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Camshaft

Engine, Cooling and Exhaust › Engine
Unified entry — merged from multiple cross-listed pages in the original manual.

Parts

PartRight
ManufacturerCHY
OEM part #53021892AC
Price$325.00
PartLeft
ManufacturerCHY
OEM part #53021893AC
Price$170.00

Labor

Replace — Both Banks5.2 hr
Warranty 0.0 hrSkill B
Left Bank3.5 hr
Warranty 0.0 hrSkill B
Right Bank3.9 hr
Warranty 0.0 hrSkill B
Procedures
Camshaft - Installation — Right12 steps
ℹ NOTE
Position the right side camshaft so that the camshaft sprocket dowel is near the 10 o'clock position, This will place the camshaft at the neutral position easing the installation of the camshaft bearing caps.
ℹ NOTE
Caps should be installed so that the stamped numbers on the caps are in numerical order, (1 through 4) from the front to the rear of the engine. All caps should be installed so that the stamped arrows on the caps point toward the front of the engine.
△ CAUTION
Remove excess oil from the camshaft sprocket retaining bolt, failure to do so can cause bolt over-torque resulting in bolt failure.
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  1. Lubricate the camshaft journals with clean engine oil.
  2. Position the camshaft into the cylinder head.
  3. Install the camshaft bearing caps, hand tighten the retaining bolts.
  4. Using the sequence shown, in 1/2 turn increments, tighten the bearing cap retaining bolts.
  5. Using the sequence shown, tighten the camshaft bearing cap retaining bolts to 11 Nm (100 in. lbs.).
  6. Position the camshaft drive gear into the timing chain aligning the V6 mark (1) between the two marked chain links (Two links marked during removal).
  7. Using the Camshaft Holder (2), rotate the camshaft until the camshaft sprocket dowel is aligned with the slot in the camshaft sprocket and install the sprocket onto the camshaft.
  8. Remove excess oil from the camshaft sprocket bolt, install the camshaft sprocket retaining bolt and hand tighten.
  9. Remove the timing chain wedge special tool (1).
  10. Using the Spanner Wrench with adapter pins , tighten the camshaft sprocket retaining bolt to 122 Nm (90 ft. lbs.)
  11. Install the camshaft position sensor (3).
  12. Install the cylinder head cover Cylinder Head Cover(s) - Installation.
Camshaft - Installation — Left11 steps
ℹ NOTE
Position the left side camshaft so that the camshaft sprocket dowel is near the 1 o'clock position, This will place the camshaft at the neutral position easing the installation of the camshaft bearing caps.
ℹ NOTE
Caps should be installed so that the stamped numbers on the caps are in numerical order, (1 through 4) from the front to the rear of the engine. All caps should be installed so that the stamped arrows on the caps point toward the front of the engine.
△ CAUTION
Remove excess oil from the camshaft sprocket retaining bolt, failure to do so can cause bolt over-torque resulting in bolt failure.
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  1. Lubricate camshaft journals with clean engine oil.
  2. Position the camshaft into the cylinder head.
  3. Install the camshaft bearing caps, hand tighten the retaining bolts.
  4. Working in 1/2 turn increments, tighten the bearing cap retaining bolts in the sequence shown.
  5. Tighten the camshaft bearing cap retaining bolts to 11 Nm (100 in. lbs.)(Figure 1).
  6. Position the camshaft drive gear into the timing chain aligning the V6 mark between the two marked chain links (Two links marked during removal).
  7. Using the Camshaft Holder (2), rotate the camshaft until the camshaft sprocket dowel is aligned with the slot in the camshaft sprocket. Install the sprocket onto the camshaft.
  8. Remove excess oil from bolt, then install the camshaft sprocket retaining bolt and hand tighten.
  9. Remove Wedge Locking Tool.
  10. Using the Spanner Wrench (4) with adapter pins , tighten the camshaft sprocket retaining bolt to 122 Nm (90 ft. lbs.).
  11. Install the cylinder head coverCylinder Head Cover(s) - Installation.
Camshaft - Removal — Right10 steps
△ CAUTION
When the timing chain is removed and the cylinder heads are still installed, Do not forcefully rotate the camshafts or crankshaft independently of each other. Severe valve and/or piston damage can occur.
△ CAUTION
When removing the cam sprocket, timing chains or camshaft, Failure to use Wedge Locking Tool will result in hydraulic tensioner ratchet over extension, Requiring timing chain cover removal to re-set the tensioner ratchet.
