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Valve

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

Parts

PartIntake
ManufacturerCHY
OEM part #53020747AB
Price$21.35
PartExhaust
ManufacturerCHY
OEM part #53021916AB
Price$25.95

Labor

Resurface/Grind — All Cylinders13.0 hr
Warranty 0.0 hrSkill A
To Knurl Valve Guide, Add — One0.1 hr
Warranty 0.0 hrSkill A
To Renew Valve Guide, Add — One0.2 hr
Warranty 0.0 hrSkill A
To Ream Guide, Add0.1 hr
Warranty 0.0 hrSkill A
To Renew Camshaft, Add — One0.2 hr
Warranty 0.0 hrSkill A
Each Additional0.1 hr
Warranty 0.0 hrSkill A
Procedures
Procedures — Valve And Valve Seat Refacing - Left Cylinder Head5 steps
ℹ NOTE
Valve seats that are worn or burned can be reworked, provided that correct angle and seat width are maintained. Otherwise the cylinder head must be replaced.
ℹ NOTE
When refacing valves (4) and valve seats, it is important that the correct size valve guide pilot be used for reseating stones. A true and complete surface must be obtained.
Fig. 1
Fig. 1
Fig. 2
Fig. 2
  1. Using a suitable dial indicator measure the center of the valve seat. Total run out must not exceed 0.051 mm (0.002 in).
  2. Apply a small amount of Prussian blue to the valve seat, insert the valve into the cylinder head, while applying light pressure on the valve rotate the valve. Remove the valve and examine the valve face. If the blue is transferred below the top edge of the valve face, lower the valve seat using a 15 degree stone. If the blue is transferred to the bottom edge of the valve face, raise the valve seat using a 65 degree stone.
  3. When the seat is properly positioned the width of the intake seat must be 1.75 - 2.36 mm (0.0689 - 0.0928 in.) and the exhaust seat must be 1.71 - 2.32 mm (0.0673 - 0.0911 in.).
  4. Check the valve spring (6) installed height after refacing the valve and seat. The installed height for both intake and exhaust valve springs must not exceed 40.74 mm (1.6039 in.)
  5. The valve seat and valve face must maintain a face angle of 44.5 - 45 ° angle.
Procedures — Valve And Valve Seat Refacing - Right Cylinder Head5 steps
ℹ NOTE
Valve seats that are worn or burned can be reworked, provided that correct angle and seat width are maintained. Otherwise the cylinder head must be replaced.
ℹ NOTE
When refacing valves (4) and valve seats, it is important that the correct size valve guide pilot be used for reseating stones. A true and complete surface must be obtained.
Fig. 1
Fig. 1
Fig. 2
Fig. 2
  1. Using a suitable dial indicator measure the center of the valve seat. Total run out must not exceed 0.051 mm (0.002 in).
  2. Apply a small amount of Prussian blue to the valve seat, insert the valve into the cylinder head, while applying light pressure on the valve rotate the valve. Remove the valve and examine the valve face. If the blue is transferred below the top edge of the valve face, lower the valve seat using a 15 degree stone. If the blue is transferred to the bottom edge of the valve face, raise the valve seat using a 65 degree stone.
  3. When the seat is properly positioned the width of the intake seat must be 1.75 - 2.36 mm (0.0689 - 0.0928 in.) and the exhaust seat must be 1.71 - 2.32 mm (0.0673 - 0.0911 in.).
  4. Check the valve spring (6) installed height after refacing the valve and seat. The installed height for both intake and exhaust valve springs must not exceed 40.74 mm (1.6039 in.)
  5. The valve seat and valve face must maintain a face angle of 44.5 - 45 ° angle.
Intake And Exhaust Valves - Installation — Left Cylinder Head8 steps
Fig. 1
Fig. 1
Fig. 2
Fig. 2
Fig. 3
Fig. 3
  1. coat the valve stem with clean engine oil and insert it into the cylinder head.
  2. Install the valve stem seal. make sure the seal is fully seated and that the garter spring at the top of the seal is intact.
  3. Install the spring and the spring retainer.
  4. Using the valve spring compressor, compress the spring and install the two valve spring retainer halves.
  5. Release the valve spring compressor and make sure the two spring retainer halves and the spring retainer are fully seated(Figure 1).
  6. Lubricate the camshaft journal with clean engine oil then Position the camshaft (with the sprocket dowel on the left camshaft at 11 o'clock and the right camshaft at 12 o'clock), then position the camshaft bearing caps.
  7. Install the camshaft bearing cap retaining bolts. Tighten the bolts 9-13 Nm (100 in. lbs.) in 1/2 turn increments in the sequence shown(Figure 2).
  8. Position the hydraulic lash adjusters and rocker armsValve Rocker Arm - Installation.
Intake And Exhaust Valves - Installation — Right Cylinder Head8 steps
Fig. 1
Fig. 1
Fig. 2
Fig. 2
Fig. 3
Fig. 3
  1. coat the valve stem with clean engine oil and insert it into the cylinder head.
