I wish I had a computer, I could email you the GM service info on camshaft timing. But as it stands I only have my phone. Timing the camshafts on an typical Ecotec is dirt simple. Just for reference, look at the main chain and you will see 2 "red" links and one " grey" link. Those are the chains alignment marks. The cam gears should be marked int or exh. With the gear on the shaft facing the front of the engine the intake cam gear mark should be at about the 2 or 3 o'clock position. The exhaust should be at about the 10 to 11 o'clock position. The cams will more or less rest where they need to be to be timed. You will need to move the cams around a hair to get them to line up spot on though. The crank timing mark will be at about the 5o'clock position.
1. Put the crank @ TDC cylinder #1 (mark @ 5 o'clock)
2. Install and line up the "grey" link on the chain to the intake cam gears mark
3. Line up the "red" link at the crankshaft
4. Install and line up the last "red" link on the chain to the exhaust cam gears mark.
5. Reset and install the timing chain tensioner
6. Take one last look make sure everything lined up and tap the tensioners chain shoe with a plastic or rubber tool to activate the tensioner.
7. Rotate engine over to take up chain slack. BE AWARE, the links and marks WILL NOT line back up, so dont worry when they don't.
As a side note I've never had to do the balance shaft chain. Dont know how to time it. Also the head, crank, and cam gear bolts are all torque to yield so dont reuse them.
2006 LS coupe, manual, Victory Red
To date best 15.402 at 90 mph
"No friend ever served me, and no enemy ever wronged me, whom I have not repaid in full."
Lucius Cornelius Sulla
Last edited by montecarloman; 05-13-2011 at 11:25 PM.