Chery Tiggo. Manual — part 23
Crankshaft
Specifications
Torque Specifications
DESCRIPTION
TORQUE (N·m)
Main Bearing Cap Bolts
1st Step: Tighten the bolt to 45 N·m
2nd Step: Tighten the bolt an additional 180°
Lower Cylinder Block Bolts
23
Clearance Specifications
DESCRIPTION
SPECIFICATION (mm)
Diameter of Crankshaft Main Journals
53.981 - 54
Diameter of Crankshaft Rod Journals
47.884 - 47.9
Out-of-Round Maximum of Crankshaft Main Journals
0.008
Axial Clearance of Crankshaft
0.07 - 0.265
Radial Clearance of Crankshaft
0.0035 - 0.034
Coaxality Crankshaft Main Journal
0.05
Thrust Washer Thickness
2.4 - 2.405
Disassembly
1. Remove the front crankshaft oil seal (See Front Crankshaft Oil Seal Removal & Installation in Section 02
Engine).
2. Remove the rear crankshaft oil seal (See Rear Crankshaft Oil Seal Removal & Installation in Section 02 Engine).
3. Remove the pistons with connecting rod assemblies.
4. Remove the lower cylinder block bolts in the
sequence shown.
NOTE: Before loosening the lower cylinder block
bolts, measure the crankshaft side clearance.
5. Remove the lower cylinder block.
6. Remove the crankshaft.
7. Remove the main bearings and thrust bearings from the cylinder block and lower cylinder block.
NOTE: If reusing the bearings, identify and number the bearings so that they are assembled in the same position
and direction.
ENGINE UNIT REPAIR
BESM020074
Inspection
• The crankshaft main journals should be checked for
excessive wear, roundness and scoring. Limits of
roundness on any crankshaft main journals should
be held to 0.008 mm. Limits of roundness on any
crankshaft rod journals should be held to 0.005
mm. DO NOT nick crank pin or bearing fillets. Lim-
its of out of round on any crankshaft journals
should be held to 0.005 mm.
• Check the axial clearance after installation. Stan-
dard of axial clearance should be 0.07 mm. Limits
of axial clearance should be held to 0.265 mm.
• Clean the journal and bearing.
• Install the crankshaft.
• Cut the plastic-gauge to the same width as the
bearing, and then put it onto the crankshaft journal
to make it parallel with the central line of the crank-
shaft.
• Install the main bearing cap carefully, and tighten
the bolts to the specified torque.
• Remove the main bearing cap.
• Measure the oil clearance with the plastic-gauge.
− Standard oil clearance of crankshaft rod and
main journals should be 0.022 mm
− Limits of oil clearance of crankshaft rod and
main journals should be 0.058 mm
Standard oil clearance of crankshaft main journal
should be 0.022 mm. Limits of oil clearance of crank-
shaft main journal should be 0.058 mm.
ENGINE UNIT REPAIR
BESM020075
BESM020076
BESM020077
02
Assembly
1. Install the main bearings and thrust bearings to the upper cylinder block and lower cylinder block.
NOTE: Identify and number the bearings, if reusing them, so that they are assembled in the same position and
direction.
2. Assemble the crankshaft and main bearings in the reverse order of disassembly.
ENGINE UNIT REPAIR
CYLINDER HEAD UNIT REPAIR
Cylinder Head
Specifications
Torque Specifications
DESCRIPTION
TORQUE (N·m)
Cylinder Head Bolts
1st Step: Tighten the bolt to 40 ± 5 N·m
2nd Step: Tighten the bolt an additional 90 ± 5°
3rd Step: Tighten the bolt an additional 90 ± 5°
Cylinder Head Cover Bolts
11
Clearance Specifications
DESCRIPTION
SPECIFICATION (mm)
Cylinder Head Flatness
0.04
Intake Valve Deflection
0.02
Exhaust Valve Deflection
0.04
Spring Height
47.7
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
NOTE :
Replacement cylinder head comes complete with valves, seals, springs, retainers, keepers, tappets, and camshafts.
1. Remove camshafts.
2. Remove the hydraulic tappet assembly (1).
BESM020071
02
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