Chery Tiggo. Manual — part 69
Disassembly
1. Remove the rocker shaft retaining bolt.
2. Remove the rocker arms.
3. Remove the camshaft thrust plate retaining bolts.
4. Remove the camshaft and then remove the camshaft seal.
1 - Rocker Shaft Retaining Bolt
2 - Intake Rocker Arm Shaft
3 - Rocker Arm
4 - Rocker Arm
5 - Rocker Shaft Spring
6 - Hydraulic Adjuster
7 - Rocker Arm and Rocker Shaft
8 - Exhaust Rocker Arm Shaft
9 - Rocker Arm
10 - Rocker Arm and Rocker Shaft
11 - Camshaft Oil Seal
12 - O-Ring
13 - Camshaft Thrust Plate
14 - Camshaft
CYLINDER HEAD UNIT REPAIR
LTSM020081
Camshaft
• Measure the camshaft cam lobe height.
• If wear is beyond the limit, replace the camshaft.
CAMSHAFT LOBE HEIGHT
DESCRIPTION
STANDARD LOBE HEIGHT
MINIMUM LOBE HEIGHT
Intake Cam Lobe Height
37.5 mm
37 mm
Exhaust Cam Lobe Height
36.99 mm
36.49 mm
Hydraulic Adjusters
CAUTION:
The hydraulic adjusters are a precision part. There should not be any dust or foreign matter on its
surface. Do not disassemble the hydraulic adjusters. It is required to use clean diesel oil to clean
the hydraulic adjusters.
• Soak the hydraulic adjusters in clean diesel oil.
• Using special tool MD-998442 (1) and MD-998441 (2), press the steel ball on the inside of the hydraulic
adjuster and remove all air by moving the plunger
up and down 4-5 times.
NOTE :
Use the special tool and check whether the plunger can
be pressed. If it is hard to press the plunger, the
hydraulic adjuster is normal. If it is easy to press the
plunger, repeat the previous procedure and then check
the hydraulic adjuster again. If the plunger is still loose,
the hydraulic adjuster should be replaced.
CAUTION:
After the hydraulic adjuster has been prepared, it should be kept erect to avoid the loss of diesel
oil.
CYLINDER HEAD UNIT REPAIR
BESM020037
LTSM020088
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• Using special tool MD-998440 (1) (return leakage tester), install the hydraulic adjuster.
• After the plunger has moved slightly (0.2 - 0.5
mm), measure the time it takes to move an addi-
tional 1.0 mm. If the measurement value is not
within specifications, replace the hydraulic adjuster-
.Standard Value: 4 - 20 seconds/1 mm (applying
diesel oil of 15-20°C)
Rocker Arms
• Inspect the surface of the roller (2) on all rocker
arms. If there is any damage, the rocker arm
should be replaced.
• Inspect the roller for smooth operation. If the roller
does not revolve smoothly or is loose, the rocker
arm should be replaced.
• Inspect the internal diameter (1) of the rocker arms.
If there is any damage, the rocker arm should be
replaced.
Valve & Valve Guides
Specifications
Valve & Valve Guide Specifications
DESCRIPTION
SPECIFICATION
LIMIT
Intake Valve Deflection
0.02 mm
0.02 mm
Exhaust Valve Deflection
0.04 mm
0.04 mm
Intake Valve Clearance
0.020 - 0.050 mm
0.10 mm
Exhaust Valve Clearance
0.030 - 0.070 mm
0.15 mm
Intake Valve Edge Thickness
1.0 mm
0.5 mm
Exhaust Valve Edge Thickness
1.2 mm
0.7 mm
Intake Valve Height
112.30 mm
111.80 mm
Exhaust Valve Height
114.11 mm
113.61 mm
Intake Valve Guide Height
49.30 mm
49.80 mm
Exhaust Valve Guide Height
49.30 mm
49.80 mm
CYLINDER HEAD UNIT REPAIR
LTSM020159
LTSM020037
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
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