Chery Tiggo. Manual — part 44
2. Remove the valve keeper (1), valve spring retainer
(2) and valve spring (3).
3. Remove valves (4) from the cylinder head.
Inspection
Inspect the valves for the following:
• Clean all valves thoroughly and discard burned,
warped and cracked valves.
• Check valve seats and valve faces for damage.
• When reconditioning valves follow the specifications
outlined for both intake and exhaust valves.
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ITEM
SPECIFICATION (mm)
Valve Outer Diameter
Intake Valve
5.98 ± 0.008
Exhaust Valve
5.96 ± 0.008
Valve Guide Inner Diameter
Intake Valve
5.4 ± 0.1
Exhaust Valve
5.4 ± 0.1
Fringe Thickness On Top Of Valve
Intake Valve
0.3 ± 0.15
Exhaust Valve
0.3 ± 0.15
Valve Tilt Angle
Intake Valve
65°
Exhaust Valve
68°
Valve Height
Intake Valve
107.998
Exhaust Valve
106.318
• Measure valve deflection.
VALVE DEFLECTION LIMIT (DIAL GAUGE READING)
Intake
0.02 mm
Exhaust
0.04 mm
• If it exceeds the limit, check valve to valve guide clearance.
− Measure valve stem diameter and valve guide inner diameter.
− Check that clearance is within specification.
− If it exceeds the limit, replace valve or valve
guide.
VALVE TO VALVE GUIDE CLEARANCE STANDARD
Intake
0.012 - 0.043 mm
Exhaust
0.032 - 0.063 mm
Assembly
1. Install the valves into the cylinder head (larger diameter on intake side).
2. Install the valve springs.
3. Install the valve spring retainers.
CYLINDER HEAD UNIT REPAIR
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4. Using valve spring compressor CH-20018 (1), com-
press the valve springs.
5. Install the valve keepers.
6. Strike the valve stem lightly with a plastic hammer after installation to verify proper assembly.
Valve Springs
Specifications
Valve Spring Specifications
DESCRIPTION
SPECIFICATION (mm)
Spring Free Length
47.7
Spring Height At 620 Newtons Of Pressure
32.0
Disassembly
NOTE :
The following special tools are required to perform the repair procedure:
• CH-20011 - Valve Seal Installer
• CH-20012 - Valve Stem Seal Installer Guide
• CH-20013 - Valve Seal Remover
• CH-20017 - Valve Keeper Installer
• CH-20018 - Valve Spring Compressor
1. Using the special tool CH-20018 (1), compress the
valve springs.
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2. Remove the valve keeper (1), valve spring retainer
(2).
3. Remove the valve springs (3) from the cylinder
head.
Inspection
Inspect the valve springs for the following:
• Whenever valves have been removed for inspec-
tion, reconditioning or replacement, valve springs
should be tested for correct load.
• Discard the springs that do not meet specifications.
• The following specifications apply to both intake
and exhaust valve springs.
VALVE SPRING LENGTH/HEIGHT
Spring Free Length
47.7 mm
Spring Height At 620 Newtons Of Pressure
32.0 mm
If it is not within specifications, replace the valve spring.
CYLINDER HEAD UNIT REPAIR
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