6 replies to this topic

[UCSLE]

Having Cars sit around for months / weeks is not good for the fuel so i thinking of a idea that may help

 

Vented fuel tanks are supposed to worst than sealed tanks for fuel life so the idea is to put a tap on the vent that can be open when used and closed when the car is stored.

 

This would cause a problem on hot days with to much pressure in the tank , to over come this problem a Pressure relief valve would also be added 

 

Finding a small enough Pressure relief valve with the right pressure and having a tap that is easy to get to may be a problem 

 

Other things like non vented cap and fuel tap could also be added 

 

Would make it a little bit harder to steal as well if done right 

 

Is this a Good idea or bad and anyone seen / done something similar ? 

 

 tank vent1.jpg   41.6K   2 downloads

Edited by UCSLE, 19 September 2025 - 03:14 PM.

[yel327]

I'd just invest in fuel stabiliser.

[Shiney005]

My L34 has an electronic solenoid in the fuel line. Sort of like a line locker I suppose. But being an early LH it has the two hockey stick vent tubes in the rear wheel wells so a simple cap over the ends of these would be all I need if kept indoors.

I don't know that sealing the fuel would make much of a difference anyway. It still goes off in jerry cans.

[UCSLE]

Was for the LJ so will be kind of like the early LH

 

Fuel stabiliser is a good idea but something that would need replacing every time the fuel got used 

 

Not expecting it to make the fuel last heaps longer but it should be simple to do

[76lxhatch]

Rust would be another consideration, sealing up the tank means any moisture in there can't escape.

 

Don't the non-vented caps have a pressure relief?

[Shiney005]

Nup.

[UCSLE]

Rust would be another consideration, sealing up the tank means any moisture in there can't escape.

 

Don't the non-vented caps have a pressure relief?

That made me start thinking of how really bad my idea was , sealing up the tank also means nothing can get in 

 

When we used to ride dirt bikes on hot day the Jerry cans would swell , then when they got used the pressure would be released . Put them shed at night , the next morning they had collapsed