Quote:
Originally Posted by Railcarmover
The fact remains,with poured bearings or precision insert bearings the assembler should insure the assembly has proper clearance. My experience with diesel and gas engine assembly,regardless of compression pressure or size of components a properly fit crankshaft to spec spins freely by hand.That is undeniable and anyone who takes part in assembling an engine with the crankshaft 'frozen' by the bearings displays poor workmanship. Any one who provides a service and is involved with a documentation of his services with the results as shown at the minimum failed to protect his interest,at the maximum displayed that he performs shoddy work and doesn't realize it..either way,its an indictment he freely submitted.
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But we know that ford infact did just this. In the haggerty video his crank is not frozen but requires 120ft lbs to turn.
"Ford spun engines in with an electric motor, they used an ammeter to determine the resistance value. Burnishing the mains,allowing the last step of fitting the bearings to the crankshaft itself through rotation."
good enough for 20+ million engine but not good enough for now? This is akin to saying rolling the cylinders is a shit method because the rings of today require a cross hatch. The bearings of today require the .0015. There is no break in for insert bearings there is just wear and failure. perfect or fail. Ford's methods and Ron's methods prove These Old engines do not need perfect to not fail.