Gas leak

[70cst]

Got uo this morning and smelled gas … looks like I have a leak on the Circuit Rider …

[Palf70Step]

Just in the cab or is the smell from outside also?

[70cst]

Originally Posted by Palf70Step

Just in the cab or is the smell from outside also?

Outside ... I think I saw a small pool of gas on the cement under the engine.

[jeffahart]

Maybe not, if you don't actually see gas leaking. My garage stank like gas for months, I got sick of it. Installed a WIX - 33054 and recirculated back through the top of the fuel sending unit. I wasn't happy about having to do it but the gas smell in my shop is gone. Worked like a charm. If you can't find a leak you may be heat soaking and boiling off.

good luck!

j

[MikeB]

Originally Posted by jeffahart

Installed a WIX - 33054 and recirculated back through the top of the fuel sending unit. I wasn't happy about having to do it but the gas smell in my shop is gone. Worked like a charm.

How is it connected and where did you install it?

I should have asked what's the theory behind using it.

[jeffahart]

Originally Posted by MikeB

How is it connected and where did you install it?

I should have asked what's the theory behind using it.

I installed the WIX right above the rocker cover as close as I could to the carb. I ran a 1/4" steel line following the path of the supply fuel line up through the bottom of the cab and used a through bulkhead hose barb fitting with a 1/4" (inner diamater) to penetrate the fuel sending unit. Pretty easy. But like I said I wasn't happy about having to do it as I had to cut into my fuel line and use a small section of rubber hose to make the connections at the WIX and at the hose barb going through the top of the sending unit.

The theory: (and short answer) It's not really a theory, but a fact that today's fuel has a lower boiling point. When you shut down your engine the temps under the hood get even hotter, no water or air circulating. The fuel in the pump and carb starts to boil and creates pressure and floods the carb. If you have trouble starting your truck 10-15 minutes after sitting and it starts like it's flooded, it's because it is. And that's the gas smell. I drive my truck in 110+ heat here. The solution works for me. But after hard runs in extreme heat I still sometimes get the hard start, but it's very minor now, just a slight tap on the gas pedal and it fires up. It used to be real bad and my garage reeked like a gas spill. But I never get the gas stink in my shop anymore.

Easy solution and it worked for me... just annoyed about having to hack into my solid fuel line.

j

[MikeB]

I understand the boiling problem, but not how this solution addresses it. How does sending a small amount of fuel back to the tank prevent fuel in the float bowls from boiling?

[jeffahart]

Originally Posted by MikeB

I understand the boiling problem, but not how this solution addresses it. How does sending a small amount of fuel back to the tank prevent fuel in the float bowls from boiling?

I think the point you want clarified it the gas already in the carb right? In normal driving, once the carb is satisfied the excess fuel will go out the return line. Once you shut down and fuel begins to vaporize the vapor will collect in the filter and force fuel out the return line. But what about whats in the carb already. No more fuel will forced into the carb once you shutdown, but you could get some vapor coming off fuel already the carb... but it's negligible and at least you won't get a bunch of excess fuel forced in.

j