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Wildthings
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Joined: March 13, 2005
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 Posted: Tue Aug 12, 2025 11:02 am Post subject: Oil Filler Styles ??? |
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Just wondering what advantage there is to the two basic styles of oil fillers. Also for the ones in the top photo without a draft tube what is the proper clocking?
And ones with a draft tube:
Last edited by Wildthings on Tue Aug 12, 2025 3:31 pm; edited 1 time in total |
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SGKent 
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| Posted: Tue Aug 12, 2025 11:21 am Post subject: Re: Oil Filler Styles ??? |
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the draft tube only clocks one way due to the tube going thru the tin. The tube was mostly a way of shedding oil that built up so it dripped out downwards as it collected. There is a rubber slit valve that goes on the bottom of it.
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busdaddy
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Location: Surrey B.C. Canada, but thinking of Ukraine
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| Posted: Tue Aug 12, 2025 12:25 pm Post subject: Re: Oil Filler Styles ??? |
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The tube is for water condensation, the later style with the larger nipple assumedly sucked it out before it had a chance to condense. The surface area of the bulb in the cold airflow above the engine gets the water out of the gases.
As engines aged some oil started to make it into the mix.
Not sure about orientation with the no drain one, they seem to be oriented with the nipple ~ 4:00-5:00 on the factory built engines.
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Wildthings
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| Posted: Tue Aug 12, 2025 3:38 pm Post subject: Re: Oil Filler Styles ??? |
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| busdaddy wrote: |
The tube is for water condensation, the later style with the larger nipple assumedly sucked it out before it had a chance to condense. The surface area of the bulb in the cold airflow above the engine gets the water out of the gases.
As engines aged some oil started to make it into the mix.
Not sure about orientation with the no drain one, they seem to be oriented with the nipple ~ 4:00-5:00 on the factory built engines. |
Thanks, I was just looking at the one on my "Thing" and saw that the cutout inside IMPLIED the top edge of the breather should be level which would have put the nipple at around 2:30. Don't have a good factory photo to show how the factory installed it originally. This engine is getting old and ratty and I am looking for ways to keep the oil usage down and I was thinking of adding a catch can, but noticed the positioning of the cutout inside the filler and wondered what the intended orientation was.
You can kinda see the cutout inside the breather/filler in the photo I posted. |
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busdaddy
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| Posted: Tue Aug 12, 2025 4:24 pm Post subject: Re: Oil Filler Styles ??? |
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Not the best photo, have a look through other 73/73 manuals if you like:
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Wildthings
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| Posted: Tue Aug 12, 2025 5:48 pm Post subject: Re: Oil Filler Styles ??? |
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| busdaddy wrote: |
Not the best photo, have a look through other 73/73 manuals if you like:
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I think that photo is an oil filler that has a draft tube, with the tube being just is slightly out of the picture, the shape of the filler seeming to matches the draft tube style at least. I went through quite a few manuals and all the fillers that I saw seemed to be the draft tube style regardless of year and model.  |
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SGKent
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Location: at the beach
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| Posted: Tue Aug 12, 2025 7:56 pm Post subject: Re: Oil Filler Styles ??? |
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Did a Google of "aircooled Mexican VW engine" and got hundreds of photos of them. This is from one of their taxi's and shows the breather.
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Wildthings
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| Posted: Tue Aug 12, 2025 11:09 pm Post subject: Re: Oil Filler Styles ??? |
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| SGKent wrote: |
| Did a Google of "aircooled Mexican VW engine" and got hundreds of photos of them. This is from one of their taxi's and shows the breather. |
Interesting, I would not have guessed that is how the factory would have installed it, but it would likely do its job well in that position. |
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RWK
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| Posted: Wed Aug 13, 2025 6:58 am Post subject: Re: Oil Filler Styles ??? |
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Possibly for the warmer climate, back in the day when they were driven year round, (winter here), they tended to rust out where the water settles, sludge builds up and the water can't drain, some cars were only driven short distances and never warmed up all the way.
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NASkeet
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Location: South Benfleet, Essex, UK
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| Posted: Sun Aug 17, 2025 11:50 am Post subject: Re: Oil Filler Styles ??? |
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| busdaddy wrote: |
The tube is for water condensation, the later style with the larger nipple assumedly sucked it out before it had a chance to condense.
The surface area of the bulb in the cold airflow above the engine gets the water out of the gases.
As engines aged some oil started to make it into the mix.
Not sure about orientation with the no drain one, they seem to be oriented with the nipple ~ 4:00-5:00 on the factory built engines. |
The later style without the drainpipe down to the crankcase, was available with either 12½ mm or 19 mm diameter hose-connection spigots, of which my family's 1973 VW 1600 Type 2's AD-Series engine was originally equipped with the variety having a 12½ mm diameter hose-connection spigot.
I think this VW Type 1 style engine's oil-filler cum crankcase breather with 19 mm diameter hose-connection spigot, was used on the later engines equipped with an alternator & paper-element air cleaner.
I substituted one on my family's 1973 VW 1600 Type 2, in order to incorporate a VW-Audi oil-mist separator, which had 19 mm diameter hose-connection spigots.
Forum Index > Accessories/Memorabilia/Toys > Engine-crankcase oil-mist separator for VW air-cooled engines
https://www.thesamba.com/vw/forum/viewtopic.php?t=804920
The VW-Audi oil-mist separator (VW-Audi Part No. 052 103 495) took the form of a two-piece, heat-welded, moulded-plastic, internally-baffled, cylindrical canister, with offset 19 mm diameter x 20 mm long hose-connection spigots at either end.
These VW-Audi oil-mist separators (VW-Audi Part No. 052 103 495), are still listed as available from Volkswagen Classic Parts in Germany, priced at €39•49.
https://www.volkswagen-classic-parts.com/en_de/contact.html
https://www.volkswagen-classic-parts.com/catalog/en_de/part/05210349
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Much modified, RHD 1973 VW "1600" Type 2 Westfalia Continental campervan, with the World's only decent, cross-over-arm, SWF pantograph rear-window wiper
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Last edited by NASkeet on Sun Aug 17, 2025 12:20 pm; edited 1 time in total |
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mikedjames
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| Posted: Sun Aug 17, 2025 12:02 pm Post subject: Re: Oil Filler Styles ??? |
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My October 1973 built 1600 DP has the filler that Nigel shows but with an oil bath air cleaner and an alternator.
On that I usually put the breather connection about 2 o'clock to keep it and the breather hose out of the way of whatever funnel I am using to top up the oil.
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