Chery Tiggo. Manual — part 64
Inspection
Cylinder Bore
• Check the inner diameter of each cylinder bore (See Cylinder Bore Inspection in Section 02 Engine).
CYLINDER BORE
All Cylinders
86.50 - 86.53 mm
Ring Groove Side Clearance
• Check piston ring to groove side clearance.
− Clean the ring slot using a suitable tool.
− Measure piston ring to groove side clearance.
RING GROOVE SIDE CLEARANCE
DESCRIPTION
SPECIFICATION
LIMIT
First Ring
0.02 - 0.06 mm
0.1 mm
Second Ring
0.02 - 0.06 mm
0.1 mm
ENGINE UNIT REPAIR
BESM020063
LTSM020121
Ring End Gap
• Wipe the cylinder bore clean. Insert ring and push down with piston to ensure it is square in the bore. The ring
gap measurement must be made with the ring posi-
tioned at least 13 mm from bottom of cylinder bore
and below the bottom of the oil ring travel where
the cylinder bore has minimal wear. Check gap with
feeler gauge.
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
Piston Pin Clearance
• Check the diameter of the piston pin bore.
• Check the outer diameter of the piston pin.
ENGINE UNIT REPAIR
BESM020052
BESM020053
02
• Check the inner diameter of connecting rod (small end).
PISTON PIN CLEARANCE
Piston and Piston Pin
0.002 - 0.013 mm
Assembly
Piston Pin Installation
• Measure the following dimensions of each piston
(1), piston pin (2) and connecting rod (3).
− Length of piston pin in hole (A).
− Width of pin sockets (B).
− Length of piston pin (C).
− Width of small end of connecting rod (D).
• Put measured sizes above into following formula to
calculate L.
− L=[(A-C)-(B-D)] / 2
• After inserting the push rod of the special tool into piston pin, install pipe A in the top of the push rod.
• Install forward marks of piston and connecting rod in the same direction.
• Lubricate the external diameter of piston pin with engine oil.
• Through pipe A, insert the push rod, piston pin and pipe component into piston pin hole from the side with the
forward mark.
• Screw on guide block B into guide pipe A to gain clearance between guide block A (2) and guide block B (1)
equal to the value of Value L (L=[(A-C)-(B-D)] / 2)
plus 3 mm.
• Keep the forward mark of piston upward. Install piston and connecting rod in tool base of piston pin installer.
ENGINE UNIT REPAIR
BESM020054
LTSM020111
LTSM020112
• Using a press, press the piston pin (1) in under pressure. When the pressure is less than standard value,
replace piston pin and piston component and/or
replace connecting rod.standard value: 7,350-
17,200 Newtons
• Check to make sure the piston can rotate freely.
Piston Ring Installation
NOTE :
The compression rings have an identification mark (1)
on the top of the ring.
Piston Ring Identification Marks:
• No. 1 Ring - 1R
• No. 2 Ring - 2R
When installing piston ring, keep the mark upwards and
towards the top of piston.
• Size markings of pistons shown as the following:
SIZE
IDENTIFICATION
Standard
None
Increase 0.50 mm
50
Increase 1.00 mm
100
CAUTION:
Do not use a piston ring expander to install the oil control rings.
Oil Control Ring Installation
• Install the main ring of oil control ring into oil ring groove.
NOTE :
There is no difference between the upper and lower oil control rings.
ENGINE UNIT REPAIR
LTSM020113
LTSM020116
02
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