BRDM Driver Posted June 9, 2015 Share Posted June 9, 2015 I have found a pinhole in my BRDM fuel tank. The outside of the tank looks as new, but there is rust inside. Is there a quick way to patch the pinhole, while I source a suitable replacement... Cheers! Quote Link to comment Share on other sites More sharing options...
sirhc Posted June 9, 2015 Share Posted June 9, 2015 Try this: http://www.frost.co.uk/brands/por15/por15-tank-sealer-946ml.html I have used it a few times with good results. Quote Link to comment Share on other sites More sharing options...
Tony B Posted June 9, 2015 Share Posted June 9, 2015 I've used Petro patch many times over the years. It consists of a cloth which you impregnate with a grey goo. Never had a failure with it. I've used aluminium mesh or a wrapped it around a selftap screw for larger holes. Then add a second layer over the screw head. Quote Link to comment Share on other sites More sharing options...
eddy8men Posted June 9, 2015 Share Posted June 9, 2015 I think we all get too caught up with all this new technology and forget the old ways. if it's a pinhole just solder it ! Quote Link to comment Share on other sites More sharing options...
MatchFuzee Posted June 9, 2015 Share Posted June 9, 2015 This link may interest you:- http://pub25.bravenet.com/forum/static/show.php?usernum=2099944454&frmid=5&msgid=985696&cmd=show Quote Link to comment Share on other sites More sharing options...
paulob1 Posted June 10, 2015 Share Posted June 10, 2015 I sprayed the inside of a tank with hamerite petrol resistant paint and it has been leak free for over 10 years... soldering works too... Quote Link to comment Share on other sites More sharing options...
BRDM Driver Posted June 10, 2015 Author Share Posted June 10, 2015 Well I just tumbled my tank with a load of M16 bolts! There's a lot of rust in there... I then found a total of three holes! I fixed them by opening them up with a centre punch to create a bit of material to cut a thread into. Then screwed in an M5 copper plated screw. Soldered it with some plumbers flux and an ordinary electronics iron (I didn't think this would work but it worked really well!) Pretty sure that this tank is on the way out so I'll look at replacing it with a much smaller plastic tank. Maybe something I can take out easily... I was looking at a boat fuel tank but I think these are illegal to use in road vehicles. I may go for a small alloy racing tank. Quote Link to comment Share on other sites More sharing options...
Tony B Posted June 10, 2015 Share Posted June 10, 2015 Try a fuel tank from a Land Rover Discovery. There plastic with a decent capacity. Quote Link to comment Share on other sites More sharing options...
BRDM Driver Posted June 10, 2015 Author Share Posted June 10, 2015 Try a fuel tank from a Land Rover Discovery. There plastic with a decent capacity. That's a great idea! They are square tanks, just like the BRDM tank and I get an electric fuel pump too! The mechanical fuel pump is another weak point on BRDM. Not sure about adapting the fuel fittings though. Disco tanks appear to be around £70 on ebay. Quote Link to comment Share on other sites More sharing options...
Tony B Posted June 11, 2015 Share Posted June 11, 2015 That's a great idea! They are square tanks, just like the BRDM tank and I get an electric fuel pump too! The mechanical fuel pump is another weak point on BRDM. Not sure about adapting the fuel fittings though. Disco tanks appear to be around £70 on ebay. Or cheaper if you get a take out one. 200 and 300 Discos rot around the back floor so not a difficult job! Quote Link to comment Share on other sites More sharing options...
LarryH57 Posted June 15, 2015 Share Posted June 15, 2015 Other owners have araldited a penny over the hole and that's worked equally well apparently for years! As for soldering or welding a tank I'm not sure that's a good idea if it still has traces of fuel in it- you would need to wash the tank out a few times to make sure no vapours are present. Quote Link to comment Share on other sites More sharing options...
paulob1 Posted June 16, 2015 Share Posted June 16, 2015 yes you certainly need to wash it out, I recommend using a good strong soapy solution first then wash it with clean water and finally allow it to dry using a hair dryer....will clear it out completely...and make its safe, your nose is not a bad way to check for fumes...also rolling a chain in the tank when your doing the washing will help remove any fuel impregnated rust spots, which can remain if your not careful... Quote Link to comment Share on other sites More sharing options...
AlienFTM Posted June 20, 2015 Share Posted June 20, 2015 Other owners have araldited a penny over the hole and that's worked equally well apparently for years! As for soldering or welding a tank I'm not sure that's a good idea if it still has traces of fuel in it- you would need to wash the tank out a few times to make sure no vapours are present. After my father in law died a couple of years ago, I learned that he had been instrumental in getting the Fairey Delta 2 to the start of her legendary record-breaking flight, having been up all night at Boscombe Down sloshing epoxy resin about to seal leaks in the fuel tanks. Sadly this is all I know, and 60 years on I doubt I'll ever know any more. Quote Link to comment Share on other sites More sharing options...
AmmoMan Posted June 22, 2015 Share Posted June 22, 2015 Sealed mine last year with POR15 after welding up the major holes and it's holding out so far. Quote Link to comment Share on other sites More sharing options...
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