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.

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 (0.0003 in.)

Journal taper ([3] - [4])
Limit: 0.01 mm (0.0003 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 shafts to oil pump housing.
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 bearings and balancer shaft cover. Balancer Shaft Removal and Installation
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 clearance is out of standard, replace balancer shaft bearings with new ones and recheck balancer shaft bearing clearance.

If measured clearance with new bearings is still out of standard, replace corresponding balancer shaft

Balancer Shaft Bearing Inspection

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