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Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW MKVII-Mk7 Golf family including Golf Wagon (~ 2015 +)

VW MKVII-Mk7 Golf family including Golf Wagon (~ 2015 +) Discussions area for the Mk7 (2015+) Golf and Golf Wagon TDIs based on the MQB (Modularer Querbaukasten) platform.

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Old February 26th, 2020, 15:06   #1
krp312
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Default Is it a bad idea to perform a diesel purge?

Greetings,


I want to perform a diesel purge on my Golf (CRUA engine), but I haven't found much info on it. But I've found lots of info for older engines, like this.


I'm a novice. Because I haven't seen it covered a lot for the MK7, I'm worried. Is it safe for me to proceed with the purge?


Many thanks in advance.
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Old February 26th, 2020, 15:14   #2
kdawg89
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I don't have any specific reason why it is a bad idea. I wouldn't do it though.
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Old February 26th, 2020, 15:53   #3
nayr
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just run a can of BG245 through it and you'll get same if not better results.
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Old February 26th, 2020, 16:52   #4
krp312
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Quote:
Originally Posted by nayr View Post
just run a can of BG245 through it and you'll get same if not better results.

Did you have to connect the supply and return ports of the filter like this (timestamp at approx. 5m)?


EDIT: Added some words.

Last edited by krp312; February 26th, 2020 at 18:01.
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Old February 26th, 2020, 18:25   #5
nayr
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no mucking w/fuel lines, just pour it into the tank every 20k miles or so, works best if you burn that tank up on cold starts and city driving so it can do its work on emissions gear during warm up.. supposed to clean up deposits from fuel system to exhaust system, so recirculating it through EGR should help with that stuff.

I regularly treat my fuel but last winter I was idling at a park eating my lunch and the vehicle stuttered so hard I thought someone hit me.. it did it a few more times and I figured it was just a rough regen (tho why would it start a regen parked?).. but then I noticed it'd do it every time I was idling for any time, definitely not regening... ran that through (~60k mi) and it was gone before the full 25g tank was burned up, and ran better than it had in any winter I had driven it.. used a full bottle on my 3L tank, probably could get 2+ tanks on a 2L or one very concentrated tank.

Lots of Euro Diesel shops use BG245 as normal service regularly, not sure what magic is in the bottle but I've poured all sorts of things into my fuel tank over the last few decades and BG245 is the only one I'm certain that works and could almost immediately notice the difference.. now I try to run it through a tank or two before every filter change.
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Last edited by nayr; February 26th, 2020 at 18:35.
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Old February 27th, 2020, 05:37   #6
krp312
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nayr, thanks so much for your tips, and that sounds pretty scary to have felt that strong of a stutter.

Just for anyone else finding this post in the future, I'll add that I spoke to my local mechanic. He said that due to a disparity in pressure, it wouldn't be a good idea to run LiquiMoly Diesel Purge straight into the fuel line on an MK7. It's acceptable on the older engines though. Instead, he strongly recommended to top off the fuel filter (or remove fuel from the filter, and then top off). And put the rest in the tank.

I'm just a novice, but he seems to know a lot about TDIs.

If I can determine any worthwhile changes after the treatment, I'll follow up here.

Last edited by krp312; February 27th, 2020 at 05:38. Reason: Formatting
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Old February 27th, 2020, 06:50   #7
740GLE
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I find pouring diesel purge directly on the garage floor in homage to my crushed 2010 Jetta results in the best performance.

Dilution of diesel purge in a semi full tank is hardly going to be noticeable, I'd much rather find good fuel and run that even if it costs a few cents more.
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Old March 4th, 2020, 11:55   #8
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After driving for about a week, I'm observing what appears to be a 3-5 mpg increase, and less "kick" during cold starts. It's important to note, however, that I applied the Diesel Purge product and changed my fuel filter, so I'm not totally sure which actions resulted in better mileage.
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Old March 5th, 2020, 05:01   #9
740GLE
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Or the temps in the Northeast have been really spring like in the past 1-2 weeks. 50-60 the other day.
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Old March 6th, 2020, 16:50   #10
Discovery
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When I replace my fuel filter, I top it up with diesel purge before screwing it buck up.
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