Rollover valve
Lead Driver
Joined: Nov 2006
Posts: 5,217
Likes: 506
From: Pa.
And thank you for doing so. I have the same question as the OP. I just bought a new tank for my 1974 f100 302. I got W/ Rollover Valve option, this tank has a hole in the top.
I haven’t dropped the old tank yet - probably be doing this swap in the next couple weeks. Is there a valve or something that plugs into the hole? Or does it literally just stay open? I’d probably plug it if so cause there are some small holes here and there in my bed. Don’t want water, dirt, etc getting in.
thanks!
I haven’t dropped the old tank yet - probably be doing this swap in the next couple weeks. Is there a valve or something that plugs into the hole? Or does it literally just stay open? I’d probably plug it if so cause there are some small holes here and there in my bed. Don’t want water, dirt, etc getting in.
thanks!
Moderator & parts slinger
Joined: Feb 2007
Posts: 50,251
Likes: 5,815
From: S/W Missouri, Polk county
Or read what I put in post #10, here so you do not have to scroll.
"There are two differences between the tanks. Tanks with EEC have a hole in the top center of the tank. A rubber grommet and check valve are pressed into the hole. A line goes from the check valve along the inside of the passenger side frame rail to the engine compartment where it hooks up to a charcoal canister."
If you do not have a EEC system, then you do not need a EEC tank. But it you got the wrong tank for you application it is easier to get the rubber grommet and check valve use what is suppose to go in there versus leaving it open. Leaving it open is a bad idea.
"There are two differences between the tanks. Tanks with EEC have a hole in the top center of the tank. A rubber grommet and check valve are pressed into the hole. A line goes from the check valve along the inside of the passenger side frame rail to the engine compartment where it hooks up to a charcoal canister."
If you do not have a EEC system, then you do not need a EEC tank. But it you got the wrong tank for you application it is easier to get the rubber grommet and check valve use what is suppose to go in there versus leaving it open. Leaving it open is a bad idea.
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