Chery SQR 7160 sedan. Manual — part 26
CAC Gasoline Engine Maintenance And Servicing Manual
22
Note：With belt removed， don't turn gear excessively，or piston
head and valve may be damaged for contacting.
——If belt need to be reused ，check for improper
wear ,delaminate crack (particularly at the foot of teeth) or dirt. If
lightly suspected, replace it.
Installation and adjustment：
——Crankshaft should be positioned at no.1 cylinder TDC，if
necessary, crankshaft may only be turned slightly for adjustment
and blocked at flywheel ring gear.
——Engage timing belt tooth with crankshaft grooves，and pull
belt up straight to the right engaging belt with cam gear grooves.
During the installation of used belt, insure belt is in the right
direction and match belt with appropriate tooth.
With belt installed, 2 gears should not make any movement.
——Pull belt around tension pulley carefully，engage belt tooth
with gear teeth grooves.
Recheck both gears, there should be no movement.
——Loosen 2 tension pulley mounting bolts，push tension pulley
right to the extreme (viewed from the direction of pulley )，
tighten
2 tension pulley mounting bolts and loosen crankshaft locking
device.
——Rotate crankshaft clockwise (viewed from the pulley end) 2
turns until no.1 cylinder reaches its TDC of compression.
——Grab the midway of the right side belt between crankshaft
gear and camshaft gear with thumb and forefinger. If belt tension
is as specified, belt may be twisted 90°.
To adjust belt tension，loosen 2 tension pulley mounting bolts and
push tension pulley right side using screwdriver as push rod，then
tighten mounting bolts and rotate crankshaft. Recheck tension.
It may take 2- 3 times before tension is as specified. After
adjustment, tighten tension pulley mounting bolts to 16—20Nm.
——It is only a approximate method to adjust belt，and belt
tension should be checked as soon as possible by professionals
with special tools .
Fig.13
Fig.14
CAC Gasoline Engine Maintenance And Servicing Manual
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【6】、Tension pulley, crankshaft gear and camshaft gear removal, check and installation
1. Tension pulley
Removal：
——Rotate crankshaft to no.1 cylinder
compression TDC.
——Remove belt.
——Loosen 2 tension pulley mounting bolts，
push tension pulley aside to release belt tension
with a large screwdriver.
——Remove 2 mounting bolts and take out
tension pulley.
Installation：
——Check bearing for rotating freely by
turning tension pulley，bearing end play and
radial clearance, if suspected, replace
appropriate parts immediately.
——Crankshaft should be positioned at no.1
cylinder compression TDC.
——Install belt tension pulley，finger screw in 2
mounting
bolts,
then
tighten
to
16—20Nm.2.Camshaft gear.
Removal：
——Rotate crankshaft to no.1 cylinder
compression TDC
——Remove belt.
——Insert a lever into one of the camshaft gear
holes to block camshaft，then loosen gear bolt
and remove bolt and cushion block.
Note：During reinstallation，new bolt should be
applied , remove camshaft gear.
——Camshaft gears are not permitted to be
exchanged between 478 engine and 480 engine，
during replacement, the mark on the original
gear should be referred.
Crankshaft gear
Tension pulley
Timing gear
key
cushion
Bolt M12*1.5*30
Tightening torque52-60n.m
key
Bolt M8*25
Tightening
torque16-20Nm
Fig.15
Fig.16
CAC Gasoline Engine Maintenance And Servicing Manual
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Installation：
——Check gear tooth for wear, pitting or scratch.
——Install camshaft semicircular key，protrusion should
be 1.64—2.11mm.
——Install camshaft gear on camshaft with new
bolt though cushion block，new bolt should be
pre-pasted and tightened to 52—60Nm.——Check
whether crankshaft is positioned at compression TDC.
3.Crankshaft gear
Removal：
——Block crankshaft and remove belt.
——Pull out crankshaft gear with puller or 2 large
screwdrivers，then remove semicircular key.
Installation：
——Check gear tooth for wear, pitting or scratch.
——Install semicircular key，protrusion should be
1.392—1.739mm.
——Install shim with curved face side forward.
——Install crankshaft gear with boss side forward, and
then press crankshaft gear onto boss using a assistant
pulley and pulley bolt.
【7】、Camshaft oil seal removal and installation
Removal：
——Remove camshaft gear.
——Note the direction of oil seal installation, pry out oil
seal from the oil seal hole in cylinder head，be sure not
damage the oil seal hole.
Installation：
——Clean the oil seal hole in cylinder head ,apply clean
engine oil on oil seal edge and camshaft oil seal journal，
install oil seal on oil seal journal carefully，push oil seal
in perpendicularly into place with a appropriate cushion
block and used camshaft gear bolt. An appropriate socket
wrench may be used to push oil seal into place.
Fig.17
Fig.18
CAC Gasoline Engine Maintenance And Servicing Manual
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【8】、Valve mechanism and cylinder head removal, check and installation
1.Valve mechanism for 478 and 480 engine：
Rocker arm-8
Valve locking piece-16
Rocker arm seat-8
Fit
clearance
with
hole
0.023/0.065
Rocker arm stud-8
Tightening torque 18-23Nm
Upper Valve spring seat -8
Valve spring -8
Valve oil seal spring seat assy-8
Assembly before valve oil seal
spring and valve installation
Rocker arm seat washer-8
hydraulic lifting rod-8
Rock arm nut-8 .tightening torque
25-29n.m
Exhaust valve-4. fit clearance between left valve
stem and valve guide is 0.046-0.095
Intake valve-4. fit clearance between valve
stem and valve guide is 0.02-0.069
Fig.19
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