Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
The keyway on the crank lines up with the mark on the chain housing when the timing chain cover is off. The holes in the cam gears will be pointing down to the 6 o'clock position and you can temporarily install a 5/16 bolt in each hole until if fits into the hole in the chain housing. Make sure there is no slack in the chain between the two cam gears. If there is slack with the guide installed, turn the back gear forward and the front gear rearward until you remove the slack. There should be no slack in the chain on the right side between the crank and the intake cam gear. The crank mark may not line up exactly when it is timed correctly. It may be just to the right of the mark when all the slack is removed. Once you're sure there's no slack in the chain as described above, install the remaining guides if they are not already installed and then install the tensioner and shoe. Unload the tensioner by pushing it in to release it. It should then release and take out all the slack on the left side of the chain. Don't forget to remove the bolts that are holding the cam gears still.
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