Dacia SuperNova (engine E7J). Manual - part 13

ENGINE E7J-A-2/60

10

10 - 28

ENGINE AND LOWER ENGINE UNITS

The set is mounted in the crankcase in the

previously established order, and it is made
sure that a 0.1 mm-long wedge passes
between the jackets

The  jackets are blocked by means of

MOT.484 stand.

Mount connecting-rod bearings

(connecting rod bearings are identical).

The  crankpins and the bearings are

oiled.

The bearing caps are mounted. On no.

1  cap (in the K area) a thin layer of
RHODORSEAL 5661 is applied.

The screws are tightened at 2.5 daNm,

and then at an angle of 43

o

+/-6

o

.

The axial play of the crankshaft is

checked; it must be within:

* 0.045 and 0.852 with wear;
* 0.045 and 0.252 without wear.

MOT. 484

THE CYLINDER CRANKCASE

Take up the bearings of bearing on the housing

cylinders.  Half-be aring liners that  are  to be
mounted on crankshaft bearing are provided with
oiling holes.

Be a ring liners a re  ma tchning w ith the

crankshaft in two classes, as follows :

Marking on bearing linersMarking on crankshaft
Red

A

Blue

B

Identification of matching classes on

crankshaft is done by marking on the
counter-balance from number 5 bearing
liner.

Crankshaft marking example :

A

A

B

A

B

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ENGINE  E7J-A-2/60

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10 - 29

ENGINE AND LOWER ENGINE UNITS

The axial bushes can have: 2.80 mm,

2.85 mm, 2.90 mm, 2.95 mm.

The rod caps are mounted and tightened

at 4.2 daNm.

To check:

-the horizontal play of the rods;
-the rotation of the whole set.

To mount:

-the oil-pump (check the existence

of the centring jacks); the screws are tight-
ened at 2.5 daNm;

-the pinion and the carrying chain of

the oil-pump;

-the oil-seal ring on the front cap

(which is oiled), by means of the MOT
550 device;

-the front cap of the crankshaft; the

watertight-sealing is  done with LOCTITE
518 (the girdle must be 0.6 - 1mm thick);

-the oil-seal ring on no. 1 bearing -

by means of  MOT 1129 - 01.

The brim and the outer part of the oil-

seal ring are oiled.

550

THE CYLINDER CRANKCASE

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ENGINE E7J-A-2/60

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ENGINE AND LOWER ENGINE UNITS

Mount the lower casing and tighten the screws at a moment of 1daNm.
The watertight-sealing is done with RHODORSEAL 5661; girdle D must be 3 mm thick.
Do not forget to replace the two crescent-shaped fittings (in the A area) with new

ones.

-the flywheel: beforehand oil the face for the placing of the flywheel on the crank-

shaft, using LOCTITE AUTOFORM; apply on the screws one drop of LOCTITE
FRENETANCH and tighten them at 5 - 5.5 daNm, after having blocked the flywheel
by means of the cogged sector MOT 582.

-the clutch (be cautious about the centring): screws are tightened at 2 daNm;
-the water-pump (the watertight-sealing is done  with LOCTITE 518, the H girdle

must be of 0.6 - 1 mm). The screws are tightened at a couple of 1 - 2 daNm.

LOWER CASE

RE-MOUNTING

THIS OPERATION IS ALSO VALID IN CASE THE CRANKCASE IS RE-

MOUNTED ON THE CAR (SEE PAGE 10-36)

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ENGINE  E7J-A-2/60

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10 - 31

ENGINE AND LOWER ENGINE UNITS

CYLINDER  HEAD RE-MOUNTING

.

The following are to be mounted:

-the jack for cylinder-head centring

on the block;

-the new cylinder-head fitting;
-the cylinder-head (after the stand

has been taken apart); the joining surface
cylinder crankcase- cylinder-head is care-
fully cleaned;

-the cylinder-head screws (whose

threads and screw-ends are oiled).

THE METHOD OF TIGHTENINGT

THE  CYLINDER-HEAD

1. Pre-compressing the fitting

-all the screws are tightened at 2

daNm, then at 97

o

+/-2

o

, in the order below:

-wait for 3  minutes   - the

stabilization delay.

2. Combustion-head tightening

-screws 1 - 2 are loosened till they

are totally free;

-screws  1 -2 are tightened at 2

daNm, then at 97

o

+/-2

o

;

Screws  no.  2 are tightened at

2.3 daNm, but nor before oiling the
threads.

-the cylinder-head cap, without tight-

ening it (in order to be able then to set/
tune the distribution);

-the pinion of the crankshaft.

-the operation of loosening and

tightening is repeated for the screw groups
3-4-5-6-, then for 7-8-9-10.

The cylinder  head is not restricted.

To be mounted subsequently:

-the rocker-arm ramp, by position-

ing marking no. 1 on the axis towards the
distribution;

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