11-02-2021, 12:09 PM
(11-02-2021, 11:41 AM)John Mason Wrote: I am against sealing it as this would cause a vacuum in the tank when running and eventually stop the fuel flow. When parked in hot weather it would also possibly damage the tank with the expansion of petrol gases even perhaps an explosion.
John, the fuel vent pipe can be safely sealed up. I ran Rubies and LWB Box type cars years ago and always sealed this pipe as, if you are careless and too quick on the forecourt (who isn't at 17?), overfilling the tank sets up a syphon and empties the last 1/2 gallon (2.25l for our overseas cousins and younger readers) that you put in, onto the floor causing mayhem and shouting from the cashiers.
I used to stuff a 1/4" bolt into the tube, there's plenty of breathing capability in the cap as they're not sealed in any way, unlike modern vehicles. Also unlike moderns, the tank won't pressurize in hot weather or implode in cold weather.
I had a young MoT tester trying to fail my car once because there was no rubber seal on the filler cap, therefore it must be missing and therefore "Not Compliant". What can I say???