OK, Bart I was dead wrong about it being able to run if the cams are lined up like the TSB says but the crank is positioned so that #2 and #5 are at BDC instead of TDC. I diagrammed it out and it looks like in the #2 cylinder from 180 to 360 the exhaust valve would be opening while the piston was going toward TDC, so no prob there - then from 360 down to 540 the exhaust would be closing and the intake opening, no prob there either, but then on the next upstroke from 540 to 0/720 the intake would be open. Big problem! There would be no compression just the sound of air huffing back through the intake. Meanwhile, over in #5, the intake valve would be opening while the piston was going up from 180 to 360 so it would be huffing back through the intake too - then from 360 down to 540 both valves would be closed so it would be sucking air past the closed valves. The other pairs would be doing the same wacky stuff.

In other words, there would be no combustion, just a bunch of huffing and puffing and sucking noises. And maybe an occasional backfire. It would sound a lot like a Zumba Gold class without the music and the hot little instructor girl named Krista. Ah, but I digress... Bottom line is there's absolutely no way it would run if it were 180 off. It will only run one way. So if yours is running like it's supposed to then it's set up 100% right.

Now that I see that one little inconsistency is totally harmless I think you oughta leave the how-to up. It's too good of a write-up to keep under wraps. It would still be nice to have the how-to and the Isuzu instructions match but I don't see any harm in keeping it available with a caveat that if you've lost timing because of a broken belt or inadvertently turned the cams then don't refer to the how-to, use the TSB instead. Maybe next time someone does a timing belt change they'll line it up the Isuzu way before removing the belt and take some pics for you. Hey if I'm still around and able, in another 80K miles I'll take pics not only of the crankshaft sprocket but also the cams. It will be time to check clearance so the valve covers will have to come off.

Sorry if I gave you a scare there - shoulda diagrammed it out before running my mouth I guess. Just can't trust this worm-eaten brain anymore!