Balancer Shaft Removal and Installation

Balancer Shaft Removal and Installation
Reference: Oil Pump Assembly Components

Removal
1) Remove oil pump assembly.
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
Reference: Balancer Shaft, Balancer Bearing Inspection

1) If removed, install shaft balancer bearings according to the following procedure.

CAUTION:
^ Balancer shaft bearing No.1 is different in shape from bearing No.2. Bearing No.1 is narrower in width than bearing No.2.
^ Do not apply engine oil to the following surfaces.
- Both contact surfaces (5) of balancer shaft bearing and oil pump housing.
- Both contact surfaces (5) of balancer shaft bearing and balancer shaft cover.

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.





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).

CAUTION:
Use new oil pump sprocket bolt (3) with pre-coated adhesive. Without this, bolts may loosen.

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





4) Install balancer shaft cover to oil pump housing.
Tightening torque
Balancer shaft cover bolt: 29 Nm (3.0 kg-m, 21.5 lbf-ft)
5) Install oil pump assembly.