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Old 02-24-2015, 05:05 PM
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Overheating 3.6 V6 towing

Recently in very hot weather - 41C (106F) towing our camper trailer, (max weight 1.2t) our Overland overheated. The warning light flashed, but due to the road - steep long climb there was nowhere to pullover and the vehicle seemed to go into self preservation mode (would not rev over 2000rpm or change down) As soon as the climb finished the temp returned to normal but then had the same happen during a climb on the freeway later only to again cool as soon as the top of the climb was reached. Coolant level is fine and there appears to be no lasting effects. Dealer said this was "normal" and that engine temps are meant to run high (30mins @ 150C is apparently ok!)
Having towed with this rig in full camping weight in warm to hot temps before (in low range and deep sand for 3-4hrs at a time with no issues) I was very surprised that this overheating would happen.
Help please - is this a 1 off due to conditions or have others had similar issues?

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Old 02-25-2015, 02:06 PM
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Re: Overheating 3.6 V6 towing

You'd get a better response in the WK2 section. The WK section is for 2005-2010 models.

It sounds like normal behavior to me - it was really hot and you were towing up grade. Without knowing how fast you were going, and the gear you were in, it's tough to say for certain. Next time, slow down and user a lower gear. Problem solved.
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Old 02-25-2015, 02:52 PM
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Re: Overheating 3.6 V6 towing

Quote:
Originally Posted by aunty jack View Post
Recently in very hot weather - 41C (106F) towing our camper trailer, (max weight 1.2t) our Overland overheated. The warning light flashed, but due to the road - steep long climb there was nowhere to pullover and the vehicle seemed to go into self preservation mode (would not rev over 2000rpm or change down) As soon as the climb finished the temp returned to normal but then had the same happen during a climb on the freeway later only to again cool as soon as the top of the climb was reached. Coolant level is fine and there appears to be no lasting effects. Dealer said this was "normal" and that engine temps are meant to run high (30mins @ 150C is apparently ok!)
Having towed with this rig in full camping weight in warm to hot temps before (in low range and deep sand for 3-4hrs at a time with no issues) I was very surprised that this overheating would happen.
Help please - is this a 1 off due to conditions or have others had similar issues?
When you first got the warning, or noticed the temperature was going up, did you immediately slow down and drop to a lower gear, turn off any AC, or other head loads?

Continuing to run until it went to limp mode seems like a strange way to continue unless you were within walking distance of shelter, cooling, etc.
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Old 02-25-2015, 03:20 PM
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Re: Overheating 3.6 V6 towing

Thanks for your thoughts. Yes was in 3rd (auto) had turned air con off, was travelling at 90lms per hr prior to the hill and had noticed the temp rising but was not expecting it to continue ( on past experience).
There was nowhere to stop on this hill - narrow with guard rails so had to continue. "Shutdown mode" held the car in 3rd and would not allow change either up or down or rev beyond 2000. This fixed itself as soon as the hill crested and temp dropped.


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