Chery SQR 7160 sedan. Manual - part 30

CAC Gasoline Engine Maintenance And Servicing Manual

Installation of the piston and rod assembly：

        Apply  engine  oil  on  piston,  piston  ring  and  cylinder  bore.
Stagger 120°among the first    compression ring, the second ring
and oil ring cotter, then install piston rod into cylinder bore. push
the piston an rod assembly by hammer into the cylinder bore.
——Apply  engine  oil  on  the  connecting  rod  bushing.  Mount
connecting rod cap. Retain connecting rod body and cap with two
elastic retaining pins.
——Tighten connecting rod bolt  to 30—36Nm. apply  engine  oil
on the bolt head and bolt threads before installation.
——The side play of big end is 0.092—0.268mm。

【10】The  removal  and  installation  of  flywheel  assembly  and
carrier assembly of real
crankshaft oil seal

1). The removal and installation of flywheel assembly
removal：
——Remove six M10 bolts and replace bolts.
——Remove  flywheel.  Check  if  there  is  crack  in  the
surface  of  clutch  plate.  Check  ring  gear  teeth  for
crack ,wear, pitting .
Installation：
——The  press  fit  clearance  of  gear  ring  and  flywheel  is
0.48—0.86mm.  The  gear  ring  should  be  pressed  when
heated to 300℃.
——The  retaining  hole  of  flywheel  and  the  retaining
journal  of  crankshaft  is  of  clearance  fit.  clearance  is
0.012—0.074mm.  Try  to  push  it  lightly  after  centering.
Don’t strike the crankshaft by the hammer.
——During  assembling,  align  the  installation  mark  hole
and  fabrication  hole  on  the  crankshaft.  Screw  in  6  new
bolts  by  hand.  Bolts  should  have  sealant  on  them.
Tightening torque is 82—92Nm.

Fig.56

Fig.57

gage hole

Install mark bore

Flywheel
assembly

Retaining
pin

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CAC Gasoline Engine Maintenance And Servicing Manual

2). The removal and installation  of carrier assembly  of the real oil
seal:
Removal：
——Remove 4 bolts (as arrow indicates).
——Take out carrier assembly of the real oil seal
——Remove carrier sealing gasket of the real oil seal

——Use  chisel  or  screwdriver  to  pry  the  real  oil  seal  from  the
carrier of the real seal oil. Note: please don’t damage the carrier of
real oil seal.

Installation：
——Position the carrier on the  vise  which is  equipped  with wood
on the jaw.
——Align rear oil seal carrier hole with the part number side of oil
seal outward .press oil seal into rear oil seal carrier with vise.. The
magnitude  of  interference  for    real  oil  seal  and  carrier  hole  is
0.26—0.50mm.
——Install new sealing gasket of    real oil seal carrier .
——Install real oil seal carrier assembly. Before assembling, wrap
a piece of plastic piece on the crankshaft to avoid damaging oil seal.
At the same time, apply engine oil on oil seal edge and journal for
oil seal .
——Measure the roughness of lower oil seal carrier surface and oil
pan  flange surface  of  cylinder block.    It should be adjusted to the
range of  ±0.26mm.

Fig.58

Fig.59

Fig.60

Fig.61

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CAC Gasoline Engine Maintenance And Servicing Manual

——Tighten four M6 bolts to
8.0 —11.0Nm。
——Remove the plastic piece.

【11】. Removal and installation

crankshaft, crankshaft thrust washer, halves and main bearing cap

Removal：
——Before removing, check the end play of crankshaft first.
Use the plunger of dial indicator to contact bearing face of the crankshaft
( lightly compressing).

Push the crankshaft away from the contacting tip. Adjust dial

indicator to zero and then use post to push the crankshaft towards
contacting tip as much as possible. Check dial indicator. The reading is
end play. The end play of the crankshaft should be 0.092—0.303mm.

If dial indicator is not available, the end play of the crankshaft

may be  checked by  feeler leaf. Between the  third  main bearing cap and
crankshaft,  it  should  be  checked  by  feeler  leaf  (push  and  pull
crankshaft)。
——Loosen main bearing bolt and stud，(start with the middle bearing
cap), take  out  the bolt and stud, remove  main bearing cap and the  other
shell of main bearing bushings. The other shell of main bearing bushing
is still kept in main bearing cap.
——Remove the crankshaft.
——Remove  the  thrust  plates  of  crankshaft  (two  pieces)  from  the
cylinder block.
Check：
——Check main journal and main bearing bushing clearance .

Clean the main journal of crankshaft, inner bore of main bearing

cap and main bearing bushings with non-woven. Put plastic
clearance  gauge  on  the  main  journal  paralleling  with  the  generatrix  of
main journal. Its length should be a little shorter than the width  of  main
journal.

Note: Don’t rotate the crankshaft!

Mount the main bearing cap. Screw the bolt of main bearing cap

by hand. Tighten to 90—100Nm. Don't rotate the crankshaft.

Remove main bearing bolt. Take out the main bearing cap

Fig. 62

Fig.63

Fig. 64

Sealing plate

M6 bolt×20（4）
Tighten torque 8~11Nm

Fig.62

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CAC Gasoline Engine Maintenance And Servicing Manual

carefully. Arrange them according to the sequence. Read the bearing clearance
according to the proportion stated in the cover of plastic clearance gauge.
Check the bearing clearance from the third main bearing and extending to the
two sides. The clearance of main bearing is 0.011—0.058m m.
——Check clearance of connecting rod bearing

Use the above method to check clearance of connecting rod bearing.

Clearance of connecting rod bearing is 0.006—0.06mm.

——The size of connecting rod journal and connecting rod
bushing： unit：mm

——The size of main journal and main bearing half：

unit：mm

Level

The diameter of connecting

rod journalφ

The thickness of

connecting rod

bushing

standard

47.89—47.91

1.480—1.487

ndersize 0.025

47.89—47.91

1.492—1.499

undersize 0.25

47.64—47.66

1.605—1.612

undersize 0.5

47.39—47.41

1.730—1.737

undersize 0.75

47.14—47.16

1.855—1.862

undersize 1.0

46.89—46.91

1.980—1.987

Level

The diameter.

of main

journal

The diameter of

main bearing bore

of cylinder body

The thickness

of main

bearing half

shell

Standard

57.98—58.00

62.2935±0.0065

2.131—2.138

oversize 0.4

57.98—58.00

62.6935±0.0065

2.331—2.338

undersize

0.002

57.98—58.00

62.2935±0.0065

2.141—2.148

undersize 0.25 57.73—57.75

62.2935±0.0065

2.256—2.263

undersize 0.50 57.48—57.50

62.2935±0.0065

2.381—2.388

undersize0.75

57.23—57.25

62.2935±0.0065

2.506—2.513

undersize 0.25

oversize 0.4

57.73—57.75

62.6935±0.0065

2.456—2.463

undersize 0.50

oversize 0.4

57.48—57.50

62.6935±0.0065

2.581—2.588

undersize 0.75

oversize 0.4

57.23—57.25

62.6935±0.0065

2.706—2.713

Fig.65

Fig. 66

Fig. 67

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