Dacia SuperNova (engine E7J). Service manual — part 14

ENGINE E7J-A-2/60

10

10 - 32

ENGINE AND LOWER ENGINE UNITS

DISTRIBUTION

RECOVERY ENGINE

ENGINE E7J-A-2/60

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ENGINE AND LOWER ENGINE UNITS

On the back of the belt there is an arrow

indicating the direction of rotation, and two
tuning marks;

-the L line-up marks on the crank-

shaft pinion are aligned with the fixed mark M;
(the mark on the pinion of the cam-shaft in
down)

C

AUTION

!

The pinion of the cam-shaft

can have five line-up marks: it is only
the rectangular-shaped mark on the
face of a cog that represents the Up-
per Centre Point, all the others serv-
ing to adjust the rocker arms.

-the marks on the belt are aligned

with those on the pinions, observing the
direction of mounting and beginning from
the pinion of the crankshaft;

-the captor of the MOT 1505 appa-

ratus is placed (held in the position indi-
cated in the schema) at 5-10 mm to the
belt.

Any of the two captors can be used on

condition the two of them should not be
placed simultaneously in front of the belt.

The distribution belt is set in vibration (the

measurement is validated by a beep of the apparatus).

-the belt is stretched by operating the

stretching runner/pulley, until a value within
210 and 275 Hz is obtained;

-the stretching device is blocked, an

d its

screw-nut is tightened at 3 daNm;

-the crankshaft is wound 5 1/2 rotations

(no. 2 cylinder in the position of rocker-arm
adjustment);

-the screw-nut of the runner/pulley is

stretched until a value between 145 and 185
Hz is obtained.

C

AUTION

!

If the value of 275 Hz is ex-

ceeded, the belt can no longer be used,
and it has to be changed.

-the 0 screw-nut of the runner/pulley is tight-

ened at 5 daNm.

If not, this may get dismounted, risking the

engine damaging.

G

ENERAL

DIRECTIONS

The stretching of the belt should only be done
for the cold engine mode (i.e. ambient temperature);
-a belt which has been taken off must not be re-
mounted - it will have to be replaced by a new one.

DISTRIBUTION

RECOVERY ENGINE

ENGINE E7J-A-2/60

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ENGINE AND LOWER ENGINE UNITS

It is done only for the cold engine mode.
The adjustment values are:

-intake 0.10 mm
-exhaust 0.25 mm

1. Cam-Shaft pinion without line-up marks

a) The method called “in balance”

The cylinder valves in balance (end of

exhaust; start of intake)

1

3

4

2

The cylinder rocker-arms are adjusted

4

2

1

3

b) The method called “exhaust valve opened to the maximum”

The engine is wound (clockwise, as seen from the distribution) till the exhaust valve

of cylinder no. 1 reaches maximum opening, and the play is adjusted for the intake
valve of cylinder no. 3, and also for the exhaust valve of cylinder no. 4.

The same is done for the other cylinders, as in the chart:

Exhaust valve open to the

maximum

1

3

4

2

Intake valve to be adjusted

3

4

2

1

Exhaust valve to be adjusted

4

2

1

3

ADJUSTMENT OF ROCKER-ARMS

RECOVERY ENGINE

ENGINE E7J-A-2/60

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10 - 35

ENGINE AND LOWER ENGINE UNITS

2. Cam-Shaft pinion with line-up marks:

The engine is wound until it reaches the Upper center point (cylinder no. 1 at

ignition), then further up to the first line-up mark.
-what is adjusted: exhaust 1
exhaust 3

-for the second mark:

-what is adjusted: intake 1
intake 3

-for the third mark:

-what is adjusted: exhaust 2
exhaust 4

-for the fourth mark:

-what is adjusted: intake 2
intake 4

ADJUSTMENT OF ROCKER-ARMS

RECOVERY ENGINE