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04-13-2005, 07:29 PM
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#1 |
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Registered User
Join Date: Aug 2004
Location: Overland Park, KS
Posts: 79
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Gas cap, vented
I replaced the fuel pump on a 72 GMC with a single in / single out pump so all of the other lines leading to the original cab fuel tank are capped. I need a new gas tank cap. The old one lets fuel slosh out on corners. Are all the gas tank caps vented or just the 67 thru 71 type?
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04-13-2005, 09:32 PM
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#2 |
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Cantankerous Geezer
Join Date: Aug 2002
Location: Bel Aire, KS
Posts: 6,264
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I was thinking they changed the cap after 70 to a non-vented cap. The new replacement caps don't let fuel slosh out, at least not the ones I recently bought. I'm assuming you have an older cap, since it leaks. I bought a new cap for my 52 three weeks ago, it's the same cap as my 69. Both allow some pressure to build in the tank.
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Fred There is no such thing as too much cam...just not enough engine. 
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04-14-2005, 02:23 PM
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#3 |
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Registered User
Join Date: Jan 2004
Location: Garland TX Dallas area
Posts: 658
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71 and 72 caps are smaller then 67-70 I am not sure about the 72 but on my 69 Thanks to ddsmith I sovled my vent problem follow his instuctions in this post and it stops the pressure build up problem.
http://67-72chevytrucks.com/vboard/s...ghlight=vented ddsmith if you read this you should post the process in the FAQs section
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1998 Pontiac Grad Prix GTP 1969 C10 396 TH400 3.08 posi |
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