  2. Install the valve stem seal. make sure the seal is fully seated and that the garter spring at the top of the seal is intact.
  3. Install the spring and the spring retainer.
  4. Using the valve spring compressor, compress the spring and install the two valve spring retainer halves.
  5. Release the valve spring compressor and make sure the two spring retainer halves and the spring retainer are fully seated(Figure 1).
  6. Lubricate the camshaft journal with clean engine oil then Position the camshaft (with the sprocket dowel on the left camshaft at 11 o'clock and the right camshaft at 12 o'clock), then position the camshaft bearing caps.
  7. Install the camshaft bearing cap retaining bolts. Tighten the bolts 9-13 Nm (100 in. lbs.) in 1/2 turn increments in the sequence shown(Figure 2).
  8. Position the hydraulic lash adjusters and rocker armsValve Rocker Arm - Installation.
Intake And Exhaust Valves - Removal — Left Cylinder Head11 steps
ℹ NOTE
The cylinder head(s) must be removed in order to perform this procedure.
ℹ NOTE
All valve springs and valves are removed in the same manner; this procedure only covers one valve and valve spring.
ℹ NOTE
It may be necessary to tap the top of the valve spring to loosen the spring retainers locks enough to be removed.
ℹ NOTE
The valve spring is under tension, use care when releasing the valve spring compressor.
ℹ NOTE
Check for sharp edges on the keeper grooves. Remove any burrs from the valve stem before removing the valve from the cylinder head.
ℹ NOTE
The valve stem seals are common between intake and exhaust.
ℹ NOTE
Whenever the valves are removed from the cylinder head it is recommended that the valve springs be inspected and tested for reuse.
Fig. 1
Fig. 1
Fig. 2
Fig. 2
Fig. 3
Fig. 3
  1. Remove and isolate the negative battery cable.
  2. Remove the cylinder head covers Cylinder Head Cover(s) - Removal
  3. Remove the rocker arms and lash adjusters Valve Rocker Arm - Removal
  4. Remove the camshaft bearing caps and the camshaft Camshaft - Removal
  5. Remove the cylinder head(s) Cylinder Head - Removal
  6. Using Valve Spring Compressor and Adapter , compress the valve spring.
  7. Remove the two spring retainer lock halves.
  8. Remove the valve spring compressor.
  9. Remove the spring retainer, and the spring.
  10. Remove the valve from the cylinder head.
  11. Remove the valve stem seal. Mark the valve for proper installation. TESTING VALVE SPRINGS Inspect the valve springs for physical signs of wear or damage. Using a suitable valve spring tester (1), test the following; -Specified Spring Height -Specified Spring Force (Valve Open) -Specified Spring Force (Valve Closed) Replace any springs that do not meet specifications Engine Specifications
Intake And Exhaust Valves - Removal — Right Cylinder Head11 steps
ℹ NOTE
The cylinder head(s) must be removed in order to perform this procedure.
ℹ NOTE
All valve springs and valves are removed in the same manner; this procedure only covers one valve and valve spring.
ℹ NOTE
It may be necessary to tap the top of the valve spring to loosen the spring retainers locks enough to be removed.
ℹ NOTE
The valve spring is under tension, use care when releasing the valve spring compressor.
ℹ NOTE
Check for sharp edges on the keeper grooves. Remove any burrs from the valve stem before removing the valve from the cylinder head.
ℹ NOTE
The valve stem seals are common between intake and exhaust.
ℹ NOTE
Whenever the valves are removed from the cylinder head it is recommended that the valve springs be inspected and tested for reuse.
Fig. 1
Fig. 1
Fig. 2
Fig. 2
Fig. 3
Fig. 3
  1. Remove and isolate the negative battery cable.
  2. Remove the cylinder head covers Cylinder Head Cover(s) - Removal
  3. Remove the rocker arms and lash adjusters Valve Rocker Arm - Removal
  4. Remove the camshaft bearing caps and the camshaft Camshaft - Removal
  5. Remove the cylinder head(s) Cylinder Head - Removal
  6. Using Valve Spring Compressor and Adapter , compress the valve spring.
  7. Remove the two spring retainer lock halves.
  8. Remove the valve spring compressor.
  9. Remove the spring retainer, and the spring.
  10. Remove the valve from the cylinder head.
  11. Remove the valve stem seal. Mark the valve for proper installation. TESTING VALVE SPRINGS Inspect the valve springs for physical signs of wear or damage. Using a suitable valve spring tester (1), test the following; -Specified Spring Height -Specified Spring Force (Valve Open) -Specified Spring Force (Valve Closed) Replace any springs that do not meet specifications Engine Specifications
Factory service manual
From the 2008 KK factory manual — descriptions, specs, torque & procedures for this part.
