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Aaron Cox CT Samba Member
Joined: August 13, 2023 Posts: 23 Location: CT
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Posted: Fri Jul 11, 2025 10:14 am Post subject: 1972 Type 4 distributor drive gear installation |
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Good afternoon all!
I am finishing up reassemble on the 1972 type 4 engine for my bus.
I have the bently manual and have also searched the sight and i think I have confused myself even more.
The engine is at #1TDC.
The distributor gear's "groove" that the distributor engages isnt centered. Looking in the bently manual i dont see any indication of which way the wider half circle should be...
Also looking at the bently manual the photos seem different then how ratwells post shows installing the gear. (Im guessing its just the perspective of the photos)
Which way should it be installed?
Or
Or neither?
As always thanks so much for all your help!
Aaron |
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Aaron Cox CT Samba Member
Joined: August 13, 2023 Posts: 23 Location: CT
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Posted: Fri Jul 11, 2025 10:55 am Post subject: Re: 1972 Type 4 distributor drive gear installation |
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Hmmmm So after looking at my distributor im thinking that this may be the correct orientation, the "little c" towards the flywheel?
I am running a vacuum assist distributor.
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kreemoweet Samba Member
Joined: March 13, 2008 Posts: 4090 Location: Seattle, WA
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Posted: Fri Jul 11, 2025 11:30 am Post subject: Re: 1972 Type 4 distributor drive gear installation |
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Bentley Manual, Engine&Clutch section, page 24, fig. 8-2. _________________ '67 bug: seized by the authorities
'68 bug: seized by the authorities
'71 kombi: not yet seized by the authorities
Stop dead photo links! Post your photos to The Samba Gallery! |
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Aaron Cox CT Samba Member
Joined: August 13, 2023 Posts: 23 Location: CT
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Posted: Fri Jul 11, 2025 11:40 am Post subject: Re: 1972 Type 4 distributor drive gear installation |
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But I cant figure out which way that photo is showing the off-center slot.
Does the bigger half go towards the flywheel or the fan? |
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lil-jinx Samba Member
Joined: August 14, 2013 Posts: 1568 Location: New Brunswick,Canada
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Aaron Cox CT Samba Member
Joined: August 13, 2023 Posts: 23 Location: CT
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Posted: Fri Jul 11, 2025 11:59 am Post subject: Re: 1972 Type 4 distributor drive gear installation |
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Ahhhh...that drawing really helped! THANK YOU!
And what manual is that!! Thats fantastic!!
This forum is the absolute best! |
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lil-jinx Samba Member
Joined: August 14, 2013 Posts: 1568 Location: New Brunswick,Canada
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virusdoc Samba Member
Joined: August 13, 2018 Posts: 626 Location: Alton, IL, USA
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Posted: Fri Jul 11, 2025 12:19 pm Post subject: Re: 1972 Type 4 distributor drive gear installation |
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Be sure the washers that go underneath that pinion drive are still in place. Ideally this installation is done with the case open (and then a distributor installed to keep it in place) so you can ensure they don't fall down into the case. _________________ 1976 Convertible Super Beetle, "June Bug".
Self-rebuilt 1904
1976 Campmobile 2.0L FI, "Kermit" |
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Willin Samba Member

Joined: October 10, 2019 Posts: 258 Location: Bozeman Mt
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Posted: Fri Jul 11, 2025 12:19 pm Post subject: Re: 1972 Type 4 distributor drive gear installation |
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You will notice the shaft turns a little as it drops down in.
Allow for that. The picture in the book shows installed position.
Make sure the washer/spacer doesn't fall off the bottom of the shaft. Use a blob of heavy grease to "glue" it to the shaft. _________________ 73 bus. Org. 1700 with dual Weber 40 idfs, bus header with Empi qp muffler, CB magnaspark 2 " ready to run kit". |
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Aaron Cox CT Samba Member
Joined: August 13, 2023 Posts: 23 Location: CT
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Posted: Fri Jul 11, 2025 12:49 pm Post subject: Re: 1972 Type 4 distributor drive gear installation |
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Thanks for all the tips! Here goes nothin'
I'll let you know how it goes!
A. |
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Aaron Cox CT Samba Member
Joined: August 13, 2023 Posts: 23 Location: CT
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Posted: Fri Jul 11, 2025 12:58 pm Post subject: Re: 1972 Type 4 distributor drive gear installation |
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Whooo Hooo...I think it went as smooth as butter!
One more puzzle piece down!
Thanks all! |
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Wildthings Samba Member

Joined: March 13, 2005 Posts: 52301
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Posted: Sun Jul 13, 2025 11:53 am Post subject: Re: 1972 Type 4 distributor drive gear installation |
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Aaron Cox CT wrote: |
Whooo Hooo...I think it went as smooth as butter!
One more puzzle piece down!
Thanks all! |
Hope you had the crankshaft turned to the correct TDC. If you used the incorrect one your engine will not start and run, but you can correct matters by moving the wires 180° around the cap. |
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germansupplyscott Samba Member

Joined: May 22, 2004 Posts: 7247 Location: toronto
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Posted: Sun Jul 13, 2025 4:24 pm Post subject: Re: 1972 Type 4 distributor drive gear installation |
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virusdoc wrote: |
Be sure the washers that go underneath that pinion drive are still in place. |
Type 4 engine has only 1 special washer. Type 1 has multiple washers. _________________ SL |
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