Engine 2.0 (Chery Fora, A21). Manual - part 9

CHERY A21 SERVICE MANUAL

         

MECHANISM OF 2.0NALC ENGINE 

33 

2 Replace the engine oil strainer 

2.1

 

Needed tools and auxiliary materials 

10# open end wrench, 10#, 15#, 17# sleeve, 
ratchet wheel and ratchet rod, Le Tai 5901 
Glue, engine oil 

2.2

 

Process of replacement 

2.2.1

 

Process of removal 

1)

 

Remove the oil pan.

（See “replace oil 

pan” for details

） 

2)

 

Remove the connecting bolt between 
engine oil strainer and frame with 10# 

sleeve wrench.

（total 8 bars） 

 

3)

 

Draw out the engine oil strainer 
carefully. 

2.2.2

 

Installation 

1)

 

Spin the nozzle of engine oil strainer 
into the frame carefully. 

2)

 

Mount the 8 bolts for the strainer and 
fasten them. 

Note: the bolts should be mounted with Le 
Tai 243 glue.   

Torque: 8±3Nm 

3)

 

Install oil pan (See “installation of oil 
pan” for details).   

 

CHERY A21 SERVICE MANUAL

         

MECHANISM OF 2.0NALC ENGINE 

34 

 

3

 

Replace the piston, piston ring, piston 
pin and connecting rod bearing 

3.1

 

Needed tools and auxiliary materials 

10# open end wrench, 10#, 15#, 17# sleeve, 
ratchet wheel and ratchet rod, Le Tai 5901 
Glue, engine oil, torque wrench Special tools 
for installing piston, feeler gauge, clearance 
gauge, micrometer caliper 

3.2

 

Process of replacement 

3.2.1

 

Process of removal 

1)

 

Dismantle the timing belt (see 
“dismantle the timing belt” in the 
section of “replacement of engine 
timing belt” for details).   

2)

 

Remove the oil pan

（see REPLACE OIL 

PAN for details.   

3)

 

Remove the cylinder head. (see 
“removal of cylinder head” for details). 

4)

 

Dismantle the engine oil strainer (see 
the “replacement of engine oil strainer” 
for details). 

 

5)

 

Loosen the big bolt on connecting rod. 

 

6)

 

Remove the connecting rod bearing 
lower cover. 

 

 

Connecting Rod 

Bearing Lower Cap

CHERY A21 SERVICE MANUAL

         

MECHANISM OF 2.0NALC ENGINE 

35 

 

7)  Uplift the connecting rod and the piston 

with a wooden stem and then remove 
the connecting rod and piston assembly. 

 

8)  Remove the piston ring. 

9)  Remove the retainer ring of piston pin 

and draw out the piston pin. 

Note: With large tension, the retainer ring 
may hurt people in the process of removal. 

 

3.2.2 Inspection 

I. Check 

piston 

1)  Examine the diameter of piston. 

Measure the diameter along the vertical 
direction to piston pin and at the place 11mm 
under piston skirt with micrometer caliper. 

Cylinder No. 

Standard Size 

1 

83.46±0.009 

2 

83.46±0.009 

3 

83.46±0.009 

4 

83.46±0.009 

Replace with the new one if the part cannot 
be worn and torn any longer. 

 

Retainer Ring 

CHERY A21 SERVICE MANUAL

         

MECHANISM OF 2.0NALC ENGINE 

36 

 

2)  Examine the clearance between piston 

ring and ring groove. 

a.  Clean up the accumulated carbon in the 

ring groove with piston ring. 

 

b.  Examine the clearance between piston 

ring and ring groove with feeler gauge. 

 

Reference Value

（mm） 

1

st

 Ring 

0.04--0.08 

2

nd

 Ring 

0.01--0.025 

Replace with the new one if the examined 
clearance cannot be worn and torn any 
longer. 

 

3)  Inspect the end clearance of piston ring. 

a.  Put the piston ring at the position 45mm 

below the top surface of cylinder 
aperture and push the piston ring into 
cylinder with piston. 

 

b.  Measure the opening with feeler gauge. 

Replace with the new piston if the examined 
clearance exceeds the limit.