venting vs non-venting gas cap

Hey, that looks great. I am going to get one of those rollover valves too. Thanks for the pics.

 

That link no longer works, is there a part number? I am only coming up with vented caps when I look for a cap.

 

I'm not worried about locking, I just can't seem to get one that won't leak! Every vented one I have tried leaks through the vent when off camber or going around corners. I even tried plugging the vent with JB weld, which worked for a while but eventually fell out. Next I tried welding it, but took the temper out of the spring and it wouldn't fit tightly. This shouldn't be this hard!

 

I've never seen an aftermarket cap that is listed for the Jeep application that is not vented. Maybe there's another application that crosses but is not listed.

I used Liquid steel to plug the vent in 1973, but that may not work today. Look at McMaster-Carr or such for epoxy putty that is chemically resistant. You may have to buy $250 in putty to plug a single cap though.

For the locking cap, I'd suggest taking it apart and putting continuous rubber sheet across the interior of the cap. I recall the vent goes through the lock cylinder, so you'll need a barrier to block the slosh and vapor. Again, McMaster-Carr sells sheets of chemically reisistant rubber that would work.

 

I got a vented one from Walcks and it does not leak off camber.

 

Why not contact a company like Motorad which manufactures thermostats and gas caps. Explain your dilemma and ask for a suggestion. Might have a remedy.

Contact MotoRad

 

I ordered this one which is non vented. It came with a paper gasket, but even after replacing it with a rubber gasket it still leaks. I wonder if htere is a better rubber gasket I could use.

 

Get one from Walcks.
Or maybe the lip of you tank is bent?

 

Part number MGC23

 

I measured the size and ordered a cap from tanksinc.com. Seems to work well as long as I don't overfill it.