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Keith True · 03-15-2024, 10:17 AM

The cap has to be vented,it can't airtight.The car won't run long with a sealed filler.When the gas gets hot it has to vent somewhere,unless it is leaking gas I wouldn't fool with it.If I have the windshield open I always get whiffs of gas,more so on hot days.The A is not a modern car with a sealed up fuel system.

03-15-2024, 10:17 AM	#5
Keith True Senior Member Join Date: May 2010 Location: Epping N.H. Posts: 3,421	Re: Gas tank filler neck The cap has to be vented,it can't airtight.The car won't run long with a sealed filler.When the gas gets hot it has to vent somewhere,unless it is leaking gas I wouldn't fool with it.If I have the windshield open I always get whiffs of gas,more so on hot days.The A is not a modern car with a sealed up fuel system.