Petrol cap back pressure.
Posted
#630450
(In Topic #75901)
Settling In
Petrol cap back pressure.
When taking off the petrol cap to fill up with petrol, i get alot of pressure gush out. Is this dangerous, can it be fixed?
Cheers
Dave
Cheers
Dave
Posted
Local Hero
This debate did the rounds a while ago. Mine does the same, others claimed that?s its wrong and should have a vacuum?
1983 Mars Red 1.8 Golf GTI
1987 Alpine White 1.8 Clipper Cabriolet
The trouble with doing nothing is that you never know when you are finished.
1987 Alpine White 1.8 Clipper Cabriolet
The trouble with doing nothing is that you never know when you are finished.
Posted
Old Timer
check your breather under the car isn't keeked up with crud.
tank obviously isn't breathing
tank obviously isn't breathing
Posted
Settled In
mine does the same aswell, my mate told me its not a bad thing??
Mk1 1983 Helios Blue GTI Engineering
Posted
Local Hero
Make sure what you think is pressure is not a vacuum.
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Posted
Local Hero
Tank by design should retain some residual pressure …… It helps the the pump and general running see
From The injection bible
Cheers……….This is of course for injected cars only
The fuel tank is the obvious place to start in any fuel system explanation - unlike the tanks on early carburetor fuelled engines it is a sealed unit. This allows the natural gassing of the fuel to aid delivery to the pump by slightly pressurising the tank It may be noted that when the filler cap is removed, pressure is heard to escape. Filler caps are no longer vented as previously found.
From The injection bible
Cheers……….This is of course for injected cars only
Posted
Settling In
Cheers, thats good to know its not a bad thing then.
Dave
Dave
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