Engine 2.0 (Chery Fora, A21). Manual — part 11

CHERY A21 SERVICE MANUAL

MECHANISM OF 2.0NALC ENGINE

41

CHERY A21 SERVICE MANUAL

MECHANISM OF 2.0NALC ENGINE

42

7) Inspect

cylinder

a: Inspect if the cylinder wall is scratched

or scored.

If there are cylinder scoring

and scratching you need to hone cylinder
wall, replace cylinder liner or replace
cylinder block.

b: Examine the inner diameter and

cylindricity of cylinder with cylinder
gauge.

Standard

value

Inner diameter

83.5

cylindricity 0.008

cylindricity= Maximum bore

－ Minimum

bore/2

As the picture, measure the bores of 3 planes
along both A direction and B direction
respectively. Get the maximum and the
minimum from 6 values, and then subtract the
half of Minimum from the Maximum to get
cylindricity;

3.2.3 Installation

1) Spread oil on the piston pin and in the

piston pin hole, connect the piston and
connecting rod with piston pin, and
mount the piston pin circlip.

2) Mount the piston ring. Mount the rings

on the piston in the sequence of oil ring
expander, upper and lower segments, 2nd
air ring and 1st air ring; Pay attention to
the direction of piston ring, the side with
“

TOP

” should be upward. The two

segments and expander are staggered.
The angle of expander connector points
to the top of piston, and the 1st ring and
2nd ring form

120°

with the upper

expander.

12 mm

Center

Bottom

The Openings Of Rings Form

120°With Each Other

CHERY A21 SERVICE MANUAL

MECHANISM OF 2.0NALC ENGINE

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3) Mount the upper bearing of connecting

rod and the connecting rod together.

Note: the gap on bushing should be orderly
with that of connecting rod.

4) Spread the engine transmission oil in the

engine cylinder, clasp the piston ring
with special tool, tap the piston head
with wooden handle and encase the
piston connecting rod assembly.

Note: the end of connecting rod with a point
should face the cylinder and consists with the
arrowhead on the top side of piston.

CHERY A21 SERVICE MANUAL

MECHANISM OF 2.0NALC ENGINE

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5) Mount the lower bearing of connecting

rod and the connecting rod cap together.
Then spread engine transmission oil.

Note: the gap on bushing should be orderly
with that of connecting rod.

6) Close the connecting rod cap and screw

down the bolt.

Torque: 25±3N•m, then screw 90°±5°

7) Examine the axial clearance of

connecting rod.

Examine the axial clearance with micrometer
guage or feeler gauge.

Standard Value

（mm）

Clearance

0.15—0.50

8) Mount the engine oil strainer.

9) Mount the oil pan.

10) Mount the cylinder head.

11) Mount the timing belt during timing

adjusting.

4.Replace front oil seal of crankshaft

4.1 Needed tools and auxiliary materials

Ratchet wheel and ratchet rod, 13#, 15#, 17#,
22# sleeve, 13# open end wrench, allen
wrench, engine transmission oil and guide
sleeve of crankshaft oil seal

4.2 Process of Replacement

4.2.1 Process of Removal

1) Dismantle the timing belt (See

“replacing the timing belt” for details).