DPF ash load upper limit for Q7 TDI?

gdorris

Well-known member
Joined
Dec 8, 2007
Location
Olympia, WA
TDI
05 Jetta GLS Wagon TDI, 96 B4V TDI (74K mi.) for sale
I just bought a 2011 Q7 TDI and asked for a ash load reading before I bought it because it had 125K mi. The tech did not know the difference between ash load and soot. My VCDS shows .26 l (260 ml) ash loading but I can not find out what the max limit is.
Thanks
 

oilhammer

Certified Volkswagen Nut & Vendor
Joined
Dec 11, 2001
Location
outside St Louis, MO
TDI
There are just too many to list....
I'm not sure anyone really knows, at this point. I have a rule-of-thumb for what I expect to see on the 4 cyl cars, but not enough V6s to draw any good data yet.

At 125k miles, 260 mL would be about DOUBLE what I'd expect to see on a 4 cyl car, FWIW. So, given you don't have a 4.0L 8cyl, but a 3.0L 6cyl, if we apply the same math we'd expect to see around 180-200?

But again, I may be way off on that.
 

gdorris

Well-known member
Joined
Dec 8, 2007
Location
Olympia, WA
TDI
05 Jetta GLS Wagon TDI, 96 B4V TDI (74K mi.) for sale
Thanks, OH. Your educated guess is more than I have gotten from the dealer

I'm not sure anyone really knows, at this point. I have a rule-of-thumb for what I expect to see on the 4 cyl cars, but not enough V6s to draw any good data yet.

At 125k miles, 260 mL would be about DOUBLE what I'd expect to see on a 4 cyl car, FWIW. So, given you don't have a 4.0L 8cyl, but a 3.0L 6cyl, if we apply the same math we'd expect to see around 180-200?

But again, I may be way off on that.
 
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