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boyt911sc boyt911sc is online now
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Join Date: Mar 2002
Location: Philadelphia, PA
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Timing sprocket alignment.........

Quote:
Originally Posted by mb911 View Post
Its been about 10 years since I rebuilt a 911 engine and was aligning the sprockets tonight right side is right on with 3 shims. For left side waynes book references adding 54mm to the measurement to determine alignment.. What am I missing here? That doesn't make sense wouldn't I want to subtract? Any guidence for a guy relearning?


Ben,

The left sprocket (1-2-3 cylinders) alignment distance is 98.07 mm (+/- 0.25).
The right sprocket (4-5-6 cylinders) alignment distance is 43.27 mm (+/- 0.25).

The difference between left and right sprockets alignment distances is 54.8 mm.

The Bentley SC shop manual has a very nice diagram for reference. HTH.

Tony

Last edited by boyt911sc; 06-06-2018 at 02:59 AM..
Old 06-05-2018, 07:53 PM
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