Chery A11. Manual — part 17
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
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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
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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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2.Cylinder cover bolts removal and cylinder head assembly installation
Cylinder head bolts removal：
——Rotate camshaft until keyway is rightly upside.
——Loosen cylinder cover bolts in order as specified in
diagram.
——Note：Cylinder cover bolts must be replaced after
removed and are not permitted to reuse.
Cylinder head assembly reinstallation：
——Check whether cylinder head contact surface
roughness is 0.15mm or less.
——Clean the tapped holes in cylinder block，there should
not be deposits in tapped hole，or fluid pressure resulting
from bolts screwing may possibly results in cylinder block
cracking.
——Rotate crankshaft until no.1 cylinder piston is 20mm
or so under the deck of cylinder block to keep the valves in
cylinder head assembly from contacting piston head.
——Match cylinder head gasket with dowels.
Note：
For cylinder head gasket mark, 2 tooth indicates 478，
1 teeth indicates 480 ,and position cylinder head gasket
with part number side upside.
——Install cylinder head into place with camshaft keyway
perpendicularly downward.
Note：Cylinder head gasket may only be used once ，gasket
should be replaced if cylinder head is removed.
A dowel B cylinder head
gasket
Fig.23
Fig.22
Fig.20
Fig.21
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