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Thread: Fuel Filler Roll-over Flap.

  1. #1 Fuel Filler Roll-over Flap. 
    club member Club Member
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    Hi All

    I am still in the process of rebuilding my Roadster and due to my fuel filler assembly being an antique. vented and non lockable and for safety I want to install a roll-over flap in the filler neck as per all modern cars. Despite searching the net I cant find anything that resembles a roll-over flap so my question is has anybody else fitted one, how and where did you acquired it or where from? I have thought of going to the scrappers and taking an assembly out of a scrap car but if a universal assembly is readily available off the self them I would sooner go down that route.

    I don't know why but I have horrible visions of ending up upside down in my Roadster with the fuel in the tank gradually running out around my head just waiting for a spark. Improbable I know but not impossible. I realise that I could just fit a modern fuel filler with a lockable cap which is a route that I may have to eventually venture down but not until I exhausted all avenues to install a roll-over flap have prove not viable. Incidentally is it a requirement of the IVA for kit cars that have a roll-over flap to pass the IVA?

    Kind Regards

    Mick.
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  2. #2 Re: Fuel Filler Roll-over Flap. 
    club member Club Member andyf's Avatar
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    Sep 2014
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    Yateley, Hampshire
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    806
    I used an anti surge device from an mx5. Fits the neck of the escort tank quite nicely.
    Mk2 SWB Marina Roadster with a 2.0L Pinto built in 1986
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  3. #3 Re: Fuel Filler Roll-over Flap. 
    club member Club Member
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    Check Car Builders Solutions.
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  4. #4 Re: Fuel Filler Roll-over Flap. 
    club member Club Member
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    Nov 2011
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    481
    I’m not sure about a roll over flap on the filler. As far as I know modern cars have leak proof caps (sealed when shut). Expansion and contraction within the tank as well as allowing air to replace spent fuel is taken care of by a separate venting system.

    There must be huge volumes written on venting systems. My car was originally fitted with a simple vent pipe leading to a roll over valve. From there it simply vented to the atmosphere. As used on a 1985 Sierra.

    This does allow fumes to escape which is frowned upon these days. Personally, I am not averse to sniffing petrol. But my wife is certainly against it and with an integral garage it was a source of contention.

    So now I have a Zetec engine and the tank is vented through a carbon canister via a roll over valve. The carbon captures any fumes. The engine management system is configured to suck the fumes out of the canister when running at over 1,800 rpm. As used in a 2005 Ford Focus. Marital harmony has ensued.

    One tip is to vent the tank on one side of the car and run the vent pipe to the other side of the car. This avoids fuel spilling out of the car when cornering. This is a hard won lesson.
    Paul
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