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B18B1 Crank journal measurements just shy of Minimum spec

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Old 12-16-2014, 09:39 PM
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Default B18B1 Crank journal measurements just shy of Minimum spec



Minimum for rod journals : 44.98
Minimum for main journals : 54.98

--MY-- measurements
All rod journals measured from 44.93-44.98
All main journals measured 54.93-54.98

Would you use this crankshaft? The Motor ran and spun freely. No scoring on the crank.

Thanks
Old 12-17-2014, 02:35 AM
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Default Re: B18B1 Crank journal measurements just shy of Minimum spec

how do u measured it?
Old 12-17-2014, 08:04 PM
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Default Re: B18B1 Crank journal measurements just shy of Minimum spec

harbor freight micrometer =/
Old 12-18-2014, 04:39 PM
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Default Re: B18B1 Crank journal measurements just shy of Minimum spec

throw in the old bearings and plastigage. this will give you an idea of what colors give what tolerances. its a cheap way to doublecheck your measurements.

i wouldnt run any bearing in a performance b series at less than .0014-.0015", and try to say under .002" unless its a very high hp or revving motor
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