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Takes Forever to Heat up 2012 TDI

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Thielios

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Discussion starter · #1 ·
Hey all,
I have a 2012 TDI. Winter has hit in the chicago area and it seems that the Touareg takes forever to get to full operating temp. I do get heat thanks to what must be some sort of electronic heater but the cars coolant takes way too long to get to 200.

For Example My drive to work is 8.5 miles. At times I am going 60 miles per hour but usually average about 24 mph on the whole trip.

The trip takes me about 20 mins. I park in an attached garage and it was about 20 degrees outside this morning.

After driving all the way to work my coolant still only registered 175 degrees. Is this normal? Should it take 25 mins to get to full operating temp or could a thermostat be bad? Any advice or personal experience you could share is appreciated.

-Brian
 
#2 ·
Set both heat controls to HI so the electronic heater is working.

It's mentioned previously here in the forums a couple times about the heater taking a while to heat up.
 
Discussion starter · #3 ·
Yes I have seen that on here. I have heat relatively quickly. I am more concerned about the fact that it takes the coolant about 25 mins to get to full operating temp. My gas mileage goes way down when the car is warming up.

I have a 03 passat that gets to full temp in about 5 mins which is why it seems weird.
 
#4 ·
ts normal for diesels to warm up slowly...this is natural since the whole combustion process means cooler temps vs. a spark fired gasoline engine.

there is no way your coolant will get to full temp on an 8.5 mile run.

Also note that diesels do not warm up at idle. so if much of that commute is idling along in stop and go it'll even take longer to warm up.
 
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#5 ·
FWIW, my Touareg takes only slightly more time for the engine to reach operating temperature than my previous V8 Genesis (about 1/4 mile farther on the Interstate after leaving work with cold soaked engine). I reach full temp in about 2 miles being gentle on the throttle.

I was expecting it to take longer for the cabin to heat than what it does. Overall, I am pleased.

That said, winters in TN are nothing compared to Chicago.
 
Discussion starter · #6 ·
bnajack,
If I read your post correctly, you are stating that your TDI touareg only takes about 2 miles to heat up to full operating temp? Even when it was like 45-50 degrees outside here and like 55-60 in the garage it would take 8.5 miles to heat up all the way.

-Brian
 
#7 · (Edited)
It is normal. I drive to work about 3.5 miles in the 30MPH zone with 8 (?)stop-lights and 2/3 of the trip with bumper-to-bumper traffic (so my average speed would be much less than yours). It has to be above freezing outside so I’ll reach my destination with the engine at an optimal temp of 200F. Yes, the mileage sucks on trips like that. Sure, you can read here on the CT that some folks are averaging 28MPG in the city. I laugh reading many of these posts - their unconscious but a very obvious goal: I’ve got better Touareg than you do! The city cycle of one guy’s Touareg is very different from the city cycle of the other guy’s Touareg. When it gets teens below zero, I can have my work trip MPG at ~18 or even less vs. about ~22-23 in summer months. And, speaking about Passat, the shier superiority in mass of the Touareg engine simply demands more time to warm up this bigger piece of metal.

P.S. And diesel engines do warm up during idling, perhaps at a slower rate than their gasoline brethren.:D
 
#8 ·
Thielios said:
bnajack,
If I read your post correctly, you are stating that your TDI touareg only takes about 2 miles to heat up to full operating temp? Even when it was like 45-50 degrees outside here and like 55-60 in the garage it would take 8.5 miles to heat up all the way.

-Brian
Click to expand...
Right. The weather here has been about 25-30 degrees in the morning when I leave for work. My car is garage kept. I drive about a mile through the neighborhood to the Interstate and about 1-2 miles on the Interstate when I note the pointer on the gauge reads vertical. (I forgot the number, 200 I think). As I mentioned, I am gentle with throttle until it gets to temp.

In the afternoon after sitting all day (I do not drive to lunch) I drive about two miles and it is at operating temp. At that time of day, it is usually about 45 degrees.

My Hyundai Genesis was about the same.
 
#10 ·
To all of the short commuters commenting...have any of you even thought about your oil temps? It does take oil a lot longer to heat up to operating temperature. What is that doing to your engine on these 8-10 mile trips where the water temp barely gets hot?
 
#11 ·
ConservativeConsumer said:
P.S. And diesel engines do warm up during idling, perhaps at a slower rate than their gasoline brethren.:D
Click to expand...
They do somewhat, perhaps its more accurate to say don't bother starting it and expecting to walk out to a warm and toasty vehicle in 10 minutes when its -20 outside.

FWIW the PD TDIs would actually COOL DOWN in stop and go traffic..the heater core would allow enough heat to be removed from the engine that you would lose temp...sucks when its -20 out and you are loosing heat from a running engine.
 
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#13 ·
Not a strange question at all.

What he's saying is that short journies aren't good for your car. Go to work the long way round . . . as long as it's about 20 miles!:D
 
#14 ·
Yes, i was surprised no one had mentioned how bad short, cold drives are for the engine. There have been a couple of postings, perhaps more, saying that not getting both oil & coolant up to op temp will be costly down the road.
 
#15 ·
My house is from.the town about 6 miles and the car heats up to 90°C for about 3 miles, considering and that i leave it about 2 min on idle. Also when it gets to 90°C it takes more than four hours to completely cool down.. And the temperature outside, this days is about -2 to 5 °C..
 
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#17 · (Edited)
Just tested this out on the way home. Here are the conditions (this part is extremely important, things will change with these variables):
- Treg was sitting outside all day
- temp was just above freezing.
- Office is 100 yards away from freeway onramp, so basically no time at low speeds
-left the office late so freeway was wide open, got on the onramp and did approx 70-75mph steady the whole time.

Results:

-water temp hits full operating temp in 7 minutes
-oil temp hits full operating temp in 10 mins.

pics or it didn't happen attached:
pic 1 was when it just flipped to 7 min, not fully warmed up
pic 2 was around 45 secs or so after pic 1, now water is warm
pic 3 taken at 9 min point, oil not fully warm
pic 4 shows oil at full temp.
 
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#19 ·
Do they sell electric heating coils/dipsticks that can inserted somewhere into the radiator or coolant lines for a gas engine? Is there a gas version Webasto? Or electric version? I know they have them for Fords and Dodges.
 
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