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gmbus
Samba Member
Joined: November 26, 2004
Posts: 191
Location: Vermont
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 Posted: Tue Apr 18, 2006 6:33 am Post subject: crankcase pressure question |
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My 1600 dp has a hose running from the top of the oil filler to the air cleaner, I read this is not really the best thing to do because of increased detonation. Should I just buy a small filter to replace the hose connection?
Also the lower draft tube is missing the rubber boot, can you just buy a rubber cap and put a slit in it? another samba solution I read was using foam on the end of the tube.
Thanks for advice!
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1961 Single Cab
1966 Beetle |
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Eric&Barb
Samba Member
Joined: September 19, 2004
Posts: 24823
Location: Olympia Wash Rinse & Repeat
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| Posted: Tue Apr 18, 2006 7:26 am Post subject: |
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Hi gmbus,
Leave the hose, it will not cause detonation. Even if removing it did, it is not the REAL cause of the problem. Besides it reduces both crankcase pressure and the release of pollutants by sucking them out of there.
You could buy;
http://www.wolfsburgwest.com/cart/DetailsList.cfm?ID=311115541
Vintagebus.com has the bus parts manuals and you can search WW (and other part suppliers) with either the proper wording or part number from the parts manual. Just make sure to enter into WW search all part numbers without the spaces. |
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gmbus
Samba Member
Joined: November 26, 2004
Posts: 191
Location: Vermont
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| Posted: Tue Apr 18, 2006 7:45 am Post subject: |
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thanks. I really don't have any evidence of detonation, I just read that having the hose connected could increase the chances of it.
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1961 Single Cab
1966 Beetle |
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ToolBox
Samba Member
Joined: January 27, 2004
Posts: 3439
Location: Detroit, where they don't jack parts off my ride in the parking lot of the 7-11
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| Posted: Tue Apr 18, 2006 7:55 am Post subject: |
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| Leave the hose. If removed there will be no vacume pulling crankcase gases out of the block. The ACVW has a primative at best PCV system but it still provides a vital function. |
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pyrOman
Fire Master
Joined: July 21, 2003
Posts: 12413
Location: Over 2002 posts deleted!
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| Posted: Tue Apr 18, 2006 8:02 am Post subject: Re: crankcase pressure question |
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| gmbus wrote: |
| My 1600 dp has a hose running from the top of the oil filler to the air cleaner, I read this is not really the best thing to do ... |
Funny thing how some people claim that the factory designed application for certain items is "not the thing to do". Specially on the issue of crankcase ventillation! 
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Some people are so busy being clever they don't have time enough to be wise. |
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gmbus
Samba Member
Joined: November 26, 2004
Posts: 191
Location: Vermont
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| Posted: Tue Apr 18, 2006 1:59 pm Post subject: |
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yeah, thats why I figured I put that idea to the samba 'test' 
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1966 Beetle |
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BarryL 
Samba Member
Joined: November 01, 2004
Posts: 14303
Location: Casa de Oro, California
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| Posted: Tue Apr 18, 2006 2:56 pm Post subject: |
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| The road draft tube is actually the only water part of the aircooled VW. It allows moisture droplets from condensation to drip away, hence the slit. Without the rubber all it does is suck in dirt and allow crankcase pressure to occur. VW still sells NOS tips of the most supple quality. I wouldn't use anything else. On early busses, I don't know about them, but if the draft tube has the little hole on the side of the tube at the botom then it needs a rubber tip in conjunction with the PCV sucker. |
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spqreddie
Samba Member
Joined: July 05, 2007
Posts: 34
Location: Roma, Italia
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| Posted: Mon Jan 17, 2022 1:27 am Post subject: Re: crankcase pressure question /// Rubber valve, oil breather |
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Hello All,
Anybody know if the rubber boot (311115541) should cover the hole in the rigid pipe or not?
Thanks!
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Lind
Samba Member
Joined: November 06, 2000
Posts: 9936
Location: idaho
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| Posted: Mon Jan 17, 2022 9:54 am Post subject: |
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| BarryL wrote: |
| The road draft tube is actually the only water part of the aircooled VW. |
Where does the antifreeze go in a 1968 VW?
In the windshield washer fluid.
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Eric&Barb
Samba Member
Joined: September 19, 2004
Posts: 24823
Location: Olympia Wash Rinse & Repeat
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| Posted: Mon Jan 17, 2022 10:03 am Post subject: Re: crankcase pressure question /// Rubber valve, oil breather |
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| spqreddie wrote: |
Hello All,
Anybody know if the rubber boot (311115541) should cover the hole in the rigid pipe or not?
Thanks! |
The hole in the downdraft pipe is to lock the breather vent boot to it so it does not fall off the pipe. There is a cast lug inside the boot goes into that hole in the downdraft pipe.
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Eric&Barb
Samba Member
Joined: September 19, 2004
Posts: 24823
Location: Olympia Wash Rinse & Repeat
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| Posted: Mon Jan 17, 2022 10:23 am Post subject: Re: crankcase pressure question /// Rubber valve, oil breather |
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You also will need to cut a slit in the lowest part of that boot to allow water to drain out.
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spqreddie
Samba Member
Joined: July 05, 2007
Posts: 34
Location: Roma, Italia
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| Posted: Mon Jan 17, 2022 10:44 am Post subject: Re: crankcase pressure question /// Rubber valve, oil breather |
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| Eric&Barb wrote: |
| spqreddie wrote: |
Hello All,
Anybody know if the rubber boot (311115541) should cover the hole in the rigid pipe or not?
Thanks! |
The hole in the downdraft pipe is to lock the breather vent boot to it so it does not fall off the pipe. There is a cast lug inside the boot goes into that hole in the downdraft pipe. |
thanks! unofritunately not in this repro part i have.. but now it is clear! thanks!
Yes, the bottom is cut. I replaced it as the previous one was too rigid and i was afrait it vouldnt drain automatically.
Thanks! |
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