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Home >> Ford >> 2005 >> Freestar Base >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine System-General Information >> General Procedures >> Crankshaft Runout >> Measuring Runout

Measuring Runout

    NOTE: Crankshaft main bearing journals must be within specifications before checking runout.
    Fig 1: Measuring Crankshaft Runout
    G03933284Courtesy of FORD MOTOR CO.
  1. Use the Dial Indicator Gauge with Holding Fixture to measure the crankshaft runout.
    • Refer to ENGINE - 3.9L AND 4.2L article for the procedure.
    • Rotate the crankshaft and subtract the lowest dial indicator reading from the highest dial indicator reading to figure the crankshaft runout. If it is out of specification, install new components as necessary. Refer to ENGINE - 3.9L AND 4.2L article for the procedure.