△ CAUTION
Do not hold or pry on the camshaft target wheel for any reason, severe damage will occur to the target wheel resulting in a vehicle no start condition.
ℹ NOTE
The timing chain tensioners must be secured prior to removing the camshaft sprockets. Failure to secure tensioners will allow the tensioners to extend, requiring timing chain cover removal in order to reset tensioners.
△ CAUTION
Do not force Locking Wedge past the narrowest point between the chain strands. Damage to the tensioners may occur.
△ CAUTION
DO NOT STAMP OR STRIKE THE CAMSHAFT BEARING CAPS. SEVERE DAMAGE WILL OCCUR TO THE BEARING CAPS.
ℹ NOTE
When the camshaft is removed the rocker arms may slide downward, mark the rocker arms before removing camshaft.
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  1. Disconnect the negative battery cable.
  2. Remove the cylinder head cover Cylinder Head Cover(s) - Removal.
  3. Set engine cylinder #1 to TDC, camshaft sprocket V6 marks at the 12 o'clock position (1).
  4. Mark one link on the secondary timing chain on both sides of the V6 mark on the camshaft sprocket to aid in installation.
  5. Hold the camshaft with the Camshaft Holder (2), loosen but DO NOT remove the camshaft sprocket retaining bolt. Leave bolt snug against sprocket.
  6. Position the Wedge Locking Tool (1) between the timing chain strands. Tap the tool to securely wedge the timing chain against the tensioner arm and guide.
  7. Remove the camshaft position sensor (1).
  8. Hold the camshaft with the Camshaft Holder (2), while removing the camshaft sprocket bolt and sprocket.
  9. Using the sequence shown, loosen the camshaft bearing cap retaining bolts 1/2 turn at a time. Repeat until all load is off the bearing caps.
  10. Remove the camshaft bearing caps and the camshaft.
Camshaft - Removal — Left9 steps
△ CAUTION
When the timing chain is removed and the cylinder heads are still installed, Do not forcefully rotate the camshafts or crankshaft independently of each other. Severe valve and/or piston damage can occur.
△ CAUTION
When removing the cam sprocket, timing chains or camshaft, Failure to use the Wedge Locking Tool will result in hydraulic tensioner ratchet over extension, requiring timing chain cover removal to reset the tensioner ratchet.
△ CAUTION
Do not hold or pry on the camshaft target wheel (Located on the right side camshaft sprocket) for any reason, Severe damage will occur to the target wheel resulting in a vehicle no start condition.
ℹ NOTE
The timing chain tensioners must be secured prior to removing the camshaft sprockets. Failure to secure tensioners will allow the tensioners to extend, requiring timing chain cover removal in order to reset tensioners.
△ CAUTION
Do not force Locking Wedge past the narrowest point between the chain strands. Damage to the tensioners may occur.
△ CAUTION
DO NOT STAMP OR STRIKE THE CAMSHAFT BEARING CAPS. SEVERE DAMAGE WILL OCCUR TO THE BEARING CAPS.
ℹ NOTE
When the camshaft is removed the rocker arms may slide downward, mark the rocker arms before removing camshaft.
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  1. Remove cylinder head cover Cylinder Head Cover(s) - Removal.
  2. Set engine cylinder #1 to TDC, camshaft sprocket V6 marks at the 12 o'clock position.
  3. Mark one link on the secondary timing chain on both sides of the V6 mark on the camshaft sprocket to aid in installation.
  4. Loosen but DO NOT remove the camshaft sprocket retaining bolt. Leave the bolt snug against the sprocket.
  5. Position the Wedge Locking Tool (1) between the timing chain strands, tap the tool to securely wedge the timing chain against the tensioner arm and guide.
  6. Hold the camshaft with the Camshaft Holder , (Figure 2)while removing the camshaft sprocket bolt and sprocket.
  7. Using the Camshaft Holder , gently allow the camshaft to rotate 5° clockwise until the camshaft is in the neutral position (no valve load).
  8. Starting at the outside working inward, loosen the camshaft bearing cap retaining bolts 1/2 turn at a time. Repeat until all load is off the bearing caps.
  9. Remove the camshaft bearing caps and the camshaft.
Factory service manual
From the 2008 KK factory manual — descriptions, specs, torque & procedures for this part.
CAMSHAFT - LEFT
The camshafts consist of powdered metal steel lobes which are sinter-bonded to a steel tube. Four bearing journals are machined into the camshaft. Camshaft end play is controlled by two thrust walls that border the
nose piece journal.
