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Old 07-02-2014, 06:57 AM
hickory1991 hickory1991 is offline
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Gas cap

1976 Highboy, in-cab tank. Am I correct in assuming that my gas cap, that has printed on it "vacuum -pressure" is a non-vented cap?
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Old 07-02-2014, 08:17 AM
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The only reason you would have a non-vented cap is if there was a evap system plumbed in .. There would be 2 fuel hoses going to the engine bay one to the carb and another to a charcoal canister .. My 76 highboy has no such system plumbed and is a vented gas cap ..
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Old 07-02-2014, 08:32 AM
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The only reason you would have a non-vented cap is if there was a evap system plumbed in .. There would be 2 fuel hoses going to the engine bay one to the carb and another to a charcoal canister .. My 76 highboy has no such system plumbed and is a vented gas cap ..

Same here. Mine was a vented cap as well with one fuel line out only.
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Old 07-02-2014, 08:42 AM
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I would assume that cap is unvented, yes.
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Old 07-02-2014, 08:52 AM
hickory1991 hickory1991 is offline
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Thanks guys. I am going to have to find a vented gas cap then since the charcoal canister is long gone. Any one seen a chrome vented cap for the highboy's. I think I found a painted version but would prefer chrome.
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Old 07-02-2014, 09:05 AM
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STANT Part # 10623 $3.34

Styleside; W/O Evaporative Emission System; W/Mid, Cab Tanks

https://www.rockauto.com/catalog/x,c...,parttype,5900

Click the image to open in full size.
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Old 07-02-2014, 09:27 AM
hickory1991 hickory1991 is offline
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STANT Part # 10623 $3.34

Styleside; W/O Evaporative Emission System; W/Mid, Cab Tanks

https://www.rockauto.com/catalog/x,c...,parttype,5900

Click the image to open in full size.
Thanks Redroad. Will get on order shortly.
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Old 07-02-2014, 09:27 AM
 
 
 
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