Quote:
Originally Posted by JFP in PA
Because I would be willing to bet if he has the cams out, he also has the tensioners out as well (it would be real interesting to try and remove the cams on one bank without releasing the tensioners), which means the remaining long chains are slack and potentially able to slip during rotation.
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I rebuilt the engine from scratch about a year ago and as far as I remember there are three tensioners in these engines, one for the crankshaft to IMS chain and one for each of the banks. For pulling the camshafts on one bank you only need to remove one tensioner that corresponds to that bank. The other bank has a separate one on the other side of the engine and that can be left intact. The two long chains corresponding to the two banks run on the opposite ends of the IMS, so it`s very hard to mess with the other bank`s chain. So you can even pull the entire head off on one side and still can rotate the crankshaft safely if everything else is intact on the other bank. Obviously you need to hold the chain so it won`t get stuck in the crankcase. If he removed both (or all three) tensioners, then yes, turning the crankshaft over can be problematic... But if he started with removing all tensioners for no reason without setting the timing I`m not sure he should proceed with this job..
