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Beetspeed
Samba Member
Joined: July 30, 2004
Posts: 429
Location: The Netherlands
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 Posted: Wed Apr 14, 2021 3:07 pm Post subject: 1500S fuel line valve |
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According to the parts book, there is actually a ‘fuel line valve’ in the system.
This is a very original car and the part looks original and as old as the rest.
It has 5 fuel line connections no less.
But what does this ‘valve’ do? Fuel pressure regulator?
https://flic.kr/p/2kSXuPL
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'75 SB 1303 2,4ltr T4 turbo: 10.58 @ 129.9mph
'65 Ruska buggy 1192cc EFI 80hp N/A |
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ataraxia
Samba Member
Joined: March 19, 2010
Posts: 4504
Location: Illinois
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| Posted: Wed Apr 14, 2021 3:16 pm Post subject: Re: 1500S fuel line valve |
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| It's both a "T" and a check valve. |
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Beetspeed
Samba Member
Joined: July 30, 2004
Posts: 429
Location: The Netherlands
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| Posted: Wed Apr 14, 2021 11:34 pm Post subject: Re: 1500S fuel line valve |
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Oké, but does it check pressure, flow direction or what?
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'75 SB 1303 2,4ltr T4 turbo: 10.58 @ 129.9mph
'65 Ruska buggy 1192cc EFI 80hp N/A |
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Bobnotch
Samba Member
Joined: July 06, 2003
Posts: 22410
Location: Kimball, Mi
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| Posted: Thu Apr 15, 2021 6:27 am Post subject: Re: 1500S fuel line valve |
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| Beetspeed wrote: |
| Oké, but does it check pressure, flow direction or what? |
Flow direction. Basically it's an antisiphon valve. Early dual carbed type 3s had a problem when parked "nose up", and fuel would continue to flow into the carbs, over powering the floats, and causing hydro-lock.
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Bob 65 Notch S with Sunroof
71 Notch ...aka Krunchy; build pics here;
http://www.thesamba.com/vw/forum/viewtopic.php?t=249390 -been busy working
64 T-34 Ghia...aka Wolfie, under construction... http://www.thesamba.com/vw/forum/viewtopic.php?t=412120
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| "Friends are God's way of apologizing for relatives." |
| Tram wrote: |
| People keep confusing "restored" and "restroyed". |
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notchboy
Samba Member
Joined: April 27, 2002
Posts: 22448
Location: Escondido CA
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| Posted: Thu Apr 15, 2021 6:53 am Post subject: Re: 1500S fuel line valve |
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| Bobnotch wrote: |
| Beetspeed wrote: |
| Oké, but does it check pressure, flow direction or what? |
Flow direction. Basically it's an antisiphon valve. Early dual carbed type 3s had a problem when parked "nose up", and fuel would continue to flow into the carbs, over powering the floats, and causing hydro-lock. |
Yes, fill your engine with gas. 
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| t3kg wrote: |
OK, this thread is over. You win. |
Jason "notchboy" Weigel
1964 1500 S
1964 T34 S Convertible
1977 Westfalia Camper pop-top |
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Beetspeed
Samba Member
Joined: July 30, 2004
Posts: 429
Location: The Netherlands
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| Posted: Thu Apr 15, 2021 7:39 am Post subject: Re: 1500S fuel line valve |
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Ah! tnx guys! Learned something again.
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'75 SB 1303 2,4ltr T4 turbo: 10.58 @ 129.9mph
'65 Ruska buggy 1192cc EFI 80hp N/A |
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Zwitterkafer
Samba Member
Joined: November 17, 2007
Posts: 878
Location: Lanark County, Ontario, Canada
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| Posted: Thu Apr 15, 2021 12:22 pm Post subject: Re: 1500S fuel line valve |
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According to the VW 1500 Service Manual, the anti-siphon valves were added in production, in Sept 1964. The single carb engines got 315 127 405 with 4 hose connections, and the dual carb engines got 311 127 405 with 5 hose connections. The valves were approved for service installation into earlier cars, provided that the factory recommended hose routing was followed.
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"Criticism comes easier than Craftsmanship"
- Zeuxius, 400 BC |
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