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George Evans Samba Member

Joined: November 18, 2005 Posts: 632 Location: Flowery Branch , Ga
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Posted: Sat Sep 01, 2007 12:04 pm Post subject: Timing Marks on Stock Pulley |
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I seem to get myself confused every time i tune up my vw's a stock 74 & 73. The Crankshaft pulley has two different types of marks. The marks in the forward engine side are deeper "v" shaped notches. The mark on the outer rim of the pulley to the back of the car is a wider shallower mark. I have always assumed the wide mark to be TDC & the "v" mark more a timing mark.
Doe's this sound correct? |
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Glenn  Mr. 010

Joined: December 25, 2001 Posts: 78557 Location: Sneaking up behind you
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Posted: Sat Sep 01, 2007 12:07 pm Post subject: |
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This should help.
_________________ Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"
Member #1009
#BlueSquare
עַם יִשְׂרָאֵל חַי |
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keifernet Samba Search & Rescue
Joined: May 11, 2002 Posts: 19395 Location: Samba Center for Behavioral Science
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Posted: Sat Sep 01, 2007 12:15 pm Post subject: |
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Yep... dimple is TDC...
I have never seen a pulley with all the marks on it like in Glenns pic though... most of the time you either see the notch to the left of the dimple which is 5 ATDC ( orginally a DVDA distrubutor) or a single notch to the right which is 7.5 BTDC ( SVDA) VW did produce at least 5 pullies with different notches in them that I know of... maybe more.
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George Evans Samba Member

Joined: November 18, 2005 Posts: 632 Location: Flowery Branch , Ga
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Posted: Sat Sep 01, 2007 12:16 pm Post subject: |
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Thanks Glenn, That's as i thought. So in theory if i run the engine up to 3500rpm with stock dissy the Tdc mark should move 28-30 deg. to the left using a strobe? |
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Bashr52 Samba Member

Joined: July 16, 2006 Posts: 5667 Location: On an island in VA
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Posted: Sat Sep 01, 2007 12:34 pm Post subject: |
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Nope the stock mark is for timing at idle, not max advance. |
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George Evans Samba Member

Joined: November 18, 2005 Posts: 632 Location: Flowery Branch , Ga
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Posted: Sat Sep 01, 2007 12:43 pm Post subject: |
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Yes i understand about the existing notch. If you added a mark 1.8" to the right of TDC or 30 deg should that be the max advance at 3500rpm? |
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glutamodo  The Android

Joined: July 13, 2004 Posts: 26448 Location: Douglas, WY
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Posted: Sat Sep 01, 2007 3:17 pm Post subject: |
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keifernet wrote: |
Yep... dimple is TDC...
I have never seen a pulley with all the marks on it like in Glenns pic though... |
I have, but not from the factory. That image is actually derived from a picture I put together of a pulley I made those marks on myself. ATK/Vege rebuilt motors come with all those marks on them, but the notches aren't as nice as the ones I made. No I made those marks just to illustrate the common timing mark locations in relation to one another.
If you've ever seen the John Muir "Idiot Book" it has a good chart that shows the timing marks as well, I scanned a snippet of that chart before:
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jamesdagg Samba Member

Joined: August 18, 2007 Posts: 3364 Location: B.C.Canada
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Posted: Sat Oct 06, 2007 2:02 am Post subject: |
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Print, cut out and draw marks on your pulley where needed.
Last edited by jamesdagg on Thu Jan 01, 2009 9:26 pm; edited 1 time in total |
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lewis71bug Samba Member

Joined: November 01, 2006 Posts: 487 Location: Dayton, Ohio
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Posted: Sat Nov 17, 2007 7:34 pm Post subject: |
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This is the pulley (stock) on my engine:
It has the three 'v' notches on the rear of the pulley, but no dimple that I can find (that dark spot on the front of the pulley is just a dark spot, not a dimple). Which of the 'v' notches is TDC, or is mine supposed to have dimple between the first and second 'v'?
Wayne _________________ Wayne
71 Super Beetle (in the states)
72 Super Beetle (european)
73 euro Bay camper (type 1 engine) |
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wcfvw69 Samba Purist

Joined: June 10, 2004 Posts: 13640 Location: Arizona
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Posted: Sat Nov 17, 2007 9:23 pm Post subject: |
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lewis71bug wrote: |
This is the pulley (stock) on my engine:
It has the three 'v' notches on the rear of the pulley, but no dimple that I can find (that dark spot on the front of the pulley is just a dark spot, not a dimple). Which of the 'v' notches is TDC, or is mine supposed to have dimple between the first and second 'v'?
Wayne |
It's the V on the far left. It goes 0,7.5 and 10 degrees or left to right o, 7.5 and 10.
The picture of the pulley with the dimple that Glenn posted is not original VW. _________________ Contact me at [email protected]
Follow me on instagram @sparxwerksllc
40+ years of VW repair, and VW parts and vehicle restoration experience.
The Samba member since 2004.
**Now rebuilding throttle bodies for VW's and Porsche's**
**Restored German Bosch distributors for sale or I can restore yours**
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Last edited by wcfvw69 on Wed Jan 09, 2008 9:39 pm; edited 2 times in total |
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elektronikbadger Samba Member
Joined: January 07, 2008 Posts: 5 Location: Virginia Beach, VA
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Posted: Tue Jan 08, 2008 7:03 pm Post subject: |
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What about those of us who don't have the "dimple"??? Is there a way to tell if we have the proper pulley (other than pulling the dizzy or checking the valves? |
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glutamodo  The Android

