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Operating Temp when Towing

8480 Views 25 Replies 14 Participants Last post by  Rossco
Operating Temperature
I have just purchased a new Touareg V6 180. Have done 4500km now. I recently towed our caravan which is not big 15' to South Australia a one day 800km trip approx. it was a warm day 37c degrees plus. I noticed the temperature gauge that always sat at 90 degrees continually fluctuated between 90 and 105 (still in the normal range but at the high end). I have never experienced this with my other tow vehicles (Land Rover discovery & Nissan Pathfinder). I was towing at 100kph. The car was fantastic and did the job with ease, but I have a question re the temp gauge movement. Is this normal? Have other owners who tow experienced this. The manual does say the vehicles operating temp will be effected by outside ambient temperatures. Advice from the technical people at the VW dealership say this is normal, but as I have said I have not owned a vehicle that has had the temp gauge continually go up and down like this? I would appreciate feedback from others who may have experienced this. As I purchased the Touareg primarily for a tow vehicle and will probably being towing when the ambient temperature will be 35c plus often, I would like some assurance all is ok?
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I note that our 2015 180 TDI is a lot more "sensitive" temperature wise than was our previous 2009 T2. When towing the caravan I will always utilize the manual mode especially when going up any steepish hills. I note that if I leave it in "D" the temperature will increase, but not to the point of being critical and it certainly performs better if I take it out of Auto when under load. This, in my opinion has to be better for the transmission too. It only remains in "D"in ideal conditions when towing our van which weighs in at 2361kg ATM.
I do think back fondly (if that is the right word) to last year when we had to get a whole new engine when the Treg was just 3 months old, because when we towed the van then, it would overheat, due to the cracked engine block and leaking head gasket. What other new vehicle would produce so much joy?
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