intermittently and not keep your radiator cool enough.
Author:  SENT [ Tue Jul 23, 2013 4:43 pm ]
Post subject:  Re: Overheating on hills with A/C
About year ago i had overheating troubles with my crd on speed about 80 mph: even with heater turned on to max temp i have got 3/4 on dashboard and needed to slow down to decrease the temperature. I dont say about traffic jams - it was impossible to use a/c. Then i removed all of radiators and cleaned them with the karcher.

Now i have dead electric fan (suppliers dont have it in stock and i have to wait) but even without working electric fan i drive 95 mpg with 90 F outside and a/c turned on and my coolant temp sensor shows less than half.
So just try to clean your radiators first
Author:  jimymc [ Sat Aug 10, 2013 1:30 pm ]
Post subject:  Re: Overheating on hills with A/C
I had a similar problem and it turned out to be an intermittent radiator fan.

Sent from my DROID RAZR using Tapatalk 2
Author:  SENT [ Wed Aug 21, 2013 2:37 pm ]
Post subject:  Re: Overheating on hills with A/C
So the 1.5 year was passed and i again had troubles with transmission looked like overheating. When i disassembled all radiators and intercooler i sow the same picture - all the central parts of radiators was really very dirty. Mosquitoes and other dirt covers most part of surface. So liqui moly cleaner and karher - and all the troubles is gone. You have to clean it first before to try all other possibilities i think.
Author:  LibertyFever [ Thu Aug 22, 2013 5:32 pm ]
Post subject:  Re: Overheating on hills with A/C
SENT wrote:
So the 1.5 year was passed and i again had troubles with transmission looked like overheating. When i disassembled all radiators and intercooler i sow the same picture - all the central parts of radiators was really very dirty. Mosquitoes and other dirt covers most part of surface. So liqui moly cleaner and karher - and all the troubles is gone. You have to clean it first before to try all other possibilities i think.

I strongly agree. After recently cleaning my rad I've noticed an improvement.

sent from my Galaxy SIII & Tapatalk4 beta
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