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1973 Gas tank venting
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Whaanga
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Joined: May 07, 2016
Posts: 344
Location: Rochester, NY
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PostPosted: Sun Jul 10, 2016 2:03 pm    Post subject: 1973 Gas tank venting Reply with quote

In another post I've been receiving help pertaining to why my bus engine is loosing power. In doing lots of studying and reading I've seen photos in the Bently showing a set of tubing that runs up the sides of both sides of the back of the bus. When I look in my engine bay, I see what looks like an incomplete set of these tubes as seen below. What does this system do and is it possible,to repair mine?


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old DKP driver
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Joined: March 30, 2005
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Location: Los Gatos,Ca.
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PostPosted: Sun Jul 10, 2016 2:53 pm    Post subject: Re: Gas tank venting Reply with quote

Th fuel tank venting & evap hoses are important and will need to addressed
as some people have been known to cap them off without realizing the
gas tank needs to breath and dump the fumes into the charcoal canister.

In the Green Bentley repair manual Chapter 3 (fuel System) you will find
more info and a good picture of items you can't see that have short pieces
of hose connecting the metal lines. up in the sides above the taillights are the
most difficult to replace. Page 5, fig 3-1 will show you a better picture.
_________________
V.W.owner since 1967
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Tcash
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Location: San Jose, California, USA
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PostPosted: Sun Jul 10, 2016 5:31 pm    Post subject: Re: 1973 Gas tank venting Reply with quote

That is part of the EVAP system. Gas tank vent system. No vent no gas. So if someone plugged that off as suggested, your not getting gas out of the tank.

Evaporative Emission Control EVAP/Charcoal, Carbon Canister

Might want to mention this in your other 3 page thread.
http://www.thesamba.com/vw/forum/viewtopic.php?t=658592&postdays=0&postorder=asc&start=0

Good luck
Tcash
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Whaanga
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Location: Rochester, NY
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PostPosted: Sun Jul 10, 2016 8:05 pm    Post subject: Re: 1973 Gas tank venting Reply with quote

Thanks Tcash. There is so much to learn and guys like you are so helpful and patient with guys like me. Will post these photos and bring this up on my other 3 pager.
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