VW T6 & T6.1 motor SCANDAL not yet coming out!

[OooOooTheMonkey]

Would this still be an issue on 2023/2024 vans? Whats the best way to avoid this? Avoid cheap supermarket fuel? Preventatively replace the HPFP every 5 years?

 

[Webbah_in_Switzerland]

Would this still be an issue on 2023/2024 vans? Whats the best way to avoid this? Avoid cheap supermarket fuel? Preventatively replace the HPFP every 5 years?

Been thinking along the same lines myself. I personally avoid Bio Diesel as much as possible and always go for the larger brands like Shell, Avia, Eni, etc. I have also been using Diesel cleaning additives every 4 tanks since new (STP). So far my engine is purring like a kitten.

 

[Flower Power]

Webbah, which product do you use exactly? Amazon showed me several options in STP additives, cleaners, fuel, injectors...???

 

[Webbah_in_Switzerland]

Webbah, which product do you use exactly? Amazon showed me several options in STP additives, cleaners, fuel, injectors...???

This is the one I use when I can find it:

Universal Kraftstoffanlagen-Reiniger Diesel | STP®

Der STP® Universal Kraftstoffanlagen-Reiniger Diesel verhilft Ihrem Auto zur alten Leistung. Schützt die Kraftstoffanlage, kann Emissionen senken und die Laufkultur verbessern. Mehr dazu.

www.stp.com

And this is the one that is more readily available at most gas stations that I use if I don't have any with me:

Dieselzusatz | STP®

STP® Dieselzusatz reinigt das Kraftstoffsystem, senkt den Verbrauch und sorgt dafür, dass Ihr Motor das ganze Jahr über problemlos anspringt.

www.stp.com

Sorry it's in German but the same products are available worldwide

 

[Webbah_in_Switzerland]

This is the one I use when I can find it:

Universal Kraftstoffanlagen-Reiniger Diesel | STP®

Der STP® Universal Kraftstoffanlagen-Reiniger Diesel verhilft Ihrem Auto zur alten Leistung. Schützt die Kraftstoffanlage, kann Emissionen senken und die Laufkultur verbessern. Mehr dazu.

www.stp.com

And this is the one that is more readily available at most gas stations that I use if I don't have any with me:

Dieselzusatz | STP®

STP® Dieselzusatz reinigt das Kraftstoffsystem, senkt den Verbrauch und sorgt dafür, dass Ihr Motor das ganze Jahr über problemlos anspringt.

www.stp.com

Sorry it's in German but the same products are available worldwide

Here in English:

Complete Fuel System Cleaner - Diesel | STP®

Restore performance to your vehicle with STP® Complete Fuel System Cleaner for Diesel. Protect your vehicles fuel systems, reduce emissions, and prevent engine hesitation. Find out more.

www.stp.com

Diesel Treatment | STP®

STP® Diesel Treatment effectively cleans your vehicles fuel intake, helping reduce fuel consumption and keeping your machine starting smoothly all year round.

www.stp.com

 

[Ch1pbutty]

Webbah, which product do you use exactly? Amazon showed me several options in STP additives, cleaners, fuel, injectors...???

Rhino is also good

 

[Webbah_in_Switzerland]

Rhino is also good

Yeah, LiquiMoly also sells a good product. Point is to use something is better than nothing....

 

[secret lemonade drinker]

I use redex diesel injector cleaner, 1 shot every tank (80 litres), beach had done 56400 miles up to last week when I traded her in, never missed a beat, same with smart diesel, 1/4 shot every tank (30 litres), 100k miles and still going

 

[yossarian]

Whats the best way to avoid this?

An aftermarket fuel filter might help.

 

[andyinluton]

An aftermarket fuel filter might help.

Trouble is the filter needs to be on the output side of the pump which is high pressure, the existing filters are between the tank & pump on the low pressure side & designed to catch any sediment that comes from the tank.

 

[SBswiss]

Yeah, LiquiMoly also sells a good product. Point is to use something is better than nothing....

Maybe it could have helped.
I wonder if the people who have the same problem have added something in the tank.
I did a service every 12 months at my VW garage so I hoped that this was enough to keep the engine in a good state. They unfortunately never told me to ad anything in the Diesel tank.

 

[Peter84]

They unfortunately never told me to ad anything in the Diesel tank.

I wonder if it's ever been scientifically proven that all these additives actually prevent anything. Never used them myself either.

 

[WelshGas]

I wonder if it's ever been scientifically proven that all these additives actually prevent anything. Never used them myself either.

Only by the companies that make/sell them.
135,000 miles in 9 + years using standard diesel and no 3rd party additives.

