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Date Registered: 01-2009
TOTAL POSTS: 3
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Towing and overheating?


We recently bought a October 2006 ST auto done 80,000 and tow a poptop caravan weighing about 1300 Kg. I tow with the overdrive turned off and cruise about 80 to 85 kph.A couple of days ago while towing the van the temperature guage climbed several times to the threequarter mark which I think is the top of the normal operating range; this happened when climbing moderate longish hills along the coast. It didn't get to the "H" mark. Normally when towing on the flat the temp guage needle sits about one third up the scale, but on this day which was about 18 degrees it rose, but fell quickly again when over the hill. There was a very moderate head wind, which I would have thought would have cooled the motor. Both cooling fans were working when I pulled over.The caravan brakes were cool to the touch after the trip. Coolant level was fine after the trip. The cooling fans turned themselves off after a couple of minutes of idling when we got home.

What I'm worried about is when I go to the mainland and the weather is hotter and some of the hills steep and long--am I going to have overheating problems?

I took the thermostat out of the side of the block and tested it. It's stamped as opening at 82 degrees and my wife's cooking thermometer says it actually opened at 85 degrees, which just might be the thermometer? Or is that enough of a discrepancy to cause a problem? Should I test the thermostat in the head as well?
7/Jan/2009, 10:13 am Link to this post Send Email PM   Send Private Message
 
johnsey Profile
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Date Registered: 01-2007
Location: Melbourne, Wantirna
TOTAL POSTS: 435
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Re: Towing and overheating?


As your vehicle has reached the 80 k mark it may or may not have had the entire cooling system flushed, as outlined in the service manual There have been cases of deposits partially blocking radiators to xtrails with similar km's. Nissan coolant is really the only one that should be used in our vehicles.

If this has been completed already then it may be a process of eliminating other causes.



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Xcited Touring


Series 2 2005 ST Auto, nudge bar, driving lights, spoiler, GME 3100 UHF, towbar , bashplate, Yokohama Geolander AT-S and Kings Springs lift X495 (c)
7/Jan/2009, 9:21 pm Link to this post Send Email PM   Send Private Message Blog
 
Revhead Kev Profile
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Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 5399
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Re: Towing and overheating?


quote:

caravan wrote:
Should I test the thermostat in the head as well?



Yes you should also test the thermostat in the head as well as they work independantly and cool separate parts of the engine.

I also agree with johnsey that you should have the engine and radiator flushed by your dealer to check there is not some left-over casting sand blocking some of the radiator cores. They will then refill with the correct coolant.

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Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
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16/Jan/2009, 3:53 pm Link to this post Send Email PM   Send Private Message Blog
 
caravan Profile
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Date Registered: 01-2009
TOTAL POSTS: 3
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Re: Towing and overheating?


Thanks Johnsey and Kev. Radiator was found to be so blocked that it couldn't be cleaned out--tubes too narrow for cleaning rods. New radiator fitted today, and new Nissan coolant so we'll see how that goes and if problem not solved, will try thermostats next.
2/Feb/2009, 9:00 pm Link to this post Send Email PM   Send Private Message
 
DonkeyMan Profile
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Date Registered: 10-2010
Location: Sydney
TOTAL POSTS: 11
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Re: Towing and overheating?


Hi Recently on the long weekend just past in NSW I had a similar issue to this towing a camper trailer.

The trailer weighs less than 800kg and the Monday when traveling back was quite hot, 40c.

I know the car will run hotter while towing but it seemed to reach a point where every incline made the temperature rise.
The temperature never reached to the H area as I stopped the car when it was about 2/3 up the gauge. Traphic had slowed and the car had been running for about 3 hours at this stage

I dropped the car off to Nissan to check over the cooling system but they couldn't find any fault.
The advise from Nissan is that normal operating temp is up to 3/4 of the gauge, and I should only be concerned if this happens when not towing.

I left Nissan not particularly happy with this advise and I would have thought that the car could deal with this load with minimal impact to normal operating temp.

Is Nissan right here or is there something I should look into. I am based near Hornsby.

Cheers

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Andrew
2005 T30 II TI, Automatic
27/Oct/2015, 9:59 pm Link to this post Send Email PM   Send Private Message Blog
 


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