Dacia Pick-Up 1304/1305/1307. Instruction - page 18

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ENGINE AND LOWER ENGINE UNITS

Bore the guiding at the value

φ 7.

Grind the valve seat.
Perform the lapping of the valve with the valve seat.
Wash carefully the cylinder head and the component parts and blow them with air under pressure.
Mount on the cylinder head the following items:

- the cap attachment bolts;
- the valves shafts sealing rings;
- the valves(in the places where they have been removed from);
- the tilters platform;
- the water pump;
- the water pump pulley;
- the spark plugs.

Mount the cylinder head with a new gasket observing the mounting prescriptions.
Mount the acceleration cable and adjust the acceleration pedal stroke.
Perform the filling and aeration of the cooling system.
Perform the checking and adjustement of the engine running(ignition,carburation).
Retighten the cylinder head after driving 800 km.

DISMOUNTING - MOUNTING

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ENGINE AND LOWER ENGINE UNITS

VALVE SEATS GRINDING

Dismount the cylinder head from the engine.
Dismount from the cylinder head:

- the water pump;
- the valves;
- the valves shafts sealing rings;
- the tilters platform;
- the cap attachment bolts;
- the spark plugs.

Place the cylinder head on the MOT 121

support plate.

Grind the valve seat by means of the MOT

287 tool for 102 engines and with MOT 501
tool for 106 engines observing the following
order:

- grind the working part (1) by means of the 45º cutter until the surface becomes clean and

shining on the whole circumference;

- take the new or the ground valve,marked on the working surface with paint or carbon

paper and place it on the seat;

- rotate the valve,take it out and check the mark left by the valve;
- according to the mark left,the surface (2) by means of the 15

0

or surface (3) is ground by

means of the 70 º cutter until the working surface is the prescribed one
( 1,1 - 1,4 mm for inlet and 1,4 - 1,7 mm for outlet ) and the mark left on the valve is halfway the
working surface of the latter.

Perform the lapping of the valve or of the valves,then place them in order so that they can be

mounted in the place they have been taken out.

Carefully wash the cylinder head and the valves and air blow them.
Check the valves sealing by means of gasoline.
Mount the following items:

- the tilters platform;
- the cap attachment bolts;
- the valves shafts sealing rings;
- the valves;
- the water pump;
- the spark plugs.

Mount the cylinder head on the engine with a new gasket observing the mounting

prescriptions.

Mount the acceleration cable and adjust the acceleration pedal stroke.

DISMOUNTING – MOUNTING

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ENGINE AND LOWER ENGINE UNITS

Perform the filling and aeration of the cooling system.
Perform the checking and adjustment of engine operation (ignition,carburation).
Re tighten the cylinder head after driving 800 km.

ENGINE KIT REPLACEMENT ( on car )

D

ISMO UNTING

Disconnect the battery.
Drain the cooling circuit and the oil from

the engine.

Dismount:

- the tilters cap;
- the cylinder head;
- the oil sump;
- the oil pump.

Identify the connecting rods: connecting rod no. (1) is the one on the flywheel side.The marking

of the connecting rods is done on the side opposite the camshaft.

Dismount:

- the connecting rods caps;
- the bushings;
- the engine kit ( jackets – pistons – connecting rods ).

NOTE:

The caps and the bushings shall be placed in order so that they may be mounted in

the places where they have been removed from.

Clean and air blow the parts ( it is forbidden the cleaning of the aluminium parts by means of a

scrapper).

Check: - the state of the oil pump ( to be repaired or to be replaced if it is used).

- the state of the cylinder head ( grind the gasket surface,the seats,perform the lapping
of the valves if necessary ).

DISMOUNTING - MOUNTING

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ENGINE AND LOWER ENGINE UNITS

NOTE:

The parts contained in the repair

kit are in pairs ( jackets-piston-piston shaft )
according to colours.
The colour (1) marked on the piston head
must correspond to the colour marked on the
jacket.
The colour (2) marked represents the piston
weight and must be the same for all the pis-
tons.
The colour (3) marked on the piston head
must correspond to the one marked on the head
of the piston shaft.
The piston-jacket clearance 0,045 - 0,065
mm (

valid for new pistons and valves

).

The measurement of the piston is done in

the area ( see the figure) in perpendicular plane
on bolt hole axle.
The masurement of the jacket is done in two
separate sections ( see the figure) in perpen-
dicula r p la ne wit h ex terna l fla tteni ng s. Fo r
calculation of the piston – jacket clearance the
averag e dia meter ( D ) is t o b e consid ered:

D = D1 + D2

2

For the engines with the sealing of the

cylinder jackets by “ 0” ring, the checking is done
without the gasket. At these engines,the rubber
gasket is used only for sealing.
The height of the jackets over the level of the
gasket is:

0,02 - 0,09 mm

Place the jackets without gaskets in their

respective seats in the block.

Measure the height of the jackets over the

gasket level.

If the height of the jackets over the

gasket level is not within the prescribed limits,the
jacket-block assembling values are to be checked.

THE HEIGHT OF THE JACKETS OVER THE GASKET LEVEL

The checking of the jackets height over the gasket level is performed by means of the MOT

252

setting plate, the MOT 251 support and a comparison item.

zonã de

mãsurare

D2

D1

DISMOUNTING – MOUNTING

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