and remember this.
the feeler gauge goes between the cam lobe and the follower, NOT between the follower and the top of the adjuster nut!
with a 240, if it has the metal fan and no clutch, you can turn the motor over with the fan blade, if your alternator belt is good and tight.
it's not a good idea to use the power steering bolt to turn the motor this many times, a starter bump switch is the simplest way to get the motor where you want it.
unfortunately, most 240's don't have the starter junction block on the fender, so placing the bump switch requires reaching the starter solenoid.
if you have never adjusted the valves or been inside the motor. I HIGHLY recommend getting a 7 dollar starter bump switch or remote starter switch... use it to bump the starter putting the cam into position.
it's not super important where the cam lobe points as long as it's not pointed at the valve@!

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!