Balancer Shaft Removal and Installation

Balancer Shaft Removal and Installation

Oil Pump Assembly Components

Removal

1) Remove oil pump assembly. Removal and Replacement
2) Remove balancer shaft cover (1) from oil pump assembly.





3) Remove oil pump sprocket according to the following procedure.
a) Insert special tool into aligning holes (1) in balancer shafts No.1 and No.2 to hold balancer shafts.
Special Tool

(A): 09914-67810

b) Remove oil pump sprocket (2).





4) Remove balancer shafts No.1 and No.2 according to the following procedure.
a) Align matchmark (1) on balancer gear No.1 with matchmark (2) on balancer gear No.2 as shown in figure.





b) Remove balancer shafts No.1 (1) and No.2 (2) from oil pump housing (3) by sliding them in direction of arrow.





5) Remove balancer shaft bearings if necessary.

Installation

Balancer Shaft, Balancer Bearing Inspection
1) If removed, install shaft balancer bearings according to the following procedure.

NOTE:
The balancer shaft bearing No.1 is different in shape from the balancer shaft bearing No.2. If these bearings are installed in the wrong (reverse) positions, the oil pump will have operational problems and/or the balancer shaft could seize up.

Be sure to install the bearings in the specified positions.

a) Fit tab (1) of each balancer shaft bearing to groove (2) of oil pump housing or balancer shaft cover.
b) Press balancer shaft bearing end (3) until its outer surface comes in contact with oil pump housing or balancer shaft cover.
c) Apply engine oil to inner surface (4) of balancer shaft bearing.

NOTE:
If oil is present between the bearing's outside surface and the oil pump housing / balancer shaft cover surface, the bearing could heat up to very high temperature, resulting in seizure.

Be sure to thoroughly wipe off any trace of oil that is present between the bearing's outside surface and the oil pump housing / balancer shaft cover surface.





2) Install balancer shafts No.1 and No.2 to oil pump housing according to the following procedure.
a) Align matchmark (1) on balancer gear No.1 with matchmark (2) on balancer gear No.2 as shown in figure.





b) Install balancer shafts No.1 (1) and No.2 (2) to oil pump housing (3) by sliding them in direction of arrow.

NOTE:
Fit end of balancer shaft No.2 in hole in inner rotor opening (4).





3) Install oil pump sprocket according to the following procedure.
a) Insert special tool into aligning holes (1) in balancer shafts No.1 and No.2 to hold balancer shafts.
Special Tool

(A): 09914-67810

b) Install oil pump sprocket (2).

NOTE:
The bolts may loosen during operation of the oil pump sprocket if you use any bolts other than the specified oil pump sprocket bolts (3).

Use only the specified bolts.

Tightening torque
Oil pump sprocket bolt (a): 45 Nm (4.6 kgf-m, 33.5 lbf-ft)





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) Install oil pump assembly. Removal and Replacement