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Fuel leaking out from under filler cap 444-544

posted by  someone claiming to be PVGuy on  Thu Jun 5 13:31 CST 2025 [RELATED]

Gas leaks out from under my fuel neck filler cap during hot weather with the car sitting rearward at an angle. Recently at a car show it was 85 degrees, the car was sitting on a street slope with the back end down more than the front. Tank was probably fairly full. After several hours with the high temps, fuel began leaking out from under the fill cap. It has the original filler cap type, with rubber gasket.
Obviously unlike modern cars with special venting design, when fuel expands under heat it's got to go somewhere. But did Volvo design anything in these PV's to accommodate that issue?
I had to remove the car from the car show. Quite embarasing!






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