Savage Fuel Tank.

[guinnessdublin]

My fuel tank must be over 15 yrs old & was thinking what’s the best method to check air tightness of it & original o ring on filler cap, could I simply blow up fuel delivery pipe back upto fuel tank to check tightness?

 

[lokky]

You need to compare it to a reference, unless you have strange tuning issues its probably fine, blowing will only show a significant leak. Not seen a bad o ring due to age yet, the oldest i have is also about 15 years.

 

[upbasher1]

Take the tank off and leave the lines on it. Submerge the tank in a bucket of water while holding the lines above the water. Plug the fuel line and blow into the pressure line. If bubbles come up you got a leak. If not, you're good to go

 

[guinnessdublin]

Thanks for input/info guys!
That’s what’s making me think I have a air leak problem as have now done 4 tanks of fuel through my new Hong Nor Force .28 engine & in back of my mind something is not right with running of engine. Last time I ran it the clutch gave away thinking a spring had come a drift in my Fironi clutch set up, but turned out to be i had fitted f/wheel nut the wrong way round & it came undone.
Have given my original tuned pipe agood clean out with brake fluid tonight which did shift some crud & found some crud build up in the air pressure nipple on exhaust which suspect was not helping things!

 

[lokky]

New engines cam sometimes be a pain during break in.

 

[lokky]

If you have another 'good' engine then try the tank with it to compare.

 

[guinnessdublin]

Yes was using my old FTX .26 Picco engine before which was okay but not great hence why I decided to go down new engine route!
Will give it another go now I have clutch sorted & see what that brings just don’t want to annoy neighbours to much as I live in cul-de-suc & cant drive to park with current Government guidelines in force!