 

[Webbah_in_Switzerland]

Only by the companies that make/sell them.
135,000 miles in 9 + years using standard diesel and no 3rd party additives.

With a snorkel I can certainly hear my motor more. I had some popping and choking sounds when using Diesel in Italy. Used a bottle of STP and it cleared right up. So I can say from experience higher cetanes and cleaning agents does help in situations where you might have more bio diesel mixes or poor quality.


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[pluc99]

Many of the instances of this problem that I found googling seem to be from Switzerland. I wonder if the additives we use prevent diesel from freezing in winter may be a contributing factor.

 

[TripleBee]

I hardly ever refuel at big brands.
I might do an occasional fill up at Total (they offer 3 weeks of road assistance when refuelling there for at least 25 liters). For the rest, I only refuel at the lowest price I see (Intermarché, Leclerc, Super U, Carrefour in France, Gabriëls in Belgium).
I have (luckily) never encountered any problems in the 14 years and almost 200000km of ownership.
Oh, and I only refueled once in Switzerland, after I forgot that the diesel price is much higher there than in France. But that was back in 2010. Never had any issues either.

 

[Corradobrit]

I hardly ever refuel at big brands.
I might do an occasional fill up at Total (they offer 3 weeks of road assistance when refuelling there for at least 25 liters). For the rest, I only refuel at the lowest price I see (Intermarché, Leclerc, Super U, Carrefour in France, Gabriëls in Belgium).
I have (luckily) never encountered any problems in the 14 years and almost 200000km of ownership.
Oh, and I only refueled once in Switzerland, after I forgot that the diesel price is much higher there than in France. But that was back in 2010. Never had any issues either.

France gets most of its crude oil from North African countries like Libya and Algeria. Oil sourced from there is considered some of the best available due to the low sulphur content. Every little helps.

 

[LemonDrop]

Reading this is freaking me out a bit. Our beach hasn’t started first time a couple of times since we’ve had it (from new; 2019) which I put down to the battery needing a charge and/or cold weather. When should I be worried?

 

[B J G]

Many of the instances of this problem that I found googling seem to be from Switzerland. I wonder if the additives we use prevent diesel from freezing in winter may be a contributing factor.

In the UK Diesel has antifreezing additives during the winter months, possibly less than in your area.

 

[WelshGas]

Reading this is freaking me out a bit. Our beach hasn’t started first time a couple of times since we’ve had it (from new; 2019) which I put down to the battery needing a charge and/or cold weather. When should I be worried?

This problem with the HPPF pump certainly isn't a major topic on the T6 forum.

 

[SBswiss]

This problem with the HPPF pump certainly isn't a major topic on the T6 forum.

It seems like it started here in winter 2023 so let’s see in winter 2024 if more vans have the problem. And let’s hope it’s a minus topic .

For now, our van is starting fine again, but we have just come back from the south of France where it was 34 degrees, so I think the motor was hot enough not to have this issue. I’ll keep you posted how this story evolves and what VW do to help.

 

[TripleBee]

It seems like it started here in winter 2023 so let’s see in winter 2024 if more vans have the problem. And let’s hope it’s a minus topic .

For now, our van is starting fine again, but we have just come back from the south of France where it was 34 degrees, so I think the motor was hot enough not to have this issue. I’ll keep you posted how this story evolves and what VW do to help.

Well, if your engine runs fine on fuels from other countries, then the problem will be in Swiss fuel. Then this has nothing to do with VW.
Also, on my fuel lid it states not for Bio diesel. Too bad I can only buy B7 (maximum of 7% bio fuel). I want to have the freedom to fuel non bio diesel.
Maybe in Switzerland they have more bio in the diesel?

 

[KevH]

Well, if your engine runs fine on fuels from other countries, then the problem will be in Swiss fuel. Then this has nothing to do with VW.

Exactly my thoughts, particularly as the problem only arose last winter and the Swiss add winter additives.
May well be the same issue arising across other engine manufacturers not just VW.
I can release my clenched buttocks over this story now I think.

 

[KevH]

Also, on my fuel lid it states not for Bio diesel. Too bad I can only buy B7 (maximum of 7% bio fuel). I want to have the freedom to fuel non bio diesel.

Yes, I have the crossed out bio diesel sticker too, but all uk diesel appears to be 7% bio.
Caught between a rock and a hard place.

 

[Webbah_in_Switzerland]

Exactly my thoughts, particularly as the problem only arose last winter and the Swiss add winter additives.
May well be the same issue arising across other engine manufacturers not just VW.
I can release my clenched buttocks over this story now I think.

Nordic countries also use additives and sometimes higher concentrations so one would assume the issue would appear there as well if this were the case. Worthy of further investigation!


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