'72 fuel tank Vapor Check valve

[Tom L.]

Went for a run last night and filled up. After stopping we smelled gas. Turns out that the check valve on the drivers side of the tank that leads to the charcoal canister is leaking. I took it out and got a couple of pieces of hose, put it in water and blew. I quikly found the leak. It was on the seem on the bottom. Has anyone had any had any luck re-sealing these valves???

I do not relish the idea of fuel dripping on the muffler, fire is bad! Thanks!!

[Christopher K.]

Re: '72 fuel tank Vapor Check valve

Lynn

Same thing happened to me on my '73. I haven't seen anyone fix these. I have seen some Nos ones for sale and most vendors have a repro for around $45. And yes, it is a dangerous area to leak!

Good luck,

[Gerard Q.]

Re: '72 fuel tank Vapor Check valve

GT-380.JPGZip has them

http://www.zip-corvette.com/ProductD...=SGR-SR&CTitle=&

[Don L.]

Re: '72 fuel tank Vapor Check valve

FWIW, I used some epoxy to seal a crack on one of these one time. I did this approx 2 days before I ordered a new one.

It still leaked and like you, Lynn, I didn't like thinking about the consequences. I did replace it without having to drop the tank. Not easy, but after the bleeding stopped and cuts healed, I was happy with the outcome.

[Tom L.]

Re: '72 fuel tank Vapor Check valve

Several years ago I removed it because the hoses rotted but the valve was OK so I have experience changing it without dropping the tank. I have the painful memories made by all those sharp edges.

I was hoping there would be some kind of epoxy that might resist gasoline, I know most don't. I really want to use the car this weekend, there's a show I'd like to attend. Guess I'm waiting for UPS to get here. Thanks anyway!!

[Mike F.]

Re: '72 fuel tank Vapor Check valve

Several years ago I removed it because the hoses rotted but the valve was OK so I have experience changing it without dropping the tank. I have the painful memories made by all those sharp edges.

I was hoping there would be some kind of epoxy that might resist gasoline, I know most don't. I really want to use the car this weekend, there's a show I'd like to attend. Guess I'm waiting for UPS to get here. Thanks anyway!!

JB Weld might work. I fixed a hole in a rental cars transmission that way, but thats a whole other story.

[Don L.]

Re: '72 fuel tank Vapor Check valve

JB Weld might work. I fixed a hole in a rental cars transmission that way, but thats a whole other story.

Dude, ya can't just stop there! C'mon...

[Joe L.]

Re: '72 fuel tank Vapor Check valve

Went for a run last night and filled up. After stopping we smelled gas. Turns out that the check valve on the drivers side of the tank that leads to the charcoal canister is leaking. I took it out and got a couple of pieces of hose, put it in water and blew. I quikly found the leak. It was on the seem on the bottom. Has anyone had any had any luck re-sealing these valves???

I do not relish the idea of fuel dripping on the muffler, fire is bad! Thanks!!

Lynn-----


The type of plastic used for the separator is extremely difficult to repair. I believe it's linear polypropylene or some similar plastic. No epoxy is going to bond to it. Most epoxies are extremely resistant to gasoline but that's not the problem here; the problem is getting the adhesive to bond to the plastic. I've been told that Permatex/Locktite now has an adhesive that will bond to this type of plastic. However, whether that adhesive is resistant to gasoline I do not know.

The best plan: obtain a NEW separator.

[Paul B.]

Re: '72 fuel tank Vapor Check valve

JB Weld might work. I fixed a hole in a rental cars transmission that way, but thats a whole other story.

...I repaired the one on my '74 L-48 coupe 7yrs ago with JB Weld and it's been perfect since.

[Tom L.]

Re: '72 fuel tank Vapor Check valve

Did you do anything specific to prep the surface before applying the epoxy??

[Mike F.]

Re: '72 fuel tank Vapor Check valve

Dude, ya can't just stop there! C'mon...