1028H34 PISTON/CYLINDER LINER SET - R R - Alfa - 156 - eLearn

3239076 - 1028h34 piston/cylinder liner set - r r

) Rotate the engine through 180° on the overhauling stand.1. Undo the bolts (1a) and remove the oil sump (1b) complete with fixed single drive belt tensioner (1c) and rpm and timing sensor (1d).

To release the sump, tap it gently with a wooden or resin hammer