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VW Passat TDI

1030 messages,  Last post on Dec 05, 2008 at 8:09 AM

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What is this discussion about? Volkswagen Passat, Diesel, Sedan


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#961 of 1030
Re: Biodiesel [jimlockey] by mrjette
Dec 07, 2005 (3:00 am)
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Replying to: jimlockey (Dec 06, 2005 1:17 pm)

Why not?
#962 of 1030
Re: Biodiesel [mrjette] by jimlockey
Dec 08, 2005 (7:19 am)
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Replying to: mrjette (Dec 07, 2005 3:00 am)

Quality control and higher price.
#963 of 1030
Smell of Anti Freeze in 2005 Passat TDI by rbinder58
Dec 25, 2005 (1:25 pm)
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I have a 2005 Passat TDI and love the car, have some minor bucking issues but get over it by driving hard. The only issue I have that I cannot seem to remedy is the smell of anti freeze in the car upon hard turns , fast starts and initally turning on heat in the car. Had it back to the dealer for a defroster issue that was resolved buit nothing on the smell. I check the level regularly and have never had to add.
 
Any thoughts or anyone else have this issue???
#964 of 1030
Re: Smell of Anti Freeze in 2005 Passat TDI [rbinder58] by elias
Jan 10, 2006 (10:47 am)
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Replying to: rbinder58 (Dec 25, 2005 1:25 pm)

are you sure it's not the washer fluid that you are smelling? after i complained of same problem to the dealer, they reported that the "factory fill" washer fluid is quite stanky. sure enough, now that i've refilled the washer fluid a few times with cheapo non-VW fluid, i don't notice any stank after hard turns.
#965 of 1030
05 Passat / heater core by jimlockey
Jan 11, 2006 (11:54 am)
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I too have an 05 Passat TDI. My heater core had a leak and was replaced by my VW dealer. It is my understanding that VW had other VW's with bad heater cores.
#966 of 1030
Re: Another Shuddering Problem [stalban] by sschnath
Jan 19, 2006 (8:19 pm)
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Replying to: stalban (Dec 02, 2005 12:16 pm)

I experienced the same symptoms exactly. Problem started slow and got worse and worse. Steady acceleration made it appear. Kick down to a lower gear and higher RPMs or settle in to a steady speed and it smoothed out.
 
My TDI has 64K miles on it. I had changed the fuel filter at around 50K. Dealer thought it might be the fuel filter but that didn't make sense to me since at higher RPMs the problem went away - I would expect it to be even worse if it was the fuel filter starving the engine. They checked it anyway and while the measured flow at the cylinders was off a little, it turned out to be a very dirty EGR valve.
 
I asked the tech if this is going to be a chronic problem and should I have the cleaning performed routinely at a certain mileage. He was honest and said I might never have the problem again. Thing is, they all get dirty - that's the nature of the fuel - but apparently that doesn't mean we're all going to have the problem. Apparently the valve got dirty in a way that caused it to stick. Perhaps a piece of carbon stuck on the valve and it was kept from opening and closing correctly.
 
This is the second time the tech had seen this problem - the first one had your mileage (do you live in NH?). Based on his experience and your mileage (assuming you're having the same issue), he's right - it doesn't appear to be mileage-related.
 
It's possible that fuel contributed to the problem. I had to change gas stations for a time while my regular station was undergoing tank maintenance and this was right after I changed my fuel filter. In the previous 18 months I had the car before changing stations, I never had this problem. So, it's tempting to blame it on them but it could be coincidental. No way to know.
 
I'm back using the previous dealer again so hopefully I won't see this again. But, a recommendation to everyone: dealer charged me $45 to look at the fuel filter. If you're not due for a filter and you're having this problem, ask them to check the EGR first. As it was, the whole thing set me back $221. I had them change the fuel filter since it was close anyway. But the labor to clean the valve was around $100. I thought diesels were supposed to be less expensive to run?!
 
Anyone know of any sort of additive that would help avoid this problem?
#967 of 1030
Re: Another Shuddering Problem [sschnath] by mrjette
Jan 20, 2006 (3:21 am)
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Replying to: sschnath (Jan 19, 2006 8:19 pm)

My understanding is that the best preventative measure is "hard acceleration" - like once a tank full. Pick a clear and safe area, and stomp on the fuel peddle. Let the RPMs get higher than normal, and much of the soot is blown clear of the engine and thus the EGR valve.
 
I'm sorry officer, I HAD to do it....
#968 of 1030
Re: Biodiesel [jimlockey] by lidar_guru
Feb 02, 2006 (9:54 am)
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Replying to: jimlockey (Dec 08, 2005 7:19 am)

I inquired at my VW dealer wether I should put in Bio or stick to Dino Diesel and I was informed that VW Canada has advised people not to use any greater concentrations greater than B5, in other words no B20. It apperars that greater concentrations cause premature fuel pump and associated component failures. Total cost of replacement is 3000$ CDN. Yikes.
 
Next time I'm at the dealer I'll try to get a copy of the bulletin and post it on this forum. I'll wait and see before I put in BioDiesel in my 05 Wagon. Too bad because I'm a tree hugger...
#969 of 1030
Re: Biodiesel [lidar_guru] by sebring95
Feb 02, 2006 (10:46 am)
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Replying to: lidar_guru (Feb 02, 2006 9:54 am)

I don't think it's so much a problem with the biodiesel itself, it's a matter of getting GOOD biodiesel. There are few standards at the moment and quality seems to be hit/miss. 5% of bad biodiesel wouldn't hurt anything, but 20% could. The main objective is to find a GOOD source and B100 shouldn't be a problem.
#970 of 1030
Re: Smell of Anti Freeze in 2005 Passat TDI [rbinder58] by emerls1120
Feb 09, 2006 (5:02 am)
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Replying to: rbinder58 (Dec 25, 2005 1:25 pm)

I have 19 month old 2004 Passat TDI. It has been in the dealership for the last 6 weeks. They discovered antifreeze inside my gauges, under the carpet and more places. There is a tech bulletin out because what has happened, in my case, is that the sensor built into the antifreeze reservoir was made with a crack in it. This crack allows antifreeze to reach the sensor and then, hold on to something, it gets inside the wires. I mean under the insulation around the wire!!! It travels the whole wiring harness and gets to the following items:
1. The accelerator module (your gas pedal electronics)
2. In your gauges (they have to replace them all)
3. Your wiring harnesses (all of them under the hood have to be "cut out and overlayed")
4. The interior carpeting must be replaced because it pools under the carpet.
My situation is not great. I have 60,000 miles on my 19 month old TDI so VW is saying it is out warranty. The bill is $4,375 to fix it all.
I would have them check this.

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