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nope. don't ever use the cam bolt to turn the motor over.
the tension will be wrong, and you could damage the tensioner.
best is the crank bolt, on a 240, you can use the fan and a clean tight belt to marginally rotate the motor. or of course, the starter...
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Sorry about that I am probably calling it the wrong thing....
I am talking about the bolt the chilton manual refers to in the valve adjustment section in chapter 1. Its in the garage but I am sure you know what I mean. Its probably the crank shaft bolt.
I bought a 23 mm for the bolt. It fits but seems a bit loose. I tried turning but wasn't sure of the direction so stopped since I am waiting on my gasket and wrenches still. It might possibly be 22mm or its the lack of mm to mm consistency I have read about when talking about US tools versus German tools/bolts.
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If your valvetrain was doing that (I take it that's what you were getting at), you'd hear it. A lot. You're fine.
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Yes, thats what I was worried about. This is my first diesel and I have no experience with others. My engines sounds a bit clanky ( A metalic clank clank noise). So I was worried when I saw those marks and thought it could have been related to the noises. Its good to know its not.
I plan on doing a compression test after valve adjustment to see if its a miss or something else. In the end it could just be the sound of a diesel engine.