VALVE GUIDES
The valve guides are made of powered metal and are pressed into the cylinder head. The guides are not replaceable or serviceable, and valve guide reaming is not recommended. If the guides are worn beyond acceptable limits, replace the cylinder heads.
VALVES
The valves are made of heat resistant steel and have chrome plated stems to prevent scuffing. Each valve is actuated by a roller rocker arm which pivots on a stationary lash adjuster. All valves use three bead lock keepers to retain the springs and promote valve rotation.
REFACING📷 1
1 - VALVE LOCKS (3-BEAD) 2 - RETAINER 3 - VALVE STEM OIL SEAL 4 - INTAKE VALVE 5 - EXHAUST VALVE
6 - VALVE SPRING
NOTE: Valve seats that are worn or burned can be reworked, provided that correct angle and seat width are maintained. Otherwise the cylinder head must be replaced.
NOTE: When refacing valves (4) and valve seats, it is important that the correct size valve guide pilot be used for reseating stones. A true and complete surface must be obtained.
1. Using a suitable dial indicator measure the center of the valve seat. Total run out must not exceed 0.051 mm (0.002 in). 2. Apply a small amount of Prussian blue to the valve seat, insert the valve into the cylinder head, while applying light pressure on the valve rotate the valve. Remove the valve and examine the valve face. If the blue is transferred below the top edge of the valve face, lower the valve seat using a 15 degree stone. If the blue is transferred to the bottom edge of the valve face, raise the valve seat using a 65 degree stone. 3. When the seat is properly positioned the width of the intake seat must be 1.75 - 2.36 mm (0.0689 - 0.0928 in.) and the exhaust seat must be 1.71 - 2.32 mm (0.0673 - 0.0911 in.). 4. Check the valve spring (6) installed height after refacing the valve and seat. The installed height for both intake and exhaust valve springs must not exceed 40.74 mm (1.6039 in.) 5. The valve seat and valve face must maintain a face angle of 44.5 - 45° angle.
figure
VALVE GUIDE SEAL
The valve guide seals are made of rubber and incorporate an integral steel valve spring seat. The integral garter spring maintains consistent lubrication control to the valve stems.
SPRINGS-VALVE
VALVE GUIDES
The valve guides are made of powered metal and are pressed into the cylinder head. The guides are not replaceable or serviceable, and valve guide reaming is not recommended. If the guides are worn beyond acceptable limits, replace the cylinder heads.
VALVES
The valves are made of heat resistant steel and have chrome plated stems to prevent scuffing. Each valve is actuated by a roller rocker arm which pivots on a stationary lash adjuster. All valves use three bead lock keepers to retain the springs and promote valve rotation.
VALVES
The valves are made of heat resistant steel and have chrome plated stems to prevent scuffing. Each valve is actuated by a roller rocker arm which pivots on a stationary lash adjuster. All valves use three bead lock keepers to retain the springs and promote valve rotation.
REFACING📷 1
1 - VALVE LOCKS (3-BEAD) 2 - RETAINER 3 - VALVE STEM OIL SEAL 4 - INTAKE VALVE 5 - EXHAUST VALVE
6 - VALVE SPRING
NOTE: Valve seats that are worn or burned can be reworked, provided that correct angle and seat width are maintained. Otherwise the cylinder head must be replaced.
NOTE: When refacing valves (4) and valve seats, it is important that the correct size valve guide pilot be used for reseating stones. A true and complete surface must be obtained.
1. Using a suitable dial indicator measure the center of the valve seat. Total run out must not exceed 0.051 mm (0.002 in). 2. Apply a small amount of Prussian blue to the valve seat, insert the valve into the cylinder head, while applying light pressure on the valve rotate the valve. Remove the valve and examine the valve face. If the blue is transferred below the top edge of the valve face, lower the valve seat using a 15 degree stone. If the blue is transferred to the bottom edge of the valve face, raise the valve seat using a 65 degree stone. 3. When the seat is properly positioned the width of the intake seat must be 1.75 - 2.36 mm (0.0689 - 0.0928 in.) and the exhaust seat must be 1.71 - 2.32 mm (0.0673 - 0.0911 in.). 4. Check the valve spring (6) installed height after refacing the valve and seat. The installed height for both intake and exhaust valve springs must not exceed 40.74 mm (1.6039 in.) 5. The valve seat and valve face must maintain a face angle of 44.5 - 45 ° angle.
figure
VALVE GUIDE SEALS
The valve guide seals are made of rubber and incorporate an integral steel valve spring seat. The integral garter spring maintains consistent lubrication control to the valve stems.
SPRINGS-VALVE