Chery Tiggo. Manual — part 21
8. Installation is in the reverse order of removal.
Inspection
NOTE :
All measurements should be taken with the engine block at room temperature, 21°C.
Engine Block
• Clean cylinder block thoroughly and check all core hole plugs for evidence of leaking.
• Examine block and cylinder bores for cracks or fractures.
• Check block deck surfaces for flatness. Deck surface must be within service limit of 0.050 mm.
Cylinder Bore
• The cylinder walls should be checked for out-of-round and taper with cylinder indicator or equivalent. If the cyl-
inder walls are badly scuffed or scored, the cylinder block should be replaced, and new pistons and rings fitted.
• Measure the cylinder bore at three levels in directions X and Y. Top measurement should be 10 mm down and
bottom measurement should be 10 mm up from
bottom of bore.
CYLINDER BORE
All Cylinders
81.000 - 81.010 mm
Assembly
NOTE :
Cleanliness is extremely important during the engine assembly procedure. Any foreign material, including any mate-
rial created while cleaning gasket surfaces, that enters the oil passages, coolant passages or the oil pan can cause
engine failure.
NOTE :
Assemble all components in their original position.
1. Install the pistons to the connecting rods.
2. Using a piston ring expander, install the piston rings.
3. Assemble all components in the reverse order of disassembly.
ENGINE UNIT REPAIR
BESM020063
Pistons
Specifications
Clearance Specifications - Pistons
DESCRIPTION
SPECIFICATION (mm)
Surface Distortion Limit
0.15
Inner Diameter Standard
81
Out-Of-Round
< 0.008
Taper
< 0.01
Clearance Specifications - Piston Ring Groove
DESCRIPTION
SPECIFICATION (mm)
First Ring
0.04 - 0.08
Second Ring
0.01 - 0.0251
Clearance Specifications - Piston Ring End Gap
DESCRIPTION
SPECIFICATION
LIMIT
First Ring End Gap
0.2 - 0.4 mm
0.8 mm
Second Ring End Gap
0.4 - 0.6 mm
1.0 mm
Clearance Specifications - Piston to Piston Pin
DESCRIPTION
SPECIFICATION (mm)
Piston To Piston Pin
0.002 - 0.013
ENGINE UNIT REPAIR
02
Disassembly
• Piston Ring Removal
− Using a suitable ring expander, remove upper
and intermediate piston rings.
− Remove the upper oil ring side rail, lower oil
ring side rail and then oil ring expander from
piston.
− Clean ring grooves of any carbon deposits.
CAUTION:
Before removing the piston rings (1), check the
piston ring side clearance. Be careful to mark
the location of the piston rings if they are to
be reused.
• Piston Pin Snap Ring Removal
− Using snap ring pliers, remove the snap ring
(1).
− Heat the pistons if necessary.
ENGINE UNIT REPAIR
BESM020047
BESM020046
BESM020048
• Piston Pin Removal
− Push out the piston pin with a suitable tool.
• Connecting Rod & Piston Disassembly
− Remove the piston from the connecting rod.
Inspection
Check the piston diameter.
PISTON DIAMETER
All Pistons
80.946 - 80.964 mm
ENGINE UNIT REPAIR
BESM020049
BESM020041
BESM020050
02
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