Chery Tiggo. Manual — part 67
Inspection
Crankshaft Axial Clearance
• Check the axial clearance of the crankshaft.
CRANKSHAFT AXIAL CLEARANCE
DESCRIPTION
SPECIFICATION
MAXIMUM LIMIT
Crankshaft
0.05 - 0.18 mm
0.25 mm
Crankshaft Bearing Oil Clearance (Plastigauge)
• Check the oil clearance of the crankshaft.
− Clean all engine oil off of the crankshaft jour-
nals.
− Cut the plastigauge into lengths as wide as
the crankshaft journal.
− Lay the plastigauge across the crankshaft
journal.
− Carefully install the main bearing cap.
− Torque the main bearing cap to the specified
torque.
− Carefully disassemble the main bearing cap.
− Use the measuring rule imprinted on the plas-
tigauge package to measure the width of the
widest part of the plastigauge.
ENGINE UNIT REPAIR
BESM020076
BESM020077
CRANKSHAFT BEARING OIL CLEARANCE
Standard Clearance
0.02 - 0.04 mm
Maximum Clearance
0.1 mm
Crankshaft Main Journal Roundness
• 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 0.006 mm. Limits of roundness on any
crankshaft rod journals should be held to 0.006
mm. DO NOT nick crank pin or bearing fillets. Lim-
its of out of round on any crankshaft journals
should be held to 0.006 mm.
CRANKSHAFT MAIN JOURNALS
DESCRIPTION
SPECIFICATION
MAXIMUM LIMIT
Crankshaft Journal Roundness
0.006 mm
0.006 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.
Before installing the main bearing bolts, clean the threads and oil the bolts with clean engine oil.
Crankshaft Main Bearings
• Perform the following when replacing the crankshaft main bearings:
− Measure and record the external diameter of
the crankshaft main journals.
ENGINE UNIT REPAIR
BESM020075
LTSM020119
02
• Identify the bearing markings (1) & (2) on the cylin-
der block.
• The bearing will have an identification mark (1)
imprinted in the position as shown.
IDENTIFYING CRANKSHAFT MAIN BEARINGS
Combination of Crankshaft Main Journal and Spindle Bore
Identification
mark and color
of No. 1, 2, 4, 5
journal bearing
Identification
mark and color
of No. 3 journal
bearing
Crankshaft Main Journal
Identification
mark of spindle
bore
Group
Identification
Color
External
Diameter (mm)
1
Yellow
56.994 - 57.000
0
Green
Black
1
Yellow
Green
2
None
Yellow
2
None
56.988 - 56.994
0
Yellow
Green
1
None
Yellow
2
Blue
None
3
White
56.982 - 56.988
0
None
Yellow
1
Blue
None
2
Red
Blue
NOTE :
As an example, if the identification color of the crankshaft main journal is yellow and the identification mark of spindle
bore is “1”, choose the No. 1,2,4,5 bearing of which identification mark is “2” and identification color is “yellow” and
No.3 bearing of which identification mark is “1” and identification color is “green”.
ENGINE UNIT REPAIR
LTSM020127
LTSM020181
• Main bearing and thrust bearing installation.
− Install the main bearings with oil grooves on
the cylinder block side.
− Install the main bearings without oil grooves
(2) on the bearing cap.
− Install the two thrust bearings on crankshaft
journal No. 3. Apply clean oil to the surface of
thrust bearing.
− The grooved (1) side of the thrust bearing
should face towards the crankshaft.
Main Bearing Caps and Bolts
• Install the main bearing caps with the arrow on the main caps (1) facing the front of the engine.
• Install the main bearing cap bolts in the sequence
shown.
• Torque the bearing cap bolts in the sequence
shown to 25 N·m.
• Tighten the main bearing cap bolts an additional 90°- 100° in the sequence shown.
CAUTION:
If the bolts are over tightened (exceed angle of
100°), loosen the bolts and restart the torque
sequence from Step 1
• After installing the main bearing caps, assure that the crankshaft rotates smoothly.
ENGINE UNIT REPAIR
LTSM020128
LTSM020129
LTSM020130
02
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