Joined: July 13, 2004 Posts: 26448 Location: Douglas, WY
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Posted: Tue Jan 08, 2008 11:34 pm Post subject: |
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Well, checking the valves won't tell you exact TDC anyway. You'd have to pull a spark plug, put something into the cylinder to touch the cylinder and watch it as goes on either side of TDC (turning the engine over gentlry on either side of TDC that is) to visually see where TDC is. |
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keifernet Samba Search & Rescue
Joined: May 11, 2002 Posts: 19395 Location: Samba Center for Behavioral Science
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Posted: Wed Jan 09, 2008 7:14 am Post subject: |
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elektronikbadger wrote: |
What about those of us who don't have the "dimple"??? Is there a way to tell if we have the proper pulley (b |
And pulling the distributor does not tell you anything either...
AFAIK only the 71 and later pulley's ( like in my picture posted earlier in this thread) have the "dimple" Some models were notched 5 ATDC for DVDA and others 7.5 BTDC for SVDA
This has always caused problems for owners or ill informed/non VW mechanics when an 009 or any other distributor besides the correct one was installed and the timing set to the factory marks on the pulley.
If yours has just notches and no dimple it is an earlier ( or possibly aftermarket) pulley and you can use a chart in one of the manuals ( like glutamodo posted part of one above) to find what marks on your pulley mean. BUT you still have to time it for the distributor you are using. |
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elektronikbadger Samba Member
Joined: January 07, 2008 Posts: 5 Location: Virginia Beach, VA
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Posted: Thu Jan 10, 2008 5:50 pm Post subject: |
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Is there any part numbers on the back of the pulley? Mine has one single mark and a VW logo almost directly below it on the face (I'm guessing it's 7.5 BTDC based on the engine code) but I'd like to be sure. it seems to me that my dizzy drive gear is not in the correct position and I'd like an easy way to find TDC so I can actually check it.
A degree pulley is always an option... but it takes away from the stock look. |
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glutamodo  The Android

Joined: July 13, 2004 Posts: 26448 Location: Douglas, WY
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Posted: Thu Jan 10, 2008 6:53 pm Post subject: |
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No part numbers on the crank pullies, just that VW stamp usually. |
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Video Bob Samba Member

Joined: November 03, 2005 Posts: 261 Location: Bishop, GA
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Posted: Sat Feb 09, 2008 7:01 am Post subject: |
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The dizzy rotor does not have to be in the exact position as shown in most illustrations. A stock dizzy will have a very faint mark or indentation along the top of the dizzy where the cap sits. The rotor button should point to that mark when the #1 cylinder is at TDC. _________________ Ya can't have too many Vdubs!
1956 Oval
1966 Beetle
1974 Thing
1974 Super Beetle
1976 Westy P22 |
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BrockGrimes Samba Member

Joined: September 18, 2006 Posts: 1015 Location: Clovis, NM
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Posted: Tue May 06, 2008 7:30 pm Post subject: |
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I have a '72 super with the single dimple in front and a notch to the left for 5 ATDC.
On the pulley is stamped the VW circle and a big letter D.
What's the D mean?
Does it have a meaning? _________________ Selling the SB:
http://www.thesamba.com/vw/classifieds/detail.php?id=557335 |
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glutamodo  The Android

Joined: July 13, 2004 Posts: 26448 Location: Douglas, WY
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Posted: Tue May 06, 2008 8:25 pm Post subject: |
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I don't know what the D meant for sure, but it was on more than just one variety of timing-marks pulley. |
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wcfvw69 Samba Purist

Joined: June 10, 2004 Posts: 13640 Location: Arizona
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Posted: Tue May 06, 2008 9:44 pm Post subject: |
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BrockGrimes wrote: |
I have a '72 super with the single dimple in front and a notch to the left for 5 ATDC.
On the pulley is stamped the VW circle and a big letter D.
What's the D mean?
Does it have a meaning? |
Deutschland? _________________ Contact me at [email protected]
Follow me on instagram @sparxwerksllc
40+ years of VW repair, and VW parts and vehicle restoration experience.
The Samba member since 2004.
**Now rebuilding throttle bodies for VW's and Porsche's**
**Restored German Bosch distributors for sale or I can restore yours**
**Restored German Pierburg fuel pumps for sale or I can restore yours**
**Restored Porsche fuel pumps or I can restore yours**
**Restored Porsche distributors or I can restore yours** |
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glutamodo  The Android

Joined: July 13, 2004 Posts: 26448 Location: Douglas, WY
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Posted: Wed May 07, 2008 2:52 am Post subject: |
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Yeah, I was thinking that might be it. Or I wonder if it's a size code they used once they changed the diameter of the pulley early in the 40HP era. |
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