gas cap for 72 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

50mercfan · 11-16-2011, 04:47 PM

Quote:

Originally Posted by BB72CHEVKT

you do not need vented for a 72

i thought 72's were vented? arent they different than the others?

dmack91 · 11-16-2011, 06:57 PM

I believe the 72, since it had the beginnings of emission equipment on it, was a sealed system to recover the vapors. Therefore, it would be a non-vented cap. I am sure more knowledgeable will chime in though.

BB72CHEVKT · 11-16-2011, 08:57 PM

Quote:

Originally Posted by dmack91

I believe the 72, since it had the beginnings of emission equipment on it, was a sealed system to recover the vapors. Therefore, it would be a non-vented cap. I am sure more knowledgeable will chime in though.

correct, it is vented thru a charcoal canister under the hood with lines running from the tank

**LockDoc** · 11-16-2011, 09:23 PM

Quote:

Originally Posted by 50mercfan

i thought 72's were vented? arent they different than the others?

You have it backwards. The '67 - '70 or '71 were vented and the '72's were non-vented.

LockDoc

11-16-2011, 06:57 PM	#2
dmack91 Registered User Join Date: Jan 2011 Location: Redmond, OR Posts: 763	Re: gas cap for 72 I believe the 72, since it had the beginnings of emission equipment on it, was a sealed system to recover the vapors. Therefore, it would be a non-vented cap. I am sure more knowledgeable will chime in though. __________________ 68 Chev C20- son has it now 83 K20 - bought from son 70 C20 - in progress



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