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post #1 of 17 (permalink) Old 02-09-2014, 02:14 PM Thread Starter
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Replacing Timing Chain, Could Use Some Help

I'm in the middle of a timing chain replacement. I've been using ff drift lol 's very helpful post in the diy section.
Ive got 2 questions
1. At tdc compression stroke (with the orig. chain that is working) the cam sprockets are the opposite of what I read they should be. Meaning on the intake side, the exhaust diamond is at 2 o'clock. And on exhaust side the, the intake arrow is at the 10 o'clock position. Now I found the compression stroke by the fact that it's at tdc and all valves are closed. And if I were to go another 180* then it would be on the exhaust stroke, but the cam sprockets would line up how the book says they should on compression.
Am I crazy? Tdc with valves closed is the compression stroke, right?

2. I am confused by the process of activating a new chain tensioner.

Any help would be greatly appreciated.
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post #2 of 17 (permalink) Old 02-09-2014, 02:33 PM
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1. The key on the lower sprocket should be at 12 o'clock with the mark as shown.






2. Once the chain and tensionner are in place you just give a little tap to the plastic chain guide towards the tensionner and it will release

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post #3 of 17 (permalink) Old 02-09-2014, 04:24 PM Thread Starter
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Thanks for the reply. I haven't made it to activating the tensioner yet. I can't get the mofo out. Had to buy a 32 mm socket. Don't really have room for a cheater bar, and it must be torqued to a million.
And about the cam gears. That's the thing, when mine it at tdc compression stroke, the cam sprockets are the exact opposite of what is pictured. If I put them the way it is pictured, then its on the exhaust stroke instead of the compression stroke.
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post #4 of 17 (permalink) Old 02-09-2014, 04:46 PM
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You couldve just used an oil filter socket

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post #5 of 17 (permalink) Old 02-09-2014, 04:54 PM
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That socket should come with the car. lol

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post #6 of 17 (permalink) Old 02-09-2014, 04:55 PM
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theyre about $4 at any auto parts place

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post #7 of 17 (permalink) Old 02-10-2014, 07:44 AM Thread Starter
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Good to know. I haven't even changed the oil yet in this car, or I guess I would've had one. It's my dads new beater he got for really cheap, without talking to me. The oil was changed right before purchase. I did get the chain tensioner out with a long 1/2 breaker bar and 2 ft of cheater bar. MY GOD!

Can anyone offer any insight to the cam sprocket alignment?
Am I looking at the wrong piston, it seems obvious to me that the #1 be the closest to the timing chain, right? And again, all valves closed, piston at the top=tdc compression stroke. Why are my sprocket gears the opposite of what they should be.
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post #8 of 17 (permalink) Old 02-10-2014, 07:52 AM
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Thats just where it stopped. Turn the cams with a wrench until they are at rest where they need to be

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post #9 of 17 (permalink) Old 02-10-2014, 01:36 PM Thread Starter
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Um. No. That's at tdc compression stroke. That's the whole problem.

Now I'm more confused than ever. I removed the old chain. Thinking that I would just put it back together the way it came off. But the new chain has blue and purple links. The new chain has 16 links counting the colored ones that are supposed to line up on the sprockets. But when I look at my pick of it before I took it off, there are 19 links from mark to mark. WTF? It was running way to good to have jumped that much time. I went to the parts store to compare. They did give me the right chain kit.
I've looked at other pics online of l61s with the cam cover removed. I've seen both 19 and 16 links between cam gear marks. What gives?

And can you not just attach images on this forum? Cmon I can't even remember my photobucket password.
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post #10 of 17 (permalink) Old 02-10-2014, 03:33 PM
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Wish you'd at least tell us the year of the car, what engine you are working on and if it's even an ecotec. Pretty hard for us to help when we have to guess.

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