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Mustang Forums
2011-2014 Mustangs
Engine/Tuning
2012 Mustang 5.0 Coyote Motor
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<blockquote data-quote="Silbult14" data-source="post: 16447755" data-attributes="member: 179221"><p>If you really want to do this right you will first need really good quality accurate tools. Measure the outside diameter of each rod and main bearing journal on the crankshaft at 90 degree intervals for roundness and check the edges of each journal at the same 90 degree intervals for taper. They should be as perfectly round and free of taper as possible. .0001-.00015 from perfect is PROBABLY OK. Next using a dial bore gauge measure the inside diameter of each rod and main bearing using the same method. Subtract the crank journal dimensions from the bearing dimensions and you have your clearances. This is time consuming and tedious, but if you want it right this is the way to do it.</p></blockquote><p></p>
[QUOTE="Silbult14, post: 16447755, member: 179221"] If you really want to do this right you will first need really good quality accurate tools. Measure the outside diameter of each rod and main bearing journal on the crankshaft at 90 degree intervals for roundness and check the edges of each journal at the same 90 degree intervals for taper. They should be as perfectly round and free of taper as possible. .0001-.00015 from perfect is PROBABLY OK. Next using a dial bore gauge measure the inside diameter of each rod and main bearing using the same method. Subtract the crank journal dimensions from the bearing dimensions and you have your clearances. This is time consuming and tedious, but if you want it right this is the way to do it. [/QUOTE]
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