Chery Tiggo. Manual — part 63
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 A and B. Top measurement should be 12 mm down and
bottom measurement should be 12 mm up from
bottom of bore.
CYLINDER BORE
Cylinder Size
86.50 - 86.53 mm
Cylinder Cylindrically
≤ 0.01 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
LTSM020126
Pistons
Specifications
Clearance Specifications - Pistons
DESCRIPTION
SPECIFICATION (mm)
Surface Distortion Limit
0.15
Out-Of-Round
< 0.008
Taper
< 0.01
Clearance Specifications - Piston Ring Groove
DESCRIPTION
SPECIFICATION
LIMIT
First Ring
0.02 - 0.06 mm
0.1 mm
Second Ring
0.02 - 0.06 mm
0.1 mm
Clearance Specifications - Piston Ring End Gap
DESCRIPTION
SPECIFICATION
LIMIT
First Ring
0.25 - 0.35 mm
0.8 mm
Second Ring
0.40 - 0.55 mm
0.8 mm
Oil Control Ring
0.10 - 0.40 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.
1 - No. 1 Compression Ring
2 - No. 2 Compression Ring
3 - Oil Control Ring
4 - Piston Pin
5 - Connecting Rod
6 - Connecting Rod Bolt
7 - Piston
8 - Piston and Connecting Rod Assembly
9 - Upper Connecting Rod Bearing
10 - Lower Connecting Rod Bearing
11 - Connecting Rod Cap
12 - Connecting Rod Nut
ENGINE UNIT REPAIR
LTSM020107
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 Removal
• Using special tool MD-998780 (1) & (2), remove the piston pin for the pistons.
• Insert the tool push rod into the piston from the
notched side.
• Attach the tool guide into the piston and to the
push rod.
Connecting Rod & Piston Disassembly
• Connecting Rod & Piston Disassembly.
− Remove the piston from the connecting rod.
ENGINE UNIT REPAIR
BESM020046
LTSM020180
BESM020041
02
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