Mystery clamp and hose

[Colo Dean]

Slowly working on the tear down. (74 CJ5 ) Working at the drivers front fender, and when I removed the washer fluid container I noticed this round bracket below along with a plastic hose.


Anyone know what it supposed to be mounted in the round bracket?

Also wondering about the plastic tube. I followed the tube along the frame rail to the rear corner where it goes up behind the drivers brake light to some other plastic part (not trying to sound stupid here just dont know what it is) I believe it to be some sort of emissions parts??? It also has 2 red plastic tubes that come off of it and looks like they should go to the fuel tank. I see 2 ports on the fuel tank that have been plugged. Is this some sort of return or vent for the fuel?

Ending point behind brake light


2 red tubes near fuel tank


Should the red tubes be hooked back up to the fuel tank or are they not needed?

Thanks in advance

 

[HackFabrication]

Charcoal canister for EVAP system. You'll need it if you have to pass a visual smog inspection.

The other two items in the rear are the factory check valve and rollover valve.

Pic is of a later model:

 

[Colo Dean]

Thanks, may work on replacing the charcoal canister down the road. Since its registered as a classic, there are no visual or smog tests that I have to do. Will look into hooking up the red hoses back to the fuel tank once I figure out what the PO did to plug the tank.

On a side note, I noticed on the passenger frame rail, the fuel line is mostly plastic until it gets to the fuel pump. Was this common to use plastic fuel line then or something else the PO did?

 

[mtnwhlr]

On a side note, I noticed on the passenger frame rail, the fuel line is mostly plastic until it gets to the fuel pump. Was this common to use plastic fuel line then or something else the PO did?

I have never worked on one as old as yours but on the newer ones they had a hard line running from the tank to the pump and I would bet that is how yours should be.

 

[Colo Dean]

Kinda thought so, looks like anther reason to hit the parts store. Not sure I like the idea of plastic line and fuel together.

 

[73CJ]

Those red tubes look. Pretty familiar. I m pretty sure that was stock.

Those charcoal cans are pretty expensive now and were a poor attempt to help emissions.

The check and rollover are worth hooking up.

 

[Colo Dean]

Thanks, may just watch for a canister at a salvage yard and hook up the rest for now.

 

[HackFabrication]

On a side note, I noticed on the passenger frame rail, the fuel line is mostly plastic until it gets to the fuel pump. Was this common to use plastic fuel line then or something else the PO did?

OEM would have been steel and rubber.

 

[HackFabrication]

The check and rollover are worth hooking up.

Simply: The rollover and check valves prevent liquid gasoline from being sucked into the charcoal canister. In the event of a rollover or 'flop' onto the driver's side, without the check valve, the engine may run long enough to provide vacuum and instead of drawing fumes it would draw liquid.

Preventing liquid gasoline from running out of the tank would rely on the gas cap seal and the seal where the sending/pickup unit inserts into the tank. Without a good seal on these parts (and filler/vent hoses), gasoline will still spill and present a fire hazard.

 

[Peanut Butter]

My CJ had Green Plastic lines on parts of the return line and to the roll over valves. Must be a trend! Rod

 

[Colo Dean]

Simply: The rollover and check valves prevent liquid gasoline from being sucked into the charcoal canister. In the event of a rollover or 'flop' onto the driver's side, without the check valve, the engine may run long enough to provide vacuum and instead of drawing fumes it would draw liquid.

Preventing liquid gasoline from running out of the tank would rely on the gas cap seal and the seal where the sending/pickup unit inserts into the tank. Without a good seal on these parts (and filler/vent hoses), gasoline will still spill and present a fire hazard.

If I reconnect the check/rollover valves should I plug the line going to the canister until I locate one? Or is this not an issue since without the canister there wont be a vacuum being drawn on that part of the system.