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Mon May 21, 2007 3:23 pm

I have a 71 super, dual port 1600 with the auto-stick. My question is about timing. The crank pulley has one notch in it. Is this notch 7.50 degrees btdc or is it tdc?

Mon May 21, 2007 5:05 pm

The v-notch on the front rim (front is front) is 7.5 btdc. The dimple across from it on the back rim is tdc.

Mon May 21, 2007 5:13 pm

By saying [front is front] do you mean the side toward the engine? Mine has the little notch on the pully half next to the engine. There is not one on the outer side.

Mon May 21, 2007 5:21 pm

Front meaning toward the front of the car. You're going to see that phrase a lot around here. So yes, as it relates to the pulley, front is toward the engine. Normally you'd see a round dimple on the back edge. Here's a photo I found in the gallery, your pulley might not have all the marks.

Mon May 21, 2007 5:32 pm

Thanks for the pic. The pully on my trike is like that but they left the dent off the one on the car, I guess. Thanks again.

Mon May 21, 2007 5:32 pm

Don't assume you have the correct pulley on your engine.

Mon May 21, 2007 5:35 pm

Right. Ha. Ha. Great thing about so many interchangeable parts.

Mon May 21, 2007 5:48 pm

Actually from the factory that notch would have been at 5º ATDC.

Mon May 21, 2007 6:00 pm

Pull number 1 spark plug and the top off the distributor. rotate engine what you think is TDC and put a pencil in number 1 spark plug hole now contiue to rotate engine while holding the pencil or a small screw driver.
make a not where the pencil stops its rise out of the spark plug hole look at pulley, how accurate is it?

Mon May 21, 2007 6:03 pm

Thanks, I'll do that.

Sun Jun 03, 2007 4:49 pm

Hi ya'll. Hope you mind if I jump in on this line. I have the notches on the pulley, did the pencil trick to verify and my mark is right on. Unfortunately, my distributor doesn't line up with the rim notch to indicate #1 firing. It's about 1/2 inch further around past the notch. I would imagine I have a 009, just by the single vacuum advance, otherwise, I've no clue. Do I mess with the distributor (?) or is this correct? It's not lined up like any pictures I've seen.

Sun Jun 03, 2007 4:58 pm

gt1953 wrote: Pull number 1 spark plug and the top off the distributor. rotate engine what you think is TDC and put a pencil in number 1 spark plug hole now contiue to rotate engine while holding the pencil or a small screw driver.
make a not where the pencil stops its rise out of the spark plug hole look at pulley, how accurate is it?

The pencil is not needed.

All factory pulleys will have a TDC mark. The question is are you on #1 or #3. To find out remove both valve covers. Put a wrench on the alternator/generator nut and rotate the engine until the TDC mark is in line with the case seam. Then have someone rock the engine back and forth as you observe the valves on #3. If they move then you are on overlap on TDC for #1. If the valves for #1 move then you are on TDC for #3.

Sun Jun 03, 2007 5:42 pm

[quote="Glenn" Put a wrench on the alternator/generator nut and rotate the engine until the TDC mark is in line with the case seam. Then have someone rock the engine back and forth as you observe the valves on #3.[/quote]

Will the whole car rock back and forth or just the engine, I'm confused. Can I listen to rock music while doing this ???

Sun Jun 03, 2007 5:45 pm

Zundfolge1432 wrote: Will the whole car rock back and forth or just the engine, I'm confused. Can I listen to rock music while doing this ???

:roll:

Rock the engine. You want to turn the crank, so it turns the cam so the lifters move the pushrods which move the rocker arms and open and close the valves.

Wed Apr 23, 2008 9:43 am

This was probably just answered but why does the dimple on my pully not line up with the split in the case when my distributor rotor is lined up with the notch in the distributor body.

I followed the directions on this site for valve adjustment and disregarded the fact the dimple was not lined up with the split in the case and lined the rotor up with the filed mark on the distributor body.

http://www.glenn-ring.com/tech/valve_adjustment.htm

So the question is, did I set my valves wrong?

Tue Aug 19, 2008 6:16 pm

that is prob because most vw are set to 10 degrees advance with a timing light look at the dis as a whole and divide it out in your head 100% 50% 25%10% the mark is prob about 10 % away from the rotor .. when your mark on the pully is lined up

Tue Sep 30, 2008 8:17 am

Lots of good info on the TDC topic, but everything I've read seems to imply that the dist. is already installed when trying to find TDC.

How do you find TDC if you're installing a new distributor and can't be sure that the crank has moved since installation.

As a side note, if my lower pulley has the 360 degree marks, can I assume that when it shows 0 at the top, I am at TDC?

TIA,
Len

Sat Oct 04, 2008 3:18 pm

To set Dizzy on unknown motor watch the #2 exhaust valve as the engine is being hand cranked clockwise. When the #2 exhaust starts to move you are approaching TDC on #1