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Old 07-20-2018, 03:20 PM
RAII4speed RAII4speed is offline
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Default Pressure in gas tank 1969 Nova SS 350
My 1969 Nova SS 350 4-speed Has pressure in the tank every time I run it and it has a vented cap. Is that normal?
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  #2  
Old 07-20-2018, 04:59 PM
L78steve L78steve is offline
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Normal. Cap lets air in not out.
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Old 07-20-2018, 05:24 PM
RAII4speed RAII4speed is offline
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It actually broke the seam in the top of the original tank and I do not want to harm the new one. What to do?
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Old 07-20-2018, 08:36 PM
L78steve L78steve is offline
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Iv,e never heard of the pressure build up causing a problem. Besides the needle and seat in the carb. would pop off if the pressure was excessive.
Gut an old cap and install a pressure gauge. Bet its less than a pound.
It may seem like more due to the volume.
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Old 07-20-2018, 08:38 PM
L78steve L78steve is offline
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Most times I fill up my 70 Nova I get a pressure release.
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67 L/78 Camaro SS/RS H-H,1W,2LGSR,3SL,4K,5BY. (Sold)
70 L/78 Nova M-21,Black Cherry,Sandalwood Int.
09 Pontiac G8 GT Premium,Sport,Roof. Liquid Red.
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Old 07-21-2018, 12:05 AM
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Old 07-23-2018, 05:05 PM
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My old 70 Nova used to hiss at you all the time when unscrewing the cap. I never did figure out why, but I guess it's normal?
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