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Originally Posted by Shern
Ah, a post-structuralist... 
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Was Socrates a post-structuralist?
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Do you have a better method?
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See below.
Quote:
Originally Posted by gmog220d
Oh, Poopy Poop!
As for the accuracy of the scale, I trust German engineering and manufacturing skills. Plus, on these engines those whacky Germans provided a way to adjust the pointer to match actual, for real TDC:
- Pull #1 injector and pre-chamber;
- Insert wood dowel rod into the hole 'til it rests on the top of the piston;
- Rotate engine at crank on compression stroke for #1 until the dowel indicates true TDC for #1;
- Check the pointer on the front of the engine for accuracy against the scale. If found to be inaccurate loosen its retaining bolt and adjust the pointer to indicate TDC; and
- Problem(s) solved. 
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The concept of the above described process is both correct and necessary. For the dowel substitute a dial indicator, note the crank position with the piston ~.100-.125" both before and after the presumed TDC, and split the difference. There will be a dead area of piston movement
+ 2.5-3 degrees at TDC where dowel movement will not be detected, hence the need for bracketing the piston position via the indicator.