498104 - 1028H14 Set of pistons and connecting rods - R.R. with engine and cylinder head(s) removed

Removing ( Refitting ) 1. Undo the bolts (1a) and remove the plates (1b) connecting the crankcase sump to the intermediate shaft support.2. Undo the crankcase sump front and rear bolts (2a) using the tool (2b).

	Description	Code	Function
2b	Spanner	1.860.834.000	Loosen/tighten front and rear crankcase sump bolts

3. Undo the crankcase sump side bolts (3a) using the tool (3b).

	Description	Code	Function
3b	Spanner	1.860.833.000	Loosen/tighten crankcase sump side bolts

4. Remove the crankcase sump.

To release the crankcase sump, tap it gently using a resin hammer then use a screwdriver in the special projections at the sides of the crankcase sump for leverage.

1. Undo the bolts (1a) and remove the engine oil intake duct (1b).2. Remove the O-ring.3. Fit the tool and rotate the crankshaft until the cylinder concerned is at B.D.C.

	Description	Code	Function
3	Flange	1.860.815.000	Crankshaft rotation

4. Undo the bolts (4a) and remove the connecting rod cap (4b).5. Remove the lower connecting rod half-bearing.6. Remove the connecting rod-piston assembly.7. Remove the upper connecting rod half-bearing.- Carry out the same operations to remove the pistons and connecting rods for the remaining cylinders. Refitting ( Removing ) - Rotate the crankcase through 90° on the overhaul stand.- Rotate the crankshaft using the tool fitted previously until the cylinder concerned is at B.D.C.    See in Op. 1024B10 ENGINE FLYWHEEL - R and R for versions with manual gearbox- The connecting rod half-bearings are selected as described below1. Fit the piston-connecting rod assembly (1a) complete with half-bearing using the tool (1b).

The piston-connecting rod assemblies are fitted in the crankcase so that the combustion chamber in the piston is facing the inlet side.

2. Fit the connecting rod cap (2a) complete with half-bearing and secure it without tightening the bolts (2b).

Fit the connecting rods so that the number stamped on each rod faces towardt he same side as the number stamped on the big end (inlet side).

- Carry out the same operations to refit the pistons and connecting rods for the remaining cylinders. - Rotate the crankcase through 90° on the overhaul stand.1. Tighten the connecting rod cap bolts (1a) to the recommended torque using the angular tightening tool (1b).

	Value - daNm	Fastening	Component	Ø
1a	2.0 + 60°	Bolt	CONNECTING ROD CAPS	M9

	Description	Code	Function
1b	Torque wrench	1.860.942.000	Angular tightening of bearing cap bolts

- Remove the tool.

	Description	Code	Function
.	Flange	1.860.815.000	Crankshaft rotation

- Fit the engine oil intake complete with O-Ring and secure it using the bolts.- Apply the recommended sealant to the entire perimeter of the crankcase sump.

	Description	Qty.	Component	Type	Classification
.	Dow Corning 7091	-	-	Silicone sealant	-

- Fit the crankcase sump.- Tighten the side bolts fixing the crankcase sump to the recommended torque using the tool.

	Value - daNm	Fastening	Component	Ø
.	0.9 - 1.2	Side bolts	OIL SUMP	M6

	Description	Code	Function
.	Spanner	1.860.833.000	Loosen/tighten crankcase sump side bolts

- Tighten the front and rear bolts fixing the crankcase sump to the recommended torque using the tool.

	Value - daNm	Fastening	Component	Ø
.	2.3 ÷ 3.3	Front and rear bolts	OIL SUMP	M8

	Description	Code	Function
.	Spanner	1.860.834.000	Loosen/tighten front and rear crankcase sump bolts

- Fit the plates connecting the crankcase sump to the intermediate shaft support and secure them using the bolts.