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Discussion in 'High Tech Retrofits' started by Rickyb1968, May 20, 2018.
Those things leak like a sieve when the tank is full.
I’m not really familiar with new cars with roll over check valves. Most new cars are using single inlet pumps and all the vent lines go to the engine bay connected to purge valves to the intake etc. No vents into atmosphere with check valves with today’s emission standards. The computers do control the pumps for deactivation when the engine dies. That’s basically the “protection”.
ok then what works?
I have an anti roll over valve in the 16 gal fuel cell in my Vette and it doesn't leak when the cell is full. There is no foam or baffles in it either and I never see any fuel out of the anti roll over vent. It's been put together for 9 years. Maybe the newer ones suck?
https://www.iimuch.com/collections/fuel-differential-vents/products/fuelvent2dm This is not a rollover valve but it's a much better vent system.
The fuel in your tank expands when it heats up, with a full tank that expansion will cause the fuel to climb up the vent line from the pressure of the expansion and out of that rollover valve you have linked. This II Much vent has a chamber to collect the fuel and a tube to vent the pressure, the chamber will self drain back to the tank once the pressure has gone down. I've had that rollover valve that Tanks and other companies sell in at least a half dozen cars and it has always leaked.
Interesting product. Looks like Ring Bros use these as well.
And the road leads back to a rollover valve per the II Much instructions.
The II Much VSB does NOT provide rollover protection. Rollover protection should be installed on the hose between the fuel tank and the port on the bottom of the VSB per manufacturer’s direction
I would ask what rollover valve he suggests and for a plumbing diagram. I don't disagree it's a good idea to have one, just not the one in your link. I've used the II Much vent without one but I've never put the car on it's lid either.
Maybe easier to go back to the charcoal canister that came with the car. I got the bracket but not the canister to hook it up. Rick