s i 442

When the timing chain and gears are installed on "0" and I put the two dots together, where is the #1 piston supposed to be, all the way up or about 3/4 down in the bore?

Macadoo

Okay, let's see if I remember.
O to O should put the #1 cylinder at TDC on the exhaust stroke. But that's how you want to install it. Just know that it's exhaust and not compression when stabbing the dizzy.

MDchanic

Mac is entirely correct, but I would ask: What do you mean, "¾ of the way in the bore"?

- Eric

s i 442

The longer i sit and think about it im pretty sure I lined up the wrong things because I used the "0" at the key way which was strait up and im sure it should have been pointing at about 2 o clock and that would made the piston TDC.

MDchanic

Yes, the crank key points at about 1:30 when the sprocket alignment mark is at 12:00.

That's why I recommend taking a photo of the timing gears before you button it up - saves guesswork later when your memory starts to get shaky.

- Eric

Macadoo

Photo coming up.....

TripDeuces

You can put it at mark to mark or 12 o'clock for each, doesn't matter

Macadoo

Maybe this will help?

[IMG][/IMG]

Macadoo

If you used the Edelbrock double roller it has "advanced" keyways as well as the O to O keyway. I think the others were marked R and A? It's recommended to use the O keyway.

s i 442

Yes that is exactly how it should have looked, I must have missed the real "0" and lined up the "0" that was on the key way indicating the "strait up" setting, because now I remember looking at the piston and it was down in the bore and not TDC.
Friday night I'll have to take the front cover back off and fix this!

s i 442

You should have seen how light the 0 was on the crank sprocket!
I was completely off on lining the dots up! I got it perfect now and back to where i was yesterday at this time plus I cleaned the hole in the bolt head that oils the timing chain, cleaned the oil pump pickup better and just feel alot better about it going back together this time.

timing chain close up.jpg

cutlassefi

That's not really what the term "straight up" means.

MDchanic

I was going to post this this morning, but I had to, y'know, like, go to work and stuff.

I did mine wrong the first time, too - if you look, you can see that there is a "0" right over the keyway on the small sprocket, and an identical "0" in the correct position.
I lined up the wrong one.
Fortunately, I degreed the cam, as one always should, and discovered that it was totally off. I kept looking at it and couldn't figure out what was wrong, then I stepped away for a while and came back and said "Ah ha!"
It's important sometimes to step away, because you can get too involved and miss stuff.
It was easy enough to fix, and of course it was right on when I re-degreed it.





- Eric

Macadoo

That sprocket has a lot of keyways

MDchanic

You can't have too many keyways.


And the super-adjustable one was only a few bucks more than the slightly adjustable one, and you never know when you might need more adjustment...

- Eric