Screwed up. Need advice

[Homeoboxter]

Originally Posted by Sand blister

5 chain in 1999.

Bank two on passenger side the one the faces down towards the ground.

That`s good, that means only one bank is affected, not both. What I would do is to remove all the green plugs (both banks) and check the timing of the camshafts with respect to the crankshaft while it`s at TDC. If they are off, or you can`t reinstall the tensioner, pull the scavange pump and loosen the four bolts on the sprocket. Mark them before you do this to have a reference. This will give you some room to to get everything in time. If you can`t get it timed with the tensioner in, you indeed jumped one or two teeth.

If that`s the case, you need to pull the sprocket completely, remove the tensioner, hold the chain with something to prevent its falling into the crankcase and lock the camshafts at TDC. Before doing this, to avoid piston to valve contact, I`d rotate the crankshaft a few degrees off TDC such that none of the pistons can contact the valves. Then I`d time the camshaft first, followed by rotating the crankshaft to TDC. Then try to reinstall the sprocket and the tensioner. I`m not sure this is doable if you remove the scavanging pump only, but the worst case scenario is that you need to pull the valve cover to get access. There are DIYs on how to do this with clamping down the camshafts, etc. This is what I`d do, maybe there`s a better way though. Obviously you need to rotate the camshafts very gently so you need some tool to do that. Note also that the timing marks on the camshaft on bank one and two have to be 180 degrees off relative to each other. Note also that the intake and exhaust camshaft are moving together driven by the small chain. Watch videos and inspect pictures of the camshaft assembly carefully before you proceed. Hope all this make sense. Good luck!