Balance Shaft, Intake Side

Balance Shaft, Intake Side

Special tools, testers and auxiliary items required

• Puller (T10394)

• Puller (T10055)

• Always replace the balance shaft after removing it.

Removing

- Remove the toothed belt from the coolant pump. Refer to => [ Coolant Pump Toothed Belt ] Coolant Pump Toothed Belt.

- Remove the balance shaft timing chain. Refer to => [ Balance Shaft Timing Chain ] Balance Shaft Timing Chain.

- Remove the intermediate sprocket bolt - 1 - and sprocket.






- Remove the intake camshaft balance shaft bolt - 2 - and remove the balance shaft.






If the balance shaft cannot be removed by hand, use the puller (T10394).

- Install the half shell (T10394/1) from the puller (T10394) and turn it upward in the - direction of the arrow -.






- Install the puller (T10394) and push the sliding sleeve in the - direction of the arrow -.






- Install the puller (T10055) to the puller (T10394) and remove the balance shaft in the - direction of the arrow -.






Installing

• Because of the small clearance between the balance shaft and cylinder block, the balance shaft may need to be cooled in order to install it. Check if the balance shaft can be inserted into the cylinder block without forcing it in. If it cannot, the balance shaft must be cooled before installing it.

• Tightening specifications, refer to => [ Balance Shaft Timing Chain Overview ] Balance Shaft Timing Chain Overview.

- Place the new balance shaft in a freezer for 30 minutes or spray it with commercially available cooling spray.

- Lubricate the balance shaft bearings with engine oil.

- Install the new intake camshaft balance shaft and tighten the bolt - 2 -.






- Replace the O-ring - 1 - on the bearing pin and coat it with engine oil.






- Coat the alignment pin - arrow - with engine oil and install the bearing pin, the alignment pin must engage in the hole in the cylinder block.

Always replace the intermediate shaft sprocket. Otherwise the backlash will not adjust itself and it could result in engine damage. The new intermediate shaft sprocket has an anti-friction coating that wears off after a short period of use, which automatically adjusts the backlash.

- Mark the tooth face on the intermediate sprocket - arrows -.






- Install the intermediate sprocket, the mark on the balance shaft must be between the marks on the tooth faces.

- Tighten the sprocket bolt - 1 -, tightening sequence, refer to => [ Intermediate Sprocket Bolt Tightening Sequence ] Balance Shaft Timing Chain Overview.






- Check the marks - arrow - on the intermediate shaft sprocket/balance shaft.

• Due to the ratio, the marks align only every 7th turn.

- Install the balance shaft timing chain. Refer to => [ Installing ] Balance Shaft Timing Chain.

The rest of the installation is basically a reverse of the removal procedure, note the following:

- Replace the coolant pump drive seal. Refer to => [ Coolant Pump Driveshaft Seal ] Coolant Pump Driveshaft Seal.