Chery Tiggo. Manual — part 71
NOTE :
Before installing the valve seat, heat the cylinder head to the temperature of about 250°, or cool the valve seat in
liquid nitrogen in order to install the valve seat.
• Machine the new valve seat and valve to proper specifications.
Assembly
1. Install the valves into the cylinder head (larger diameter on intake side).
2. Using special tool MD-998774, install the new valve oil seal.
3. Install the valve springs.
4. Install the valve spring retainers.
5. Using valve spring compressor MD-998772 (1),
compress the valve springs.
6. Install the valve keepers.
7. Strike the valve stem lightly with a plastic hammer
after installation to verify proper assembly.
Valve Springs
Specifications
Valve Spring Specifications
DESCRIPTION
SPECIFICATION
LIMIT
Spring Free Length
51.0 mm
50.0 mm
Spring Center Line
≤ 2.0°
≤ 4.0°
CYLINDER HEAD UNIT REPAIR
LTSM020092
Disassembly
NOTE :
The following special tools are required to perform the repair procedure:
• MD-998772 - Valve Spring Compressor
1 - Cylinder Head Bolt
2 - Valve Spring Keepers
3 - Upper Valve Spring Retainer
4 - Valve Spring
5 - Valve Oil Seal
6 - Lower Valve Spring Retainer
7 - Valve Guide
8 - Valve Seat
9 - Valve
10 - Cylinder Head
CYLINDER HEAD UNIT REPAIR
LTSM020090
02
1. Using the special tool MD-998772 (1), compress
the valve springs.
2. Remove the valve keeper, valve spring retainer.
3. Remove the valve springs from the cylinder head.
Inspection
NOTE :
Whenever valves have been removed for inspection, reconditioning or replacement, valve springs should be tested
for correct load.
• Check the valve spring length/height. Discard the springs that do not meet specifications.
• The following specifications apply to both intake
and exhaust valve springs.
VALVE SPRING LENGTH/HEIGHT
DESCRIPTION
SPECIFICATION
LIMIT
Spring Free Length
51.0 mm
50.0 mm
CYLINDER HEAD UNIT REPAIR
LTSM020092
BESM020072
• Check the valve spring center line. Discard the springs that do not meet specifications.
• The following specifications apply to both intake
and exhaust valve springs.
VALVE SPRING CENTER LINE
DESCRIPTION
SPECIFICATION
LIMIT
Spring Center Line
≤ 2.0°
≤ 4.0°
Assembly
1. Install the valve springs (2).
2. Install the valve spring retainers (1).
3. Using valve spring compressor MD - 998772, com-
press the valve springs.
4. Install the valve keepers.
5. Strike the valve stem lightly with a plastic hammer
after installation to verify proper assembly.
CYLINDER HEAD UNIT REPAIR
LTSM020100
LTSM020039
02
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