pfenlon Posted August 15, 2020 Report Share Posted August 15, 2020 I have a couple of pin holes in my fuel tank, will POR15 cure this, or is there a better product. tank is out of the car, so easy to swirl the stuff about. Or if someone has a good TR4 tank I would be glad to hear from them. Quote Link to post Share on other sites
Ian Vincent Posted August 15, 2020 Report Share Posted August 15, 2020 Hi Pete, I used Frost's tank slosh treatment - it worked for me and I just sprayed the outside with black cellulose. Rgds Ian Quote Link to post Share on other sites
ed_h Posted August 15, 2020 Report Share Posted August 15, 2020 IMO, a better repair would be with solder from the outside of the tank. Many people, including me, consider an internal tank sealer as a last resort to save an otherwise unrepairable tank. Sealers, like many other coatings, depend heavily on surface preparation for good adhesion. Adequate surface prep can be very difficult inside a closed space, especially since you can't see many inside areas. If a sealer fails, and they sometimes do, you're actually in a worse position than before the sealer, since your repair options are more limited. Ed Quote Link to post Share on other sites
Rodbr Posted August 15, 2020 Report Share Posted August 15, 2020 Hi pete, Plus 1 for what Ed said and If you have one or two pinholes that are leaking you can bet that there will be more just lurking below the surface. Sloshing round may dislodge more and you end up chasing your tail. I would firstly beg borrow an endoscope and have a real good look at the inside of the tank and make a judgement thereafter. For a good seal you really have to get the surface as clean as possible, using abrasive materials which in turn loosens the rust scale and exposes more holes. It really depends on what quality restoration your are doing! Rod Quote Link to post Share on other sites
ianc Posted August 17, 2020 Report Share Posted August 17, 2020 I would agree that Sloshing is NOT the answer to pinholes, for the reasons explained above. If there are pinholes already, you can bet that more will follow! In 1997, my oversize (18 gallon), steel tank was in good condition apart from the shedding of fine particles into the petrol and thence to the pump. Sloshing sealed the internal surface and all has been well for the past 23 years. Ian Cornish Quote Link to post Share on other sites
RogerH Posted August 17, 2020 Report Share Posted August 17, 2020 On 8/15/2020 at 3:49 PM, ed_h said: IMO, a better repair would be with solder from the outside of the tank. Many people, including me, consider an internal tank sealer as a last resort to save an otherwise unrepairable tank. Sealers, like many other coatings, depend heavily on surface preparation for good adhesion. Adequate surface prep can be very difficult inside a closed space, especially since you can't see many inside areas. If a sealer fails, and they sometimes do, you're actually in a worse position than before the sealer, since your repair options are more limited. Ed I go along with Ed - external soldering. Make sure that ALL the internal AND external rust is removed. Tin the surface first and then apply a reasonable thickness of solder. You do not even have to paint it afterwards. Roger Quote Link to post Share on other sites
ed_h Posted August 17, 2020 Report Share Posted August 17, 2020 I suppose there are several failure modes, but on my TR6 tank. The pitting that led to the pin holes was all on the OUTSIDE of the tank. Ed Quote Link to post Share on other sites
harrytr5 Posted August 17, 2020 Report Share Posted August 17, 2020 Pete I have a TR4 petrol tank on ebay. I bought a new one as that is my want. Regards Harry Quote Link to post Share on other sites
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