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Join Date: Apr 2010
Location: Portsmouth, NH
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Venting Oil Filler Tank with Webers

What is the best way to vent the oil filler tank when using Webers?
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Donald T

'68 912 Coupe (current driver)
'68 911 Targa (workin' on it)
Old 01-21-2018, 07:55 AM
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  • You may vent it to the ground through the sheet metal;
  • you can plumb it through the top of the passenger's side air filter (if you are using K&N and the Like) with a little ingenuity; or
  • you can modify stock air cleaners to fit Weber carbs and use stock fitting.

Do not stick it into the pipe stub sticking out of the chassis (carb preheat) or you will have fumes in the cabin (seen in photo right edge just above the chassis/motor mount).

Peter

Old 01-22-2018, 04:13 AM
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Thank you Peter,
Nice solution! Do you know which/where/size part (90 degree fitting source) that needs to go into the top of the Weber air filter top? Should be a simple aftermarket part but it looks like DYI is only way to do it. Hose diameter would also be helpful.
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Donald T

'68 912 Coupe (current driver)
'68 911 Targa (workin' on it)
Old 01-23-2018, 07:30 PM
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Hose is the standard Porsche vent hose (could not find it here on Pelican: Google p/n: 616.107.795.01); fitting OD should be 25mm (~1").

I believe I used electrical conduit with brazed 90*/brazed into air cleaner top (destroys chrome finish; JB Weld could be an alternative.). It was rather inelegant since I had to wrap the fitting with electrical tape to make up the difference to the vent hose (hence the milky oil on top of the cleaner in the photo). Memory is fuzzy: I converted back to stock Solexes many years back.

Peter

Last edited by Peter Graham; 01-24-2018 at 04:55 AM..
Old 01-24-2018, 04:51 AM
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Draft tube.

If you want to be elegant, source the 356 parts for factory draft tube set-up.
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Jung

'68 912 Coupe
'82 SC sunroof
Old 01-24-2018, 08:58 AM
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Thumbs up

Peter,
Thanks for the photo. I was able to fashion a similar solution using PVC from ACE hardware ($1.50) and some 1" radiator hose from Pep Boys ($10).
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Donald T

'68 912 Coupe (current driver)
'68 911 Targa (workin' on it)
Old 01-30-2018, 02:27 PM
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