[T3] First Steps Engine Reassembly

[William J]

 I was considering using the middle filler tube ( with nipple ) and the one 
large cap breather on my 73 which has the Positive crank case vent or PCV . 
Reason being the PCV is NLA . Yet I don't think the 73 oil bath will work 
proper since it has two hoses one from each head , their function is to only 
allow clean filtered air into the heads through push rod tubes into the case 
up to the breather . From there under the small cap sits the PCV the a hose 
to the IAD vaccum pipe . I never saw an early oil bath in person yet from 
what I've seen the beather nipple with hose fits to the air intake metal 
oval and has a sort off flap with metal weight . I don't know how this works 
. In my mind air entering the oil bath intake would have more suction if 
that is the proper word that if I were to attempt to use any one of the 
nipples on the 73 oil bath, those all are simply filtered air outlets. 1 is 
for the AAR 2 for the heads and 1 for the fuel vapor charcoal canister.

 I don't know the function of the flap on the early oil bath . I do know the 
nipple on the older oil bath creates a suction to draw in fumes from the 
breather .

 My PCV works yet is questionable and if it fails and or breaks since it's 
plastic then what. I have never seen the inside of the early oil bath so I 
don't know if it has the outer wall like the 73 that isolates suction and 
only provides filters air ,and do realize many may frown on changing my vent 
system . It's maily an emmisions device on a 72/73 to have a closed vent 
system and also the vacuum from the IAD FI system draws in oil fumes whcih 
tend to build up inside the IAD . The early system still draws oil fumes 
into the IAD yet perhaps at a smaller rate , I'm not sure.

William
----- Original Message ----- 
From: "Soren Jacobsen" <snj at blef.org>
To: <type3 at vwtype3.org>
Sent: Friday, July 06, 2018 10:53 PM
Subject: Re: [T3] First Steps Engine Reassembly


>> On Jul 6, 2018, at 9:36 PM, William J <catnine09 at dslextreme.com> wrote:
>>
>> When early and late oil filler tubes are refered to . Does this mean the 
>> early oil fill tube with the draft tube then  you talk about later tubes 
>> without the without the nipple . Does later also refer to to 2 cap 
>> breather because they don't have that hose nipple either.
>
> Ah, interesting. I've never had my hands on anything later than 1969, so 
> I'm unfamiliar with the 2 cap breathers (although I have one or two NOS 
> small caps that I accidentally bought a few years back).  Looks like I 
> shouldn't be referring to those different filler tube as early and late, 
> because it seems that the "early" tube started being used again starting 
> in 1972.  So really it's more like: 1. early/late and 2. middle.
>
> Early/late filler tube: 
> https://www.thesamba.com/vw/classifieds/pix/7795720.jpg
>
> Middle filler tube: 
> https://www.thesamba.com/vw/classifieds/pix/5468893.jpg
>
> Soren
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