No, he is rocking the engine back and forth... NOT A GOOD IDEA!!!!!

Only rotate it in the direction of travel. When rotating backwards, you are compressing the tensioner with the sudden tension on the slack side of the chain, and it looks like slop in the chain.

Button it up, fire it up, and listen for a funny ratling sound at 2,000 rpm. If none, shut it off, wait 30 minutes, then start it again. If no rattle at idle, you are good. If it rattles for about 2 seconds after startup, change the oil filter to one with a better anti-drainback valve, start, run, shut off, wait 30 minutes, then start. If no rattle, you are good... If it rattles at startup, replace the timing set.

"A young man who does not have what it takes to perform military service is not likely to have what it takes to make a living." - John F. Kennedy

Proud owner of an 88 Montero (with a blown engine).