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Old 06-23-2000, 08:26 PM
mbdoc mbdoc is offline
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Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
External balance means that all major rotating componets are balanced independant of each other. ie;crankshaft balanced by itself, not with flywheel & front damper bolted to it. Many of the newer engines don't even have front crank dampers, just hub w/pulley.
Most older engines had the crank assembly balanced together. Sometimes replacing flywheel would cause imbalance.
As long as each componet has dynamic balance it can be replaced on external balanced engine w/o complete disassembly.

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