Chery A series. Manual — part 12

CAMSHAFT

CAMSHAFT GEAR

Removal

Rotate the crankshaft to the compression TDC
position of the first cylinder.

Remove the belt.

Put one pole into one hole of the cam shaft gear to
lock it. Loosen the gear bolts and remove them and
the gasket.

Note:

New bolts shall be used for reinstallation. The
camshafts of different engines are not
interchangeable. In case the cam shaft shall be
replaced, replace it with a new one according to
the indicators on the original gear.

Installation

Check whether there are abrasion, pit corrosion or
scrapes on the gear.

Install the whitney key of the cam shaft, with a
protrusion height of 1.64-2.11mm.

Install the camshaft gear onto the camshaft and put
new bolts into the gasket. The new bolts that
haven’t been applied with a coat of glue in
advance shall be applied with a coat of glue first
and be tightened for a moment of 52-60N.m.

Check whether the crank shaft is in the
compression TDC position.

CAMSHAFT AND CAMSHAFT THRUST
SPACER

Removal

Measure the axial clearance of the cam shaft,
which shall be between 0.049~0.129mm.

Loosen the bolts of the thrust spacer to take them
out.

Take the thrust spacer out (as illustrated in the
figure).

B-25

Draw the cam shaft assembly out from the rear end
of the cylinder head and be careful not to damage
the cam shaft hole of the cylinder head during this
process.

Inspection

Check whether there is any abrasion on the cam
and the journal of the cam shaft. Change the one
with serious abrasion.

Change the thrust space if the axial clearance of
the cam shaft is above the specification.

Measure the bore diameter of the cam shaft of the
cylinder head or check the relative displacement of
the journal and bore with the cam shaft. Change the
cam shaft if the bore is excessively wore.

Cam Height

Engine model

Admission cam T (unit: mm)

Exhaust cam T (unit: mm)

480 38.602

37.586

480E 37.559

37.559

B-26

SIZE OF CAMSHAFT JOURNAL AND
HOLE OF THE CYLINDER HEAD

Installation

To replace the cam shaft, observe the shape of the
rear end of the cam shaft for right selection.

Before installation, apply the cam of the cam shaft
with hyperbolic gear oil or motor oil. The cam
shaft shall be assembled from the cylinder head in
a back-to-front order.

Apply some motor oil to the thrust spacer of the
cam shaft and put the thrust spacer into the groove
of the cylinder head.

Screw two bolts into the threaded holes of the
thrust spacer and tighten them for a moment of
9—13Nm.

Check the axial clearance of the cam shaft, which
shall be within the specified range.

If adopting oversized hydraulic tappet (0.25), a
carefully selected cam shaft shall be used,
otherwise it will block the hydraulic tappet.

1. Standard size

Number of cam shaft

journal

Diameter of cam shaft journal

(unit: mm)

Diameter of the cam shaft hold of the

cylinder head (unit: mm)

1 44.74—44.76 44.783—44.808

2 44.99—45.01 45.033—45.058

3 45.24—45.26 45.283—45.308

4 45.49—45.51 45.533—45.558

5 45.74—45.76 45.783—45.808

2. Oversized (0.38)

Number of cam shaft

journal

Diameter of cam shaft journal

(unit: mm)

Diameter of the cam shaft hold of the

cylinder head (unit: mm)

1 45.12—45.14 45.163—45.188

2 45.37—45.39 45.413—45.438

3 45.62—45.64 45.663—45.688

4 45.87—45.89 45.913—45.938

5 46.12—46.14 45.163—45.188

B-27

CRANKSHAFT

CRANKSHAFT, CRANKSHAFT THRUST
SPACER, BEARING SHELL AND MAIN
BEARING CAP

Removal

Check the axial clearance of the crank shaft before
removal.

Kiss the end side of the crank shaft with the
contacts of a dial gauge (less degree of shrinkage).
Push the crank shaft away from the contacts and
adjust the dial gauge to 0, then push the crank shaft
to the direction of contacts as possible with a0 stout
carrying pole. Check the reading of the dial gauge,
which shall be the axial clearance. The axial
clearance of a crank shaft is 0.092-0.303mm.

The leaf of a clearance gauge can be used to check
the axial clearance of a crank shaft if there is no
dial gauge, which shall be placed between the third
main bearing cap and crank shaft (push and pull the
crank shaft).

Loosen the bolts and studs of the main bearing
shell, (beginning from the middle bearing cap),
take out the bolts and the threaded rods to remove
the main bearing cap and the lower shell of the
main bearing shell. This lower shell shall still
remain in the main bearing cap.

Take the crank shaft out.

Remove the crank shaft thrust spaces (2 pieces)
from the cylinder block.

Inspection

Check the main journal and main bearing shell
clearance.

Clean the main journal of the crank shaft, the
internal bore of the main bearing cap and main
bearing shell with a non-woven fabrics. Place the
plastic clearance gauge (its length slightly shorter
than the length of the main journal) on the main
journal, which shall be in parallel with the
generator of the main journal.

Note: Do not rotate the crank shaft！

B-28