Balancer Shaft/Balancer Shaft Holder Assembly Overhaul

Exploded View
Special Tools Required

Pin driver, 6.0 mm
 07744-0010500
Balancer Shaft/Balancer Shaft Holder Removal
  1. Turn the crankshaft pulley so its top dead center (TDC) mark (A) lines up with the pointer (B).
  1. Remove and discard the balancer chain tensioner.
  1. To hold the rear balancer shaft, insert a pin driver (A) into the maintenance hole in the lower balancer shaft holder and through the rear balancer shaft.
  1. Loosen the balancer shaft sprocket mounting bolt.
  1. Remove the chain guide mounting bolt (A) and the balancer shaft sprocket (B), then remove the balancer shaft/balancer shaft holder assembly (C).
Balancer Shaft Inspection
  1. Seat the balancer shaft by pushing it away from the balancer shaft sprocket end of the balancer shaft holder.
  1. Zero the dial indicator against the end of the balancer shaft, then push the balancer shaft back and forth and read the end play.
    Balancer Shaft End Play
    Front Balancer Shaft:
    Standard (New):
    0.05−0.10 mm (0.002−0.004 in.)
    Service Limit:
    0.135 mm (0.0053 in.)
    Rear Balancer Shaft:
    Standard (New):
    0.05−0.10 mm (0.002−0.004 in.)
    Service Limit:
    0.135 mm (0.0053 in.)

  1. Remove the baffle plates (A) and the upper balancer shaft holder (with bearings) (B), then remove the front balancer shaft (C) and the rear balancer shaft (D).
  1. Clean both balancer shaft journals, the balancer shaft holders, and the bearing halves with a clean shop towel.
  1. Place one strip of plastigage across each journal.
  1. Reinstall the bearings and the upper balancer shaft holder, then torque the bolts to the specified torque.
    NOTE: Do not rotate the balancer shafts during inspection.
    Specified Torque
    8 mm Bolts:
    27 N·m (2.8 kgf·m, 20 lbf·ft) Apply new engine oil to the bolt threads.
    6 mm Bolts:
    12 N·m (1.2 kgf·m, 8.8 lbf·ft)

  1. Remove the upper balancer shaft holder and the bearings again, and measure the widest part with the plastigage.
    • If the front balancer shaft No. 1 journal and the rear balancer shaft No. 1, 2 journals oil clearance is out-of-tolerance, replace the balancer shaft and recheck. If it is still out-of-tolerance, replace the balancer shaft holders.
    • If the front balancer shaft No. 2 journal and the rear balancer shaft No. 3 journal oil clearance is out-of-tolerance, install new bearings, and recheck. If it is still out-of-tolerance, replace the balancer shafts.
    Journal Oil Clearance
    Front No. 1 Journal:
    Standard (New):
    0.030−0.062 mm (0.0012−0.0024 in.)
    Service Limit:
    0.08 mm (0.003 in.)
    Front No. 2 Journal:
    Standard (New):
    0.04−0.10 mm (0.002−0.004 in.)
    Service Limit:
    0.13 mm (0.005 in.)
    Rear No. 1, 2 Journals:
    Standard (New):
    0.030−0.062 mm (0.0012−0.0024 in.)
    Service Limit:
    0.08 mm (0.003 in.)
    Rear No. 3 Journal:
    Standard (New):
    0.04−0.10 mm (0.002−0.004 in.)
    Service Limit:
    0.13 mm (0.005 in.)

  1. Align the punch mark on the rear balancer shaft in the center of the two punch marks on the front balancer shaft, then install the balancer shafts on the lower balancer shaft holder.
  1. Apply new engine oil to the threads of the 8 mm bolts (A).
  1. Install the upper balancer shaft holder (B) with new O-ring (C), then install the baffle plates (D).
Balancer Shaft/Balancer Shaft Holder Installation
  1. Make sure the No. 1 piston top dead center (TDC) mark (A) lines up with the pointer (B).
  1. Align the dowel pin (A) on the rear balancer shaft with the mark (B) on the balancer shaft holder.
  1. To hold the rear balancer shaft, insert a pin driver (A) into the maintenance hole in the lower balancer shaft holder and through the rear balancer shaft.
  1. Apply new engine oil to the threads of the balancer shaft sprocket mounting bolt (A).
  1. Loosely install the balancer shaft/balancer shaft holder assembly (B) with new O-rings (C), then install the balancer shaft sprocket (D).
  1. Remove the pin driver (E), then tighten the balancer shaft/balancer shaft holder assembly mounting bolts.
  1. Tighten the chain guide mounting bolt (F).
  1. Squeeze the new balancer chain tensioner (A), then install the set clip (B) on it as shown.
    NOTE: The set clip is supplied with the balancer chain tensioner.
  1. Install the new balancer chain tensioner.
  1. Remove the set clip from the balancer chain tensioner.