New VW 3L V6 diesel biTurbo putting out 700Nm torques.
I must admit that my jaw dropped at a 138 degree oil temperature. My prior expierience was that 115 - 120 was a maximum. Apparently modern synthetics don't break down until 175 degrees or so. A big question is what their viscosity is at 175 degrees; just because the oil doesn't break down doesn't mean it's maintaining a proper film to protect from metal-to-metal contact I personally would keep my oil change interval way down (3000mi/5000km) if I was seeing 138 degrees when towing.While my water temp stays at 90C (194F) my oil temperature reaches 138C (280F) when towing up hill. Ambient 35C (95F). Is this normal? What is the max?
Opps. I meant temp to say 200 degrees. Straight up on the gauge. Again, I have not noticed it ever moving once warmer up. If it moved less than 10 degrees, then it must be something simple. Maybe water pump or radiator as has been mentioned.I have the same Treg. I tow a 25' Airstream, use a ProPride hitch, and are now 3600 miles into my current long trip. I was up and down thru NC, Tenn, KY, then thru midwest and now in Montana (on the flat side). I weighed my vehicle at a Certified scale. I check axil weight and total weight. My loaded wt is 63-6400 lbs. Tongue wt about 700 lbs. With the ProPride, I have the wt pretty equal on each axil. I measure the wheel wells and do my best to match. It is within 1/2" of the pre load.
My temp needle has never moved off of 250 (straight up on the gauge). With trailer, without trailer, flat or pulling up hill. No change. Up and down travel 11MPG, flatland 13 MPG. I only run with Premium Top Tier petrol. Once I was stuck and had to use regular with Ethanol, but really experienced no difference
What has really impressed me is using the Touareg cruise control. I let it do its thing, and it changes gears as needed. Cruises usually in 7th. Occasionally 8. In Montana against a steady 20mph head wind it would drop to 6th gear, but did it effortlessly. I had been using the manual shift option, and my service manager at VW told me not too. Let the onboard computor control. The up hill part is understandable, but this thing does a terrific job downhill. It will keep the speed the same, and if it cannot, sends a message "apply brake."
I had a chronic issue with a warning message concerning transmission. It was not predictable. Turned out, at least the dealer said, to be a low pressure fuel pump. So, water pump may be a part of it. In the past, fuel pumps either worked or didn't. The Treg was working at a reduced pressure.
Tomorrow I will go over a high pass in the Rockies to Missoula for the summer. I am having the local VW dealer in Missoula do a service and check everything out. I will not tell him I am towing 6300 lbs. Once they check it out, I am going to tell them I have been towing for 4000 miles. See if he goes back and checks anything else. I did not want to plant a pre determined cause before he evaluates. In FLorida, the Service Manger drives a 2006 TLI Treg. Mint V10. Would love it!. But so far, the gasser is doing fine. Would I like more touorque or power at times? Yes, of course. But I have what I have. I bought it "Certified" from Dealer, and also extended my warrantee to 100K. It brought the price pretty much up to the top of the range, but if there are any issues, I am covered.
I did ask about how towing would effect any warrentee service. He said no as long as I am within the ranges stated by the manual. If you look at the older CanAm video's, you see a driving test of all models using the same car - a Porsche Cayenne. It was at the Airstream Factory and test track.
Why did I not purchase a diesel truck or one with more power? Complicated answer. 1) this is our only vehicle. We split our time between FLorida and the road to Montana. Leaving a vehicle in storage thru FLorida summers is both expensive and hard on the vehicle. I suggested a very nice Ram 2500 diesel, and wife nixed it. She did not want to climb in and out of a high truck all the time. Noisey and trucky. As is known, the Treg is very comfortable car to drive. My Exec has all I would want, and she loves it. If it craps out, then I will go to something else. But so far, it seems really well set up for our Airstream.
One side note about the ProPride. This WD hitch is very expensive. I swapped out an Equalizer, and there is no comparison in my mind. Coming across Eastern Montana, it was blowing and gusting around 20-30 MPH. I never felt a thing, no sway what so ever, and the only thing I noticed is the car would often stay in 6th gear. I did not know it was blowing so hard until I pulled into a gas station and had it pointed downwind. The door almost ripped off.
As far as I can tell, this works well. Now, if I had one of those very light and flat sided trailers that are tall and sit high up, it might not work. As most of your know, Airstreams carries its weight very low and most between the axils. Not much top side weight. It also is as aerodynamic as trailers this size go.
so, I cant remember if I tried the hatch or not remotely. However, my backup camera deal shows a trailer back there when its plugged in. has the factory tow hitch, etc. and it is the Exec package so it SHOULD have every option and feature that was available at the time. But, next time I hook it up I will try that remote open...I THINK I have tried and wondered why it wouldn't open, but....I dont member exactly.The VWs have a trailer module that detects the trailer when it's lights are connected. This module changes the fueling and cooling parameters in the various CPS and needs to be working.
I bring this up because someone may not have the full setup for towing in your car.
How to tell you ask?
Well if the trailer is detected the rear hatch will not open remotely, you must use the handle latch on the rear.
Just an off chance that something is not correct in the trailer module. The module is part of the towing prep and the hitch is a separate entry in the build sheet.
The readout on the instrument panel is an approximation of the engine temp and what VW wants you to see, not the exact temp. The gauge is there to make you think about loading.
I tow a smaller 16' Scamp fiberglass trailer at about 3000 # s and the Touareg hardly knows it is back there.
I have the same model towing 20 foot van - on a long hill it will heat up if I don’t increase the revs. Don’t let it sit on 1500 revs…. I never tow in 8th gear.Hi, so we bought a '16 Touareg TDI Exec a bit over a year ago, and we absolutely love the thing. We bought it for the reason of towing, and this year we finally bought our travel trailer. its 21ft long, unloaded the trailer weights about 4300, hitch Is 480, and FULLY loaded its 5760, I would say we are rocking about 4500-4600 with stuff/food in it. Honestly tows it really well, don't feel like there is an issue (minus MURDERING MPG 30ish to about 12ish and DEF )
However, my question is this----I have noticed that when I go uphills it starts to get a lil hot, normally runs at 200deg, going up a hill, will go to 205, top the hill, back down to 200...next hill, 210, back down to 200....longer type bigger hill its gotten to 235, once I top the hill, drops fairly quickly to 200 again. I have noticed if I shift it manually I can try to control it a bit and it doesn't get as bad, but almost any hill its doing this.
I read a few other forums and someone said to clean the radiator with a hose and water get the gunk outta there, didn't help, made sure I had enough coolant, topped it off..no difference.
Anyone have this issue? or any ideas what could be causing it? the first time it happened I even got an "add oil" and I got SUPER worried, but, after adding in 1qt its been fine, levels are good. My garage is SUPER DUPER clean and I workout on it every day so I would notice if ANYTHING was leaking.
it has NEVER hit the red area, and once I top the hill, RIGHT back down....im concerned a bit, espeically since I am going to be towing the trailer from New Mexico to LA, Cali in July, and thats crossing Needles, Cali, which is like 115+ degrees in the summer. Also, I never had issues without the trailer, or in traffic or anything, only uphills.
that I do not. it is usually fine temp wise until the RPMs go up. If I use the manual shifting I can usually keep it under 3K it'll help, not all the time, but it helpsI have the same model towing 20 foot van - on a long hill it will heat up if I don’t increase the revs. Don’t let it sit on 1500 revs…. I never tow in 8th gear.