Runout

PROCEDURES
1. Support the crankshaft in V-blocks on the end main bearing journals.
2. Set up Dial Indicator with Bracketry TOOL-4201-C or equivalent to read on the center main bearing journal. Be sure that the journal surfaces are smooth.
3. Rotate the crankshaft one revolution. Note the maximum variation of the indicator reading. This is the runout of the crankshaft in the center or amount of bow. Consider out-of-round journals when measuring runout.
4. Mark the crankshaft at its high or low reading position.
5. Support the crankshaft on the center and on one end journal. Repeat the above procedure, taking the reading on the unsupported end journal. Record this reading.
6. Repeat the last step on the opposite end journal.
7. Study the above readings and marks, to know if, where, and how much the crankshaft is bent. Journal runout limit is 0.03mm (0.0012 inch) when inspected with a dial indicator with the crankshaft in V-blocks.