Right timming mark

[supercrawler]

Which mark should i align?

(pic show driver side of pully)

 

[Dat Lurka]

:confused:

Is that an A motor or something?

:huh: Looks like someone filed it...

[supercrawler]

It's L1600 motor.

[jefe de jefes]

[DanielC]

The bigger mark is TDC. There are four smaller marks, 5, 10, 15, 20 crankshaft degrees BTDC and one mark 5 crankshaft ATDC

[banzai510(hainz)]

the 2nd notch near the top(biggest Notch) will be zero. In this photo.

Paint it white. or yellow

 

or paint the 10deg one white as most times using a timming light youll use that to adjust to using the pointer.

[supercrawler]

So,this is 10 deg mark? (Driver side)

 

10deg mark? Right??

[supercrawler]

[DanielC]

Yes, that is the mark for 10 degrees BTDC.

[supercrawler]

Thanks.

[datzenmike]

 

 

Yes, that is the mark for 10 degrees BTDC.

 

I'm not getting this.

 

If the crank turns upward (clockwise) then the advance numbers/notches should be 0 +5 +10 +15 +20 with 0 (TDC) at the bottom. The 3rd notch up would be +15 degrees before the 0 (TDC) rises up and passes the marker. Advance has to be ahead of the 0 mark

 

Because there are no numbers on the pulley it's possible that the notches are -5 0 +5 +10 +15 +20 (from bottom to top) .... This would give a +10 degree advance on the white.

[supercrawler]

I see your point,,

All the confusion was start from someone (look like) filed very bottom notch,

I think this is five notch pully.

[datzenmike]

Other L series have a single notch and the scale is bolted on the timing cover. The numbers on it are (from the bottom upward) +20 +15 +10 +5 0

[supercrawler]

like this.

[datzenmike]

Yes, it works the opposite of a stationery pointer and 4 (or 5) marks on the pulley.

 

Some of those pointers mount on the other side of the timing cover under the dizzy. If you can't time it maybe the pointer should be over there.

[DanielC]

Here is another picture, maybe it will help.

This is a real close up, slightly out of focus, but you can see one mark is bigger than all the others.

The big mark is Top Dead Center, TDC for short. The pulley turns clockwise, under the stationary pointer. This engine has not yet reached TDC, it is Before TDC, or BTDC for short. Each if the marks, big and little are 5 degrees apart. This engine is sitting at about 12.5 degrees before top dead center.

[banzai510(hainz)]

yes that the marks where you most likely want to set the timming light.

Just remeber the big mark is TDC if you ever want to aling the motor up to ck Cam timming marks or the dist alingment or oil pump alinghment

[Silky_Johnson]

My pulley has a bunch of weird notches on it. If I'm remembering correctly, it has five notches plus one WAY out at like 30 or 40 degrees or something. From what I had read, I always put TDC at the notch second from the bottom. What I learned from having the head off was that true TDC was right on the first notch, so I had been timing 5 degrees more advance than I thought. After some later inspection, I discovered that the TDC mark was only very slightly larger than the others -- not as drastic of a difference as DanielC's picture.

 

Like Hainz said, it would be good to verify with the cam and or distributor, but because of possible timing chain wear and such, I don't see how you could tell if it's spot on? I had to check mine by visual confirmation of the piston reaching TDC, with the timing cover and pulley still on. I was changing a head gasket... I just did it by blocking the chain tensioner and making sure it doesn't come out, pulling up on the chain with my hand, and then rocking the crank **slightly** back and forth until you're sure the piston won't go up any higher. Your pointer looks straight, so it should point right at one of your notches. Mine was a little bent, so I bent is back to be centered on one of the notches.