B2 fuel tank - Page 4

Flying Frank · 03-05-16, 08:31 PM

Quote:

Originally Posted by SE_30

La
Here's the video showing the fuel supply hose, note how slow the flow is . https://www.youtube.com/watch?v=tCpoZAE_x0w

Wow, thats an exciting 4 seconds worth!

Flying Frank · 03-05-16, 08:45 PM

When I was trying to sort out my 80 Sport ( 1984 vintage ) about 2 years ago now, I had all these sort of problems with my fuel tank. Main factor is that the Sport has a lower compartment inside the tank where the pick up pipe ( outflow) and the return pipes are located. Despite spending hours swilling fuel in and out of the tank you just cannot access the ends of the pipes. I ended up selling the whole project onto someone else and not sure where he has got to with the restoration.
However, I think that the ONLY realistic solution is to get a professional company to open up the tank, clean it thoroughly , including any filters etc, and then have it coated and resealed. I think any effort to seal an Audi tank will probably seal up the filter too. I sympathise with all you guys trying to do it as I remember only too well days of swilling fuel around that damned tank. Not my finest hour(s) for sure.

SE_30 · 04-05-16, 08:25 AM

Quote:

Originally Posted by Flying Frank

Wow, thats an exciting 4 seconds worth!

The next 5 hrs draining £50 worth of fuel don't show anything different..

Flying Frank · 04-05-16, 09:05 AM

Quote:

Originally Posted by SE_30

The next 5 hrs draining £50 worth of fuel don't show anything different..

I expect you felt really drained after that.....

willow · 06-05-16, 08:27 AM

Don't leave vinegar soaking in the tank, it takes off the coating on the inside of the tank. Things are worse now!

willow · 08-05-16, 08:36 PM

In the end, I had to ditch the b2 90 tank and fitted a modified b3 90 quattro tank. Internally, it was in better condition and had no fuel flow restriction through the internal gauze filter.

03-05-16, 08:45 PM	#32
Flying Frank 4 ring whore! Classic Audi Club Member Join Date: Dec 2012 Location: Kernow, Gods own county !! Posts: 2,388	When I was trying to sort out my 80 Sport ( 1984 vintage ) about 2 years ago now, I had all these sort of problems with my fuel tank. Main factor is that the Sport has a lower compartment inside the tank where the pick up pipe ( outflow) and the return pipes are located. Despite spending hours swilling fuel in and out of the tank you just cannot access the ends of the pipes. I ended up selling the whole project onto someone else and not sure where he has got to with the restoration. However, I think that the ONLY realistic solution is to get a professional company to open up the tank, clean it thoroughly , including any filters etc, and then have it coated and resealed. I think any effort to seal an Audi tank will probably seal up the filter too. I sympathise with all you guys trying to do it as I remember only too well days of swilling fuel around that damned tank. Not my finest hour(s) for sure.

06-05-16, 08:27 AM	#35
willow Grown up member Join Date: Feb 2014 Location: Kerry Ireland Posts: 163	Don't leave vinegar soaking in the tank, it takes off the coating on the inside of the tank. Things are worse now!

08-05-16, 08:36 PM	#36
willow Grown up member Join Date: Feb 2014 Location: Kerry Ireland Posts: 163	In the end, I had to ditch the b2 90 tank and fitted a modified b3 90 quattro tank. Internally, it was in better condition and had no fuel flow restriction through the internal gauze filter.