CAMSHAFT - LEFT📷 2
CAUTION: When the timing chain is removed and the cylinder heads are still installed, DO NOT forcefully rotate the camshafts or crankshaft independently of each other. Severe valve and/or piston damage can occur.
CAUTION: When removing the cam sprocket, timing chains or camshaft, Failure to use the Wedge Locking Tool 8379 will result in hydraulic tensioner ratchet over extension, requiring timing chain cover removal to reset the tensioner ratchet.
1. Remove cylinder head cover. See REMOVAL.
1 - SPECIAL TOOL 8379 2 - CAMSHAFT SPROCKET 3 - CAMSHAFT SPROCKET BOLT 4 - CYLINDER HEAD
2. Set engine to TDC cylinder #1, camshaft sprocket V6 marks at the 12 o'clock position. 3. Mark one link on the secondary timing chain on both sides of the V6 mark on the camshaft sprocket to aid in installation.
CAUTION: Do not hold or pry on the camshaft target wheel (Located on the right side camshaft sprocket) for any reason, Severe damage will occur to the target wheel resulting in a vehicle no start condition.
4. Loosen but DO NOT remove the camshaft sprocket retaining bolt. Leave the bolt snug against the sprocket.
NOTE: The timing chain tensioners must be secured prior to removing the camshaft sprockets. Failure to secure tensioners will allow the tensioners to extend, requiring timing chain cover removal in order to reset tensioners.
CAUTION: Do not force wedge past the narrowest point between the chain strands. Damage to the tensioners may occur.
5. Position the Wedge Locking Tool 8379. See Fig. 56between the timing chain strands, tap the tool to securely wedge the timing chain against the tensioner arm and guide.
1 - Camshaft hole 2 - Special Tool 8428
6. Hold the camshaft with Camshaft Holder 8428 while removing the camshaft sprocket bolt and sprocket. See Fig. 57. 7. Using the Camshaft Holder 8428, gently allow the camshaft to rotate 5° clockwise until the camshaft is in the neutral position (no valve load). 8. Starting at the outside working inward, loosen the camshaft bearing cap retaining bolts 1/2 turn at a time. Repeat until all load is off the bearing caps.
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SEVERE DAMAGE WILL OCCUR TO THE BEARING CAPS.📷 1
NOTE: When the camshaft is removed the rocker arms may slide downward, mark the rocker arms before removing camshaft.
9. Remove the camshaft bearing caps and the camshaft.
figure
CAMSHAFT - LEFT📷 1
1. Lubricate camshaft journals with clean engine oil.
NOTE: Position the left side camshaft so that the camshaft sprocket dowel is near
the 1 o'clock position, This will place the camshaft at the neutral position easing the installation of the camshaft bearing caps.
2. Position the camshaft into the cylinder head. 3. Install the camshaft bearing caps, hand tighten the retaining bolts.
NOTE: Caps should be installed so that the stamped numbers on the caps are in numerical order, (1 through 4) from the front to the rear of the engine. All caps should be installed so that the stamped arrows on the caps point toward the front of the engine.
4. Working in 1/2 turn increments, tighten the bearing cap retaining bolts starting with the middle cap working outward. 5. Tighten the camshaft bearing cap retaining bolts to 11 N.m (100 in. lbs.). See Fig. 58. 6. Position the camshaft drive gear into the timing chain aligning the V6 mark between the two marked chain links (Two links marked during removal). 7. Using the Camshaft Holder 8428, rotate the camshaft until the camshaft sprocket dowel is aligned with the slot in the camshaft sprocket. Install the sprocket onto the camshaft.
CAUTION: Remove excess oil from camshaft sprocket bolt. Failure to do so can cause bolt over-torque resulting in bolt failure.
8. Remove excess oil from bolt, then install the camshaft sprocket retaining bolt and hand tighten. 9. Remove Wedge Locking Tool 8379. 10. Using the Spanner Wrench 6958 with adapter pins 8346, tighten the camshaft sprocket retaining bolt to 122 N.m (90 ft. lbs.). 11. Install the cylinder head cover. See INSTALLATION.
COVER-CYLINDER HEAD
figure
CAMSHAFT - RIGHT📷 1
The camshafts consist of powdered metal steel lobes which are sinter-bonded to a steel tube. Four bearing journals are machined into the camshaft. Camshaft end play is controlled by two thrust walls that border the nose piece journal.
figure
CAMSHAFT - RIGHT📷 4
CAUTION: When the timing chain is removed and the cylinder heads are still installed, DO NOT forcefully rotate the camshafts or crankshaft independently of each other. Severe valve and/or piston damage can
occur.
CAUTION: When removing the cam sprocket, timing chains or camshaft, Failure to use Wedge Locking Tool 8379 will result in hydraulic tensioner ratchet over extension, Requiring timing chain cover removal to reset the tensioner ratchet.
1. Remove the cylinder head cover. See REMOVAL. 2. Set engine to TDC cylinder No. 1, camshaft sprocket V6 marks at the 12 o'clock position (1). See Fig. 81. 3. Mark one link on the secondary timing chain on both sides of the V6 mark on the camshaft sprocket to aid in installation.
1 - Camshaft hole 2 - Special Tool 8428
CAUTION: Do not hold or pry on the camshaft target wheel for any reason, Severe damage will occur to the target wheel. A damaged target wheel could cause a vehicle no start condition.
4. Loosen but DO NOT remove the camshaft sprocket retaining bolt. See Fig. 83. Leave bolt snug against sprocket.
1 - SPECIAL TOOL 8379 2 - CAMSHAFT SPROCKET 3 - CAMSHAFT SPROCKET BOLT 4 - CYLINDER HEAD
NOTE: The timing chain tensioners must be secured prior to removing the camshaft sprockets. Failure to secure tensioners will allow the tensioners to extend, requiring timing chain cover removal in order to reset tensioners.
CAUTION: Do not force wedge past the narrowest point between the chain strands. Damage to the tensioners may occur.
5. Position the Wedge Locking Tool 8379 (1) between the timing chain strands. Tap the tool to securely wedge the timing chain against the tensioner arm and guide. See Fig. 83.
1 - Camshaft hole 2 - Special Tool 8428
6. Remove the camshaft position sensor. 7. Hold the camshaft with Camshaft Holder 8428 (2), while removing the camshaft sprocket bolt and sprocket. See Fig. 84.
8. Starting at the outside working inward, loosen the camshaft bearing cap retaining bolts 1/2 turn at a time. Repeat until all load is off the bearing caps. See Fig. 85.
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SEVERE DAMAGE WILL OCCUR TO THE BEARING CAPS.📷 1
NOTE: When the camshaft is removed the rocker arms may slide downward, mark the rocker arms before removing camshaft.
9. Remove the camshaft bearing caps and the camshaft.
figure
CAMSHAFT - RIGHT📷 4
1. Lubricate camshaft journals with clean engine oil.
NOTE: Position the right side camshaft so that the camshaft sprocket dowel is near the 10 o'clock position, This will place the camshaft at the neutral position easing the installation of the camshaft bearing caps.
2. Position the camshaft into the cylinder head. 3. Install the camshaft bearing caps, hand tighten the retaining bolts.
NOTE: Caps should be installed so that the stamped numbers on the caps are in numerical order, (1 through 4) from the front to the rear of the engine. All caps should be installed so that the stamped arrows on the caps point toward the front of the engine.
4. Working in 1/2 turn increments, tighten the bearing cap retaining bolts starting with the middle cap working outward. 5. Tighten the camshaft bearing cap retaining bolts to 11 N.m (100 in. lbs.). See Fig. 86.
6. Position the camshaft drive gear into the timing chain aligning the V6 mark between the two marked chain links (Two links marked during removal). See Fig. 87.
1 - Camshaft hole 2 - Special Tool 8428
7. Using the Camshaft Holder 8428 (2), rotate the camshaft until the camshaft sprocket dowel is aligned with the slot in the camshaft sprocket . Install the sprocket onto the camshaft. See Fig. 88.
CAUTION: Remove excess oil from camshaft sprocket bolt. Failure to do so can cause bolt over-torque resulting in bolt failure.
8. Remove excess oil from camshaft sprocket bolt, then install the camshaft sprocket retaining bolt and hand tighten.
1 - SPECIAL TOOL 8379 2 - CAMSHAFT SPROCKET 3 - CAMSHAFT SPROCKET BOLT 4 - CYLINDER HEAD
9. Remove timing chain wedge special tool 8379 (1). See Fig. 89. 10. Using Spanner Wrench 6958 with adapter pins 8346, tighten the camshaft sprocket retaining bolt to 122 N.m (90 ft. lbs.) 11. Install the camshaft position sensor. 12. Install the cylinder head cover. See INSTALLATION.
COVER-CYLINDER HEAD
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