[Tigers] Gas Tanks & Connector Pipes Leakage Testing

[Donald S Antilla]

I used the toilet paper technique when I was trying to find the source of a water seepage into a Doppler Navigation Radar on a USAF HH-53B helicopter. Did that back in about 1969. It worked well; found the leakage path.

From: Tigers <tigers-bounces at autox.team.net> on behalf of Joe Brown <jbbrown1980 at gmail.com>
Date: Sunday, August 24, 2025 at 3:05 PM
To: Gary Winblad <winbladgary at gmail.com>
Cc: Tiger's List <tigers at autox.team.net>
Subject: Re: [Tigers] Gas Tanks & Connector Pipes Leakage Testing
If you do have a slight leak it can be hard to find.  Or at least it was for me.  I would go out for a drive and get horrible gas fumes in the car.  When I got home I would pull the panels out of the trunk looking for a leak and could never see anything damp.  I finally read somewhere that you can wrap the joints with tissue paper and that will show you where the leak is.  It worked for me.  It turned out the hose between the passenger side tank and the filler cap had tiny little cracks that would leak gas while cornering if the tank was near full.  I replaced that hose and everything has been good.

Have Fun,
Joe Brown

On Sun, Aug 24, 2025 at 11:21 AM Gary Winblad <winbladgary at gmail.com<mailto:winbladgary at gmail.com>> wrote:
It was 1992 when I did my tanks but you are probably worrying too much.  Make sure the metal fittings are clean and smooth, put on the rubber
connectors (make sure they are on far enough), tighten the clamps.  No leaks when I did mine.  Now my fuel pump connections were a pain...
I finally got those fixed with some liquid teflon stuff.
Gary W.


On Sun, Aug 24, 2025 at 7:40 AM Rob Hogan <robertdhogan at gmail.com<mailto:robertdhogan at gmail.com>> wrote:
Yes, remeber the video of the guy that had a gasoline leak in his garage with his E-type?

On Sun, Aug 24, 2025 at 10:38 AM Rob Hogan <robertdhogan at gmail.com<mailto:robertdhogan at gmail.com>> wrote:
While testing with pressurized air would be ideal, assuming a seal at the filler opening can be obtained, the essence of my question was what the compatilbiity and carburation effect of residual kerosene is when mixed in minute amounts with the regular gasoline.  I suspect that would be insignificant. Testing the fuel storage initially with gasoline is the least favorable option.













On Sun, Aug 24, 2025 at 10:25 AM Gary Winblad <winbladgary at gmail.com<mailto:winbladgary at gmail.com>> wrote:
And push the Tiger outside.  Gas spills inside can build to explosive mixture, not to mention fire.
Gary W.


On Sun, Aug 24, 2025 at 4:36 AM Jeffery Randall <jefferyrandall at gmail.com<mailto:jefferyrandall at gmail.com>> wrote:
Just put in the smallest amount of gas, like a half gallon, max. If there's a leak that will find it. Be sure the hoses are centered as much as possible and tighten the clamps as snugly as. you can.

On Sat, Aug 23, 2025 at 7:13 PM Rob Hogan <robertdhogan at gmail.com<mailto:robertdhogan at gmail.com>> wrote:

After completing the reinstallation of my tiger's 2 gas tanks, I'm trying to determine the best means of testing for any rubber connector leaks.
Has anyone tested for leakage by adding a few gallons of kerosene?
Any usable test fluid would have to be flushed out before doing a purge with gasoline.
I don't want to risk adding gasoline until I know if there are no leaks because of the flammability risk.
Haven't found any information on the net.
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