Chery A11. Manual - part 23

CAC Gasoline Engine Maintenance And Servicing Manual

4. The removal and installation of oil pump with oil seal assembly

removal：
——Loosen six M6×30 hexagonal flange surface bolts. Remove the
bolts (as the figure indicates )
——Remove oil pump with oil seal assembly

——Pry out the front oil seal of crankshaft by screwdriver or chisel.
Note: Don’t damage the front oil seal bore.

——Remove seven M6 countersunk head screws (as the arrow in
figure indicates )
——Remove oil pump cover

——Take out the inner and outer rotor

Fig. 79

Fig. 80

Fig. 81

Fig. 82

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CAC Gasoline Engine Maintenance And Servicing Manual

——Check the clearance between outer rotor of oil pump and case bore
of oil pump.

The clearance between outer rotor of oil pump and case bore of oil

pump should be 0.06—0.19mm.

——Check  the  radial  clearance  between  inner  rotor  and  outer  rotor  of
oil pump.
        The  radial  clearance  between  inner  rotor  and  outer  rotor  of  oil
pump should be 0.05—0.18mm.

——Check the end play of rotor
        The end play of rotor should be 0.014—0.100mm.

——Remove horizontal hexagonal socket head plug (small one)
——Take out the spring of relief valve and plunger of relief valve.
——Check the spring load and free length
        spring free length is 46mm。
        spring load is 32.8N±2N when the length is 29mm.
        installation length of relief valve spring is 38.5mm.

Fig. 83

Fig. 84

Fig. 85

Fig. 86

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CAC Gasoline Engine Maintenance And Servicing Manual

——If relief valve spring is not to specification, it must be
replaced.

Installation：
——Install  the  outer  and  inner  rotor  into  the  oil  pump  house
ensuring      the installation mark of outer and inner rotor upward.
——Install  oil  pump  cover  on  oil  pump.  Tighten  seven  chamfer
head screws. tightening torque is 7-10Nm.

——Install  relief  valve  and  relief  valve  spring  into  the  oil  pump
bore.
——Screw  3/8″plug  screw  into  the  oil  pump  house.  keep  it  in
place.    tightening torque is 20-25Nm.
——Stick  the  new  oil  pump  sealing  gasket  on  the  front  end  of
cylinder block.
——Install the oil pump into the front end  of crankshaft.    center
the inner bore of inner rotor Before installation.

——Screw six mounting bolts by hand.
——Check and adjust the roughness of lower surface of oil pump
and flange surface of cylinder block oil pan. It should be within the
range:±0.26mm.
——Tighten the retaining bolt of oil pump to 8-11Nm.

——Apply the engine oil on the oil seal journal of crankshaft.
——Wrap a plastic tape on the oil seal journal of crankshaft
avoiding to damage the edge of front crankshaft oil seal .

——Apply engine oil on the edge of front crankshaft oil seal.
Press the oil seal in place using appropriate socket or sleeve and
crankshaft pulley and pulley bolt and washers.

Fig. 87

Fig. 88

Fig. 89

Fig. 90

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CAC Gasoline Engine Maintenance And Servicing Manual

——Remove the thin plastic protective tape

removal and installation of oil filter and oil
pressure sensor.
Removal：

——Remove the oil filter. rotate oil filter counterclockwise

during removal.

——Remove the oil pressure sensor
Installation：

——Apply engine oil on the sealing gasket of oil filter and

screw into the connector. Tightening torque is 12－17Nm.
Or screw into oil filter by hand. once rubber sealing gasket
contacts cylinder block, tighten another 3/4－1 turns.

——Apply Lotite 243 sealant and screw it to the main oil

passage of cylinder block. Tightening torque is 25 －
29Nm.

The threaded hole of oil pressure sensor is 1/4″－18NPTF.
The operating voltage of oil pressure sensor is 6－24V.

The starting warning pressure is 30±15kPa.

Fig. 91

tightening torque 18.0-25.0Nm

oil pressure

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