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Strange but true
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Supporting Member of Barthmobile.com 6/12
Formally known as "Humbojb"
Picture of Jim and Tere
posted
attached is a picture of what I call the overflow hose from the gas tank of our 89 Barth. It is a 5/8" diameter hose that comes from the gas tank to the fill door. I always called it an overflow hose because if you got to much gas in the tank it would burble up through the smaller 5/8" hose. It might also be there to let air in the tank escape when you're filling up the tank. But this one has arms like an octopus. Anyone ever seen anything like this and what the heck it means?


Jim and TereJim and Tere

1985 Regal
29' Chevy 454 P32
8411 3172 29FP3B
Gear Vendor 6 Speed Tranny


 
Posts: 3832 | Location: madisonville tn usa | Member Since: 02-19-2005Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 1/21
Picture of Steve VW
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Wow. Never seen anythng like that! confusion

In the first place that garden hose has no place in any fuel system. It looks like those might be one way siphon break valves to allow air out but that layout is truly bizarre.

A vent from tank to filler neck is desirable to prevent burping fuel while filling. A single vent line is usually adequate.


9708-M0037-37MM-01
"98" Monarch 37
Spartan MM, 6 spd Allison
Cummins 8.3 300 hp
 
Posts: 4478 | Location: Kalkaska, MI | Member Since: 02-04-2011Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 6/12
Formally known as "Humbojb"
Picture of Jim and Tere
posted Hide Post
And one of them drips right on the exhaust pipe nono


Jim and TereJim and Tere

1985 Regal
29' Chevy 454 P32
8411 3172 29FP3B
Gear Vendor 6 Speed Tranny
 
Posts: 3832 | Location: madisonville tn usa | Member Since: 02-19-2005Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 6/19
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That is really strange hmm


Harold
Cat
Sam is 12 year old Miniature Schnauzer

93 30ft Breakaway
9209-3823-30BS-11B

KE5WCW
 
Posts: 343 | Location: Mooringsport,LA | Member Since: 05-30-2019Reply With QuoteReport This Post
Picture of BarthBluesmobile
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Hi,
It do not think these are "overflow" devices. I think these are inlet vents, for the emissions control system. There should be an intake manifold vacuum source near the carburetor or throttle body, connected perhaps to some solenoids or a canister, near the front of the rig. I imagine that each of the three devices is set up with a one way valve, to allow air in, but nothing out. There are 3, perhaps, in case of failure of 1 or 2. Nothing should be leaking out.

The vacuum source at the front of the rig should be the starting point of a vacuum line going to the fuel tank. The vacuum system is set up to clear out the fumes of the fuel from the tank, and send those to be burned with the intake air.

Let me know if anything in my "guess" is right!

happy motoring,
Matt


1987 Barth 27' P32 Chassis
Former State Police Command Post
Chevrolet 454
Gibson Exhaust
 
Posts: 373 | Location: Massachusetts | Member Since: 07-28-2006Reply With QuoteReport This Post
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