Chery Fora (Elara A520). Manual — part 59

CHERY A21 SERVICE MANUAL

MECHANISM OF 2.0NALC ENGINE

39

Note: Do not rotate the crankshaft during the
process.

CHERY A21 SERVICE MANUAL

MECHANISM OF 2.0NALC ENGINE

40

Loosen the connecting rod bolt, remove the
cap, and measure the maximum width of
pressed clearance gauge with the ruler on its
package to get the clearance value.

Replace with the new connecting rod bearing
if the examined clearance exceeds the limit.

Note: Use the same brand consistent with
assorting sign when you replace the bearing
bushing.

Standard

Value

Abrasion

Limit

Clearance 0.016—0.051

Selection of connecting rod bearing:

You may select the connecting rod bearing by
observing the sign on the first balance weight

at the front end of crankshaft.

（see picture,

unavailable

）

6)

Inspect the planeness of cylinder block
surface.

a:

Clean the upper surface of cylinder
block.

b:

Check with ruler and feeler gauge
whether the surface of cylinder block is
warped. (Measure it in the sequence of
A, C, D, E, F, G in the picture)

C:

Revise it if the warping amount is
excessive.

Replace with the new cylinder if it exceeds
the limit. The maximum for the sum of
permitted abrading thickness of cylinder
block and cylinder head is:

Standard

Value

limit

value

warping

amount

0.04

Clearance Gauge of Plastic

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