Dacia Solenza (engine E7J). Service manual — part 13
ENGINE
E7J-262
10
ENGINE ASSEMBLY
10 - 27
CYLINDERS BLOCK DISMOUNTING
Dismount:
- water inlet pipe and oil dipper rod
guide ( their sealing is performed by means of
rubber rings that must be replaced at each dis-
mounting);
- clutch;
- engine flywheel, immobilized by means
of the MOT 582;
- lower crankcase;
- crankshaft gear;
- tightening roller;
- crankshaft closing casing;
Dismounting – Remounting
-
water pump.
Dismount the oil pump attachment screws.
Dismount the oil pump and its driving chain.
Mark the connecting rod caps compared
with the connecting rod body.
ATTENTION!
Do not use punches for marking in or-
der to avoid cracks occurring; a perma-
nent marker is to be used.
Dismount
- connecting rods caps and the bearings;
- jackets maintaining device MOT 484 or
clamps MOT 588;
- assembly jackets-pistons-connecting
rods;
- bearings caps and their bearings;
- crankshaft and axial clearance bearings;
- bearings from the cylinders block.
PISTONS SHAFTS DI
SMOUNTING
Place the piston on the support lining up
the piston bolt (shaft) with the gap whole from
the support (two T lines for marking the whole
center are facilitating the lining up).
Remove the bolts using a press by means
of the extraction mandrel E.
ENGINE E7J-262
10
ENGINE ASSEMBLY
10 - 28
CYLINDERS BLOCK
REMOUNTING
Clean the cylinders block, especially the
jackets seating and sealing surfaces.
Preparation of assembly
“ pistons-jackets”
The parts contained in the kit are in pairs.
Mark the parts assembly from A to D in
order to keep the matching.
Dismounting – Remounting
Remove completely the anti-rust foil.
REMARK:
Never scrape the parts.
Jackets over-height
These engines are equipped with rubber
rings for jackets sealing, ensuring only the seal-
ing, jackets being seated directly on the cylin-
ders block and over-height being done from
manufacturing.
The checking of the jackets over-height is
to be performed as follows:
- place the jackets in the cylinders block
without the sealing ring;
- check the X over-height by means of
the devices MOT 251-01 and MOT 252-01.
ENGINE
E7J-262
10
ENGINE ASSEMBLY
10 - 29
Dismounting – Remounting
The over-height X must be between 0.02
mm and 0.09 mm.
Place the jackets in such way that :
- the difference between two joint jackets
to be maximum 0.05 mm;
- the over-height to be in ascending order
between cylinders 1 and 4;
- in case of an incorrect over-height, check
the over-height by means of a new kit of jack-
ets, in order to see if the cause is the block or
the cylinders jacket or check the theoretical size
values of the block and of the jackets.
When over-height is correctly obtained, per-
form the A, B, C, D assembly then mark with
numbers jackets, pistons and the bolts from 1
to 4 (no.1 towards flywheel) so that the corre-
spondence with the corresponding connecting
rods may be achieved.
Pistons bolts mounting
The pistons bolts are fixed in connecting rods
and free in pistons.
Mount the pistons bolts by means of the
MOT 574-22 that is containing:
- a support for piston (S);
- an extracting mandrel (M);
- the piston supporting bushings (B);
- the bolts for mounting (A) provided with
their centering guides (C).
Use an electric plate of 1500 W (electric
oven) for connecting rods heating.
Place the connecting rods on the electric
plate so that connecting rod end surfaces are
in contact with the heating plate.
Check if the pistons bolts are freely gliding
in the new corresponding pistons.
Mount the piston bolt E on the mounting
bolt A.
Screw the centering guide C till end and
then unscrew it for a quarter of turn.
ENGINE E7J-262
10
ENGINE ASSEMBLY
10 - 30
The arrow marked on the piston head must
be oriented towards engine flywheel.
The connecting rods have no mounting
direction, but the half-bearings spurs are to
be positioned on the same part.
In order to assemble the piston and the
connecting rod, proceed as follows:
- place the bushing B 13 on the support
and attach the piston (with the arrow oriented
upwards) on the bushing;
Dismounting – Remounting
- lubricate the centering guide and the
piston bolt with engine oil;
- check the free gliding of the piston
bolt and the piston positioning.
When the connecting rod end is reaching
the necessary temperature (about 250 °C),
proceed to the rapid of the piston bolt, as
follows:
- introduce the centering guide in the
piston;
- position the connecting rod in the
piston;
- press till end the piston bold.
Check if the piston bolt is remaining re-
tired as against the piston outer diameter for
each of the connecting rod position in the pis-
ton.
Rings mounting
Mount the rings on the piston in the
following sequence:
- oiling ring (3);
- sealing ring (2) with the mark “TOP”
upwards;
- compression ring (1) with the mark
“TOP” upward.
The compression and sealing rings are to be
mounted with the slots disposed at 90° against
de bolt’s axle and displaced between them with
180°. The oiling ring is to be mounted with the
slot oriented at 45° against the bolt’s axle.
The rings slots being adjusted, shall never be
reworked.
Lubricate the pistons with engine oil.
Mount the assemblies “connecting rod-
piston-rings” in the cylinder’s jackets, by means
of the mounting bushing.
Mount the sealing gaskets on the cylinder
jackets.
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