1028H14 PISTON CONNECTING ROD SET - R R - Alfa - 156 - eLearn

3239091 - 1028h14 piston connecting rod set - r r

) Rotate the engine through 180° on the overhauling stand.1. Undo and remove the engine oil level sensor.2. Undo the bolts (2a) using tool (2b).

	Name	Country
2b	Spanner	1.860.833.001

	Name	Country
2b	Spanner	1.860.834.001

3. Using a special tool (3a) cut the bead of sealant for the enigne oil sump (3b), then remove it.

	Name	Country
3a	Blade	1.870.718.000

1. Undo the fixing nuts and bolts (1a) and remove the engine oil intake chamber (1b).

1. Fit the tool and rotate the crankshaft until the cylinder concerned is at B.D.C.

	Name	Country
3	Flange	1.860.815.000

2. Undo the bolts (2a) and remove the big end bearing cap (2b).3. Remove the lower big end bearing shell.4. Remove the connecting rod - piston assembly.5. Remove the upper big end bearing shell.Proceed in the same way with the removal of the pistons and connecting rods for the remaining cylinders.

Refitting ( Removing

) Rotate the cylinder block through 90° on the overhauling stand.Rotate the crankshaft using the tool fitted previously until the cylinder concerned is at B.D.C.

	Name	Country
-	Flange	1.860.815.000

Select the connecting rod bearing halves as described under - 1024A10 crank shaft - r + r with engine removed - check main and connecting rod bearingand replace if necessary . 1. Fit the piston - connecting rod assembly (1a), complete with half-bearing, using the tool (1b).

The connecting rod - piston assemblies are fitted in the cylinder block/crankcase with the combustion chamber in the piston facing the inlet side.

2. Fit the big end bearing cap (2a) complete with half-bearing and fix it using the bolts (2b) without tightening them.

The connecting rod caps are fitted so that the number stamped on them is facing the same side as the one stamped on the big end (inlet side).

Work in the same way when refitting the pistons and connecting rods for the remaining cylinders.

Rotate the cylinder block through 90° on the overhauling stand.1. Tighten the bearing cap bolts (1a) to the recommended torque; use the tool (1b) for the angular tightening.

	Fastening	Component	Ø	Value(daNm)
1a	Bolt	BIG END BEARING CAPS	M9	2.0 + 60°

	Name	Country
1b	Protractor	1.860.942.000

Remove the tool.

	Name	Country
-	Flange	1.860.815.000

Fit the engine oil inlet complete with O-ring and fix it using the bolts and nut.Apply the recommended sealant to the entire perimeter of the crankcase sump.

	Type	Component	Name	Qty.
-	Silicon sealant	OIL SUMP	Dow Corning 7091	-

Fit the crankcase sump.Tighten the side bolts for the crankcase sump to torque using the tool.

	Fastening	Component	Ø	Value(daNm)
-	Side bolt	OIL SUMP	M6	(Engine block side) 0.9 ÷ 1.2

	Name	Country
-	Spanner	1.860.834.001

Tighten the front and rear bolts for the crankcase sump to torque using the special tool.

	Fastening	Component	Ø	Value(daNm)
-	Front and rear bolt	OIL SUMP	M8	(Engine crankcase side) 2.3 ÷ 3.3

	Name	Country
-	Spanner	1.860.833.001

Fit the engine oil level sensor in its seat.