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Home >> Ford >> 2018 >> Mustang GT, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 131 (ENGINE - 2.0L ECOBOOST (184kW/250PS) - MI4) >> General Procedures >> Balance Shaft Backlash

Balance Shaft Backlash

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Special Tool(s) / General Equipment 

GFD277162Courtesy of FORD MOTOR COMPANY
 100-002 (TOOL-4201-C) Holding Fixture with Dial Indicator Gauge
GFD277461Courtesy of FORD MOTOR COMPANY
 303-507 Timing Peg, Crankshaft TDC TKIT-2001N-FLM TKIT-2001N-ROW

Check 

  1. Install the special tool and rotate the crankshaft slowly clockwise until the crankshaft balance weight is up against the Crankshaft TDC Timing Peg. The engine is now at TDC. Use Special Service Tool: 303-507 Timing Peg, Crankshaft TDC.
    GFD277462Courtesy of FORD MOTOR COMPANY
  2. Mark the balancer unit and shafts on the top for reference that the balancer unit is at TDC.
    GFD277463Courtesy of FORD MOTOR COMPANY
  3. NOTE: Due to the precision interior construction of the balancer unit, it should not be disassembled.

    Remove the bolts and the balance unit.

    GFD277464Courtesy of FORD MOTOR COMPANY
  4. Remove the adjustment shims from the seat faces of the balancer unit.
  5. NOTE: Visually inspect the balancer unit gear for damage and verify that the shaft turns smoothly. If there is any damage or malfunction, replace the balancer unit.

    Install the master adjustment shims (No. 50) on the seat faces of the balancer unit.

  6. With the balancer unit shaft marks at the TDC position, slowly install the balancer unit to the cylinder block to avoid interference between the crankshaft drive gear and the balancer unit driven gear.
    GFD277465Courtesy of FORD MOTOR COMPANY
  7. Install the bolts and tighten.

    Torque: Stage 1: 18 lb.ft (25 Nm) Stage 2: 31 lb.ft (42 Nm)

    GFD277466Courtesy of FORD MOTOR COMPANY
  8. Remove the special tool and rotate the crankshaft to confirm that there are no meshing problems between the balancer unit gear and the crankshaft gear. Use Special Service Tool: 303-507 Timing Peg, Crankshaft TDC.
    GFD277467Courtesy of FORD MOTOR COMPANY
  9. Install the special tool and rotate the crankshaft slowly clockwise until the crankshaft balance weight is up against the Crankshaft TDC Timing Peg. The engine is now at TDC. Use Special Service Tool: 303-507 Timing Peg, Crankshaft TDC.
    GFD277462Courtesy of FORD MOTOR COMPANY
  10. Remove Special Service Tool: 303-507 Timing Peg, Crankshaft TDC.
    GFD277467Courtesy of FORD MOTOR COMPANY
  11. NOTE: Measure the backlash and verify that it is within specified range at all of the following 6 positions: 10 degrees, 30 degrees, 100 degrees, 190 degrees, 210 degrees and 280 degrees. It will be necessary to reset the measuring equipment between measurements.
    NOTE: The measurement must be taken with the Dial Indicator Gauge with Holding Fixture, a 5-mm Allen wrench and worm clamp set up as shown. Mark the Allen wrench with a file 80 mm (3.149 in) above the driven gear shaft center. Make sure the worm clamp and Allen wrench are not touching the balance shaft housing.
    NOTE: For an accurate measurement while measuring the gear backlash, insert a screwdriver as shown into the crankshaft No. 1 crankweight area and set both the rotation and the thrust direction with the screwdriver, using a prying action as shown.

    • Position as shown. Measure the gear backlash. Use Special Service Tool: 100-002 (TOOL-4201-C) Holding Fixture with Dial Indicator Gauge.

    • Position the Dial Indicator Gauge with Holding Fixture (1) on the Allen wrench 80 mm (3.149 in) above the driven gear shaft center (2) on the balancer unit.

    • Rotate the crankshaft clockwise and measure the backlash at all of the following 6 positions: 10 degrees, 30 degrees, 100 degrees, 190 degrees, 210 degrees and 280 degrees.

    GFD277468Courtesy of FORD MOTOR COMPANY
  12. Using the backlash measurement, select the proper shims from the Adjustment Shim Selection Table.

    1. Backlash
    2. Selection shim (No.)
    3. Shim thickness

    GFD277469Courtesy of FORD MOTOR COMPANY
    • Remove the balancer unit from the cylinder block.

    • Install the selected adjustment shims on the seat faces of the balancer unit.

  14. Install the special tool and rotate the crankshaft slowly clockwise until the crankshaft balance weight is up against the Crankshaft TDC Timing Peg. The engine is now at TDC. Use Special Service Tool: 303-507 Timing Peg, Crankshaft TDC.
    GFD277462Courtesy of FORD MOTOR COMPANY
  15. With the balancer unit shaft marks at the TDC position, slowly install the balancer unit to the cylinder block to avoid interference between the crankshaft drive gear and the balancer unit driven gear.
    GFD277465Courtesy of FORD MOTOR COMPANY
  16. Install the bolts and tighten.

    Torque: Stage 1: 18 lb.ft (25 Nm) Stage 2: 31 lb.ft (42 Nm)

    GFD277466Courtesy of FORD MOTOR COMPANY
  17. Remove Special Service Tool: 303-507 Timing Peg, Crankshaft TDC.
    GFD277467Courtesy of FORD MOTOR COMPANY
  18. NOTE: Measure the backlash and verify that it is within specified range at all of the following 6 positions: 10 degrees, 30 degrees, 100 degrees, 190 degrees, 210 degrees and 280 degrees. It will be necessary to reset the measuring equipment between measurements.
    NOTE: The measurement must be taken with the Dial Indicator Gauge with Holding Fixture, a 5-mm Allen wrench and worm clamp set up as shown. Mark the Allen wrench with a file 80 mm (3.149 in) above the driven gear shaft center. Make sure the worm clamp and Allen wrench are not touching the balance shaft housing.
    NOTE: For an accurate measurement while measuring the gear backlash, insert a screwdriver as shown into the crankshaft No. 1 crankweight area and set both the rotation and the thrust direction with the screwdriver, using a prying action as shown.

    • Position as shown. Measure the gear backlash. Use Special Service Tool: 100-002 (TOOL-4201-C) Holding Fixture with Dial Indicator Gauge.

    • Position the Dial Indicator Gauge with Holding Fixture (1) on the Allen wrench 80 mm (3.149 in) above the driven gear shaft center (2) on the balancer unit.

    • Rotate the crankshaft clockwise and measure the backlash at all of the following 6 positions: 10 degrees, 30 degrees, 100 degrees, 190 degrees, 210 degrees and 280 degrees.

    • If the backlash exceeds the specified range of 0.040 to 0.140 mm (0.00157 to 0.0055 in), install a new balancer unit and repeat the procedure.

GFD277468Courtesy of FORD MOTOR COMPANY
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