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Balance Shaft

Engine, Cooling and Exhaust › Engine
Unified entry — merged from multiple cross-listed pages in the original manual.
Procedures
Balance Shaft Module - Removal2 steps
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  1. Remove the primary and secondary timing chains Timing Chain & Sprockets - Removal. Note: The balance shaft and gear are serviced as an assembly. Do not attempt to remove the gear from the balance shaft. Remove the retaining bolt (4) from the counterbalance shaft thrust plate (2).
  2. Using the Counterbalance Shaft Remover/Installer (1), remove the counterbalance shaft from the engine.
Balance Shaft Module - Installation6 steps
ℹ NOTE
The balance shaft and gear are serviced as an assembly. Do not attempt to remove the gear from the balance shaft.
ℹ NOTE
The balance shaft is heavy, and care should be used when installing shaft, so bearings are not damaged.
Fig. 1
Fig. 1
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Fig. 5
  1. Coat counterbalance shaft bearing journals with clean engine oil.
  2. Using the Counterbalance Shaft Remover/Installer (1), carefully install counterbalance shaft into engine(Figure 1).
  3. Install Counterbalance shaft thrust plate retaining bolt (4) finger tight.Do not tighten bolt at this time.
  4. Position the right side of the thrust plate with the right chain guide bolt, install bolt finger tight.
  5. Tighten the thrust plate retaining bolt (Figure 2) (4) to 28 Nm (250 in. lbs.)
  6. Remove the chain guide bolt so that guide can be installed.
Balance Shaft Module - Removal2 steps
Fig. 1
Fig. 1
Fig. 2
Fig. 2
Fig. 3
Fig. 3
  1. Remove the primary and secondary timing chains Timing Chain & Sprockets - Removal. Note: The balance shaft and gear are serviced as an assembly. Do not attempt to remove the gear from the balance shaft. Remove the retaining bolt (4) from the counterbalance shaft thrust plate (2).
  2. Using the Counterbalance Shaft Remover/Installer (1), remove the counterbalance shaft from the engine.
Balance Shaft Module - Installation6 steps
ℹ NOTE
The balance shaft and gear are serviced as an assembly. Do not attempt to remove the gear from the balance shaft.
ℹ NOTE
The balance shaft is heavy, and care should be used when installing shaft, so bearings are not damaged.
Fig. 1
Fig. 1
Fig. 2
Fig. 2
Fig. 3
Fig. 3
Fig. 4
Fig. 4
Fig. 5
Fig. 5
  1. Coat counterbalance shaft bearing journals with clean engine oil.
  2. Using the Counterbalance Shaft Remover/Installer (1), carefully install counterbalance shaft into engine(Figure 1).
  3. Install Counterbalance shaft thrust plate retaining bolt (4) finger tight.Do not tighten bolt at this time.
  4. Position the right side of the thrust plate with the right chain guide bolt, install bolt finger tight.
  5. Tighten the thrust plate retaining bolt (Figure 2) (4) to 28 Nm (250 in. lbs.)
  6. Remove the chain guide bolt so that guide can be installed.
Factory service manual
From the 2008 KK factory manual — descriptions, specs, torque & procedures for this part.
COUNTER BALANCE SHAFT TIMING📷 1
1 - COUNTERBALANCE SHAFT GEAR 2 - TIMING MARK 3 - IDLER SPROCKET GEAR
1. Ensure that the engine is at TDC with both camshaft sprocket V6 marks in the 12 o'clock position.
2. Look down the left cylinder head chain cavity. The timing dot (2) on the counter balance shaft drive gear should be in the 6 o'clock position. See Fig. 173.
figure
BALANCE SHAFT📷 2
1 - IDLER SHAFT 2 - COUNTERBALANCE SHAFT THRUST PLATE 3 - COUNTERBALANCE SHAFT DRIVE GEAR 4 - RETAINING BOLT
1. Remove the primary and secondary timing chains.
NOTE: The balance shaft and gear are serviced as an assembly. Do not attempt to remove the gear from the balance shaft.
Remove the retaining bolt (4) from the counterbalance shaft thrust plate (2). See Fig. 177.
1 - COUNTERBALANCE
INSTALLATION TOOL 2 - COUNTERBALANCE
figure
figure
SHAFT THRUST PLATE📷 1
2. Using the Counterbalance Shaft Remover/Installer tool 8641 (1), remove the counterbalance shaft from the engine. See Fig. 178.
figure
BALANCE SHAFT📷 1
1 - COUNTERBALANCE SHAFT REMOVAL AND INSTALLATION TOOL 2 - COUNTERBALANCE SHAFT THRUST PLATE
NOTE: The balance shaft and gear are serviced as an assembly. Do not attempt to remove the gear from the balance shaft.
1. Coat counterbalance shaft bearing journals with clean engine oil.
NOTE: The balance shaft is heavy, and care should be used when installing shaft, so bearings are not damaged.
2. Using the Counterbalance Shaft Remover/Installer 8641 (1), carefully install counterbalance shaft into engine. See Fig. 179.
1 - IDLER SHAFT 2 - COUNTERBALANCE
SHAFT THRUST PLATE 3 - COUNTERBALANCE
figure
SHAFT DRIVE GEAR📷 1
4 - RETAINING BOLT
3. Install Counterbalance shaft thrust plate retaining bolt (4) finger tight. Do not tighten bolt at this time.
4. Position the right side of the thrust plate with the right chain guide bolt, install bolt finger tight. 5. Tighten the thrust plate retaining bolt (4) to 28 N.m (250 in. lbs.) See Fig. 180. 6. Remove the chain guide bolt so that guide can be installed.
COVER-TIMING
figure