Timing Chain Aligned...Then not... - TCCoA Forums
 
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post #1 of 10 (permalink) Old 07-16-2003, 07:59 AM Thread Starter
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Timing Chain Aligned...Then not...

Ok, I'm going to sound like a non-mechanical person here, but I'm just seeking a little reassurance....

I put the timing chains on my engine last night...Crank keyway at the 9:00 position. It wasn't too much trouble getting the bright links on the chain aligned with the timing marks on all the gears.

The moment of truth arrives when I slowly turn the crank, feeling for any valve to piston clearance. I feel none, and continue to turn the crank a full revolution. I look to see if the timing marks line back up. They don't, so I continue to turn, and turn, and turn, looking to get all the marks lined back up. I must have turned the crank 20 or 30 times, but the marks never did come back to the bright links.

I'm thinking at some point, if I kept turning the crank, the marks would have to line up eventually.

Does all this sound normal, or should I take the chains off and start over?

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post #2 of 10 (permalink) Old 07-16-2003, 09:56 AM
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I don't think they should line up after you've cranked it...it only matters when putting them on.




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post #3 of 10 (permalink) Old 07-16-2003, 10:14 AM
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The cam/crank marks will line up after like 10-15 revs but I don't think the chain links will line up tho.

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post #4 of 10 (permalink) Old 07-16-2003, 11:03 AM
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OK, I'm confused. Wouldn't the links have to line up after x amount of rotation.

They are connected by a chain and gears, right? Unless they jump a tooth or something, wouldn't they have to eventually line back up? If you follow the bright link from the top/cam gear, all the way down to the crank gear, then back up to the same location on the top gear again, wouldn't the bottom/crank bright link have to be in the same location?

Not arguing, but scratching my head trying to figure how they couldn't eventually line back up.

I’m following this post closely as I’ll be installing my gears/chains in the near future.

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post #5 of 10 (permalink) Old 07-16-2003, 11:56 AM Thread Starter
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I'm thinking they will eventually line back up, but after how many rev's, I don't know. I'm tempted to turn the crank in reverse to undo what I did last night, just for my own reassurance. Since there didn't seem to be any interference between the valves and the pistons, I still think I got it right, but I just want to double check myself.

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post #6 of 10 (permalink) Old 07-16-2003, 12:37 PM
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post #7 of 10 (permalink) Old 07-16-2003, 12:37 PM
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Yes they will come back after A LOT of revolutions. Now dont take this as you did it right, I dont know that, but rest assured the links will line up again eventually if you did it correct. I would say if you have turned it a few times with no clearance issues, then you should be OK.

I turned mine over till everything lined up again. Took me FOREVER.

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post #8 of 10 (permalink) Old 07-16-2003, 05:15 PM
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As did I. They do line up after a long long time.

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post #9 of 10 (permalink) Old 07-16-2003, 07:44 PM
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Quote:
Originally posted by chadg
As did I. They do line up after a long long time.
I would like to add to that.........LONG LONG LONG LONG LONG TIME.
There is a ratio involved here and the number of links in the chain plays a part not just the number of teeth. It's like a 'hunting" tooth ratio where they don't want to develope a wear patern. Take a rear end and mark two teeth as they meet then see how many time you have to turn it for them to line up again.........LOTS.
Same idea.

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post #10 of 10 (permalink) Old 07-16-2003, 09:52 PM Thread Starter
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Thanks guys....I appreciate the feedback. I put the cover back on assuming that I had things lined up OK. My arm was starting to hurt from so much crank turning. Now I know what the deal is....

Glen "RustyUL" Weldon

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