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jamesjedi's Avatar
 
Join Date: Aug 2004
Location: The Brink
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TDC Usuing Z1 vs Calculated

I am trying to determine what the difference is between the TDC using the Z1 mark versus the calculated TDC? The Z1 mark must be out sometimes, or am I missing something?

Old 12-20-2017, 05:27 PM
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Originally Posted by jamesjedi View Post
I am trying to determine what the difference is between the TDC using the Z1 mark versus the calculated TDC? The Z1 mark must be out sometimes, or am I missing something?
From my understanding the Z1 is only TDC for #1 and #4.
Old 12-20-2017, 06:28 PM
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I’ve checked true TDC with piston stop device and dial indicator vs Z1 mark on two engines and they were dead on. Still not a bad idea to check.

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Old 12-20-2017, 06:48 PM
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