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25-08-18, 04:43 PM | #1 | |
Grown up member
Classic Audi Club Member
Join Date: Nov 2007
Posts: 825
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Fuel tank advice
Hi all,
Wonder if anyone can assist... Just been under the 80 as an MOT is looming and discovered a fuel leak from the fuel return line where it meets the tank. On closer inspection and when trying to remove the line, low and behold the bloody thing snapped off in my hand.... Couple of questions really, is there any issues with buying a used tank off someone, is it a case of just running some clean fuel through the tank to ensure it’s clean? Are the coupe tanks the same as the saloon ones - 1985 Audi 80 B2 - non Quattro? Ideally I’d rather have mine repaired if at all possible, but due to it being corrosion and a feed line actually shearing off I’m not sure it will be possible. Any help greatly appreciated, Simon Ps. Anyone have one spare they want to offload? |
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25-08-18, 08:10 PM | #2 |
Grown up member
Classic Audi Club Member
Join Date: Dec 2010
Location: Bingley
Posts: 634
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You could do a temp repair with something like this
https://www.granvilleoil.com/techDat...hData?ptdID=76 I have used this and similar epoxy products (some of which include a cloth material) to repair motorcycle tanks in the past and the repairs have been sucessful (as in one is still going strong after 18 years). |
26-08-18, 12:30 PM | #3 |
4 ring whore!
Classic Audi Club Member
Join Date: Nov 2007
Location: Polmont
Posts: 2,617
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Is yours a carb as there is a difference from the injection models.
It's also different from the Coupe
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1991 90 quattro 20v sport 1991 90 quattro |
26-08-18, 07:49 PM | #4 | ||
Grown up member
Classic Audi Club Member
Join Date: Nov 2007
Posts: 825
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Quote:
Quote:
I may have found somewhere in Hartlepool who can mend it, sent some pictures of the damage off so awaiting a reply, might end up in a long drive but at least it would sort the issue. |
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26-08-18, 10:06 PM | #5 |
4 ring whore!
Classic Audi Club Member
Join Date: Nov 2007
Location: Polmont
Posts: 2,617
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I've only had a quick look at part numbers to check so don't what the differences are
Coupe uses a different part number entirely and the injection model has a different letter at the end. There's one on German Ebay who will ship over here https://www.ebay.co.uk/itm/Petrol-Fu...temCondition=4
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1991 90 quattro 20v sport 1991 90 quattro |
27-08-18, 08:40 AM | #6 |
Ex Member
Classic Audi Club Member
Join Date: Dec 2007
Posts: 5,565
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You could likely solder repair a new outlet pipe to repair the issue.
Ive welded tanks in the past but you have to ensure its clear of any liquid fuel and vapours. I did it by removing the sender unit and drying the interior of the tank with a vacuum cleaner on blow then washing it out with detergent drying it again then filling the tank with argon. |
27-08-18, 08:57 AM | #7 |
4 ring whore!
Classic Audi Club Member
Join Date: Aug 2015
Location: Dalgety Bay, Fife
Posts: 2,078
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Slightly off topic but this 4v6’s post reminded me of the old tale about the boy who tried to hoover the fumes out of a tank for welding and accidentally re-invented the jet engine
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27-08-18, 02:53 PM | #8 | |
4 ring whore!
Classic Audi Club Member
Join Date: Jan 2010
Location: Where a spike points skywards
Posts: 12,960
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Quote:
Problem is that welds corrode after a while, brazing is a better option but that can buckle the tank due to heat dispersal around the repair. |
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