Balancer Shaft, Balancer Bearing Inspection

Balancer Shaft, Balancer Bearing Inspection

Balancer Shaft Removal and Installation

Balancer Shaft Thrust Play

1) Install balancer shafts, balancer bearings and balancer shaft cover to oil pump housing. Balancer Shaft Removal and Installation
2) Using dial gauge, measure thrust play (axial direction) as shown in figure.

If measured thrust play is out of specification, replace oil pump assembly.

Balancer shaft thrust play
Standard: 0.150 - 0.290 mm (0.0059 - 0.0114 in.)





Journal Out-of-Round and Taper

Using micrometer, measure balancer shaft journal diameter in the directions and at the points shown in figure, and calculate journal out-of-round and taper from measurements.

If measured values exceed their limits, replace corresponding balancer shaft with new one.

Journal outside diameter
Standard: 24.940 - 24.955 mm (0.98189 - 0.98248 in.)

Journal out-of-round ([1] - [2])
Limit: 0.01 mm (0.0004 in.)

Journal taper ([3] - [4])
Limit: 0.01 mm (0.0004 in.)





Balancer Shaft Bearing Clearance

1) Clean balancer shaft bearings, balancer shaft journals and bearing sections of both balancer shaft cover and oil pump housing.
2) Install balancer shaft bearings and balancer shafts to oil pump housing referring to steps 1) and 2) in "Installation" under Balancer Shaft Removal and Installation
3) Place a piece of gauging plastic (1) on the full width of each balancer shaft journal as shown in figure.





4) Install balancer shaft cover to oil pump housing.

Tightening torque
Balancer shaft cover bolt 29 Nm (3.0 kgf-m, 21.5 lbf-ft)

5) Remove balancer shaft cover and measure each gauging plastic (1) width at its widest point using scale (2) on gauging plastic envelope.

Balancer shaft bearing clearance
Standard: 0.030 - 0.072 mm (0.0012 - 0.0028 in.)





6) If measured value is out of specification replace balancer shaft bearings with new ones.
7) Recheck balancer shaft clearance. If measured value with new bearings is out of specification, replace balancer shaft.

Balancer Shaft Bearing Inspection

Check bearings for pitting, scratches, excessive wear or damage. If any defective condition is found, replace balancer shaft bearings.