CITROEN SM Gebrauchsanweisung

AUTOMOBILES

C I T R O E N

AFTER-SALES TECHNICAL DIVISION

The enclosed schedule deals with particular points concerning

the overhauling of a MASERATI engine in an SM vehicle.

These particular points are taken from ORKSHOP MANUAL 581-3.

INFORMATION

BULLETIN

N° 1 S

20th April 1972

CONFIDENTIAL

SM VEHICLES

(SB series SB)

This schedule contains 29 cards which can be used as " workshop

index cards

These may be protected with plastic sleeves.

Place the cards in the proximity of the work-bench where the

overhaul of components is carried out so that the mechanic can use

them for reference. ENGINE

OVERHAULING

THE

ENGINE

SM VEHICLES OVERHAULING THE 'ENGINE S 1 -3 1

DISMANTLING PARTICULAR POINTS ON DISMANTLING AND ASSEMBLY

Raise the engine using the lifting attachments

Remove :

- The engine mountings

- The starter motor

Use the sling 251 7-T

Fix the engine on the dismantling support

Stand 2509-T

Adaptor 2512-T

Remove

- The air fi Iter

- The circ Iips(3) of the accelerator control

knuckle

- The air-intake horns

- The base of the filter (1)

- The carburettor/manifold assembly (screw 2)

REMOVE THE OIL FILTER

Strap wrench | Spanner

e.g. FACOM D.46 ! MR„ 630-14/49

2 SM VEHICLES OVERHAULING THE ENGINE

DISMANTLING Contd.

Remove the mechanism and the clutch disc

Remove the fly-wheel

Tool E from the set 3064-T

/f**

Remove the manifold

- Collar (1)

- Screw (2)

REMOVING THE CYLINDER-HEADS

Turn the engine to bring the spring links to the top

Loosen the chains by slackening the nuts (1)

Remove the spring links

Disengage the chains from the "exhaust"

camshaft pinions.

SM VEHICLES OVERHAULING THE ENGINE S 1 -3

DISMANTLING Contd. PARTICULAR POINTS ON DISMANTLING AND ASSEMBLY

7 Contd.

- Remove the screw at position "a

- Swivel the tensioner towards the bottom.

- Disengage the screw (1) of the tensioner.

- Remove the chain tensioner

- Remove the cylinder heads (screws 2)

- Remove the water pump cover

(screw 1)

B Contd.

Removing the water pump

- Unlock the nut (2) and remove it.

- Remove the turbine (be careful

with the cotter). - Remove the sealing ring of the pump

shafts

4 SM VEHICLES OVERHAULING THE ENGINE S 100-3

DISMANTLING Contd.

Remove the oil sump

- Remove the oil pump filter

Remove the timing case

- Disengage the chain tensioner :

Using a screwdriver apply pressure

to the lug (1) and turn the spindle (2)

a quarter of a turn.

- Remove the chain guide and the tensioner

(take care with the flat washers between

the tensioner and the housing).

SM VEHICLES OVERHAULING THE ENGINE S 1 -3 5

DISMANTLING Contd. PARTICULAR POINTS ON DISMANTLING AND ASSEMBLY

13 REMOVING THE INTERMEDIATE TIMING SHAFT

Remove the driving flange from the H.P.

pump control shaft.

Disengage the intermediate timing s.iaft

1 3 Contd.

- Disengage the timing chain between

the housing and the pinion,

- Remove the intermediate timing shaft.

- Disengage the chain

- Remove the sealing ring (1)

(extractor tube c/j = 39 mm, length = 400mm)

Remove the lower housing and its gasket.

N„B„ : This housing is held by

8 dowel s

6 SM VEHICLES OVERHAULING THE ENGINE S 1 -3

DISMANTLING Contd.

i J - Remove the con rod caps (socket of 14 mm

and adaptor of 3/8"). Remove the

crankshaft

Remove the

con rod pi ston

assembl ies

^ ^ - Remove :

- The crankshaft bearing shells

- The end float adjusting shims.

Contd.

CLEANING

Carefully clean all the parts and the joint surfaces.

Blow with compressed air.

NOTE : Alcohol should be used to remove CURTYLON.

SM VEHICLES OVERHAULING THE ENGINE S 100-3 7

DISMANTLING Contd. PARTICULAR POINTS ON DISMANTLING AND ASSEMBLY

17 ORK ON THE CON ROD PISTON ASSEMBLIES

Remove the rings | Remove the gudgeon pin

i Tool G from the set 3064 - T

18 STRIPPING THE CYLINDER- HEADS

Remove : I Remove the valve push rods and the capsules

, I for adjusting the clearance.,,, marking their

- I he sparking plugs I

I respective positions*

8 SM VEHICLES OVERHAULING THE ENGINE S 1 -3

DISMANTLING Contd.

i 3 Contd.

Remove the free-play limiter of the chain.

Contd.

Grind the seatings and the valves (grindstone

1 630-T)

idth of the bearing faces of the seatings

In let : 2,5 mm

Outlet : 2S2 mm - Grind the va Ives

in.

After grinding in,

clean the parts

carefully and blow

them with compres

sed air in order to

eliminate all trace

of abrasive

materials.

Stripping the timing case

Remove ;

- The oi I pump

- The gasket (1) (tube spanner c/> : 33 mm

length : 1 00mm)

- The accelerator control return lever (4)

- The plug (2)

- The union (3) and the by-pass valve

(if necessary).

Remove the valves

(universal compressor and tool D from

the set 3064-T)

SM VEHICLE OVERHAULING AN ENGINE S 1 -3 9

ASSEMBLY PARTICULAR POINTS ON DISMANTLING AND ASSEMBLY

IMPORTANT NOTES

GASKETS

ALL gaskets must be systematically renewed

All gaskets should be fitted greased with tallow

(except the REINZ cylind er-head gaskets which must

be fitted dry).

TIGHTENING TORQUES

On this engine, all tightening torques MUST

be respected.

Failure to do this results in deformation which

adversely affects the correct running of the engine.

NOTE : Nuts and bolts must be fitted with

their threads oiled.

Check how far the barrels are recessed.

1) In relation to the joint face of the cylinder casing

0.02 - 0.05 mm.

2) Amongst themselves, the barrels should be

in the same plane to within : 0.02 mm.

Straight edge 1698-T + foil. Correct if

necessary with tool A from set 3064 - T

20 PREPARING THE PISTON/CON ROD ASSEMBLIES

hen assembling the pistons and con rods, the chamfer C should be on the same side as the longer

slope L.

- Heat the con rod to 200° - 250°C (392-482° F) (oven).

- Position the con rod in the piston (guide of assembly G of set 3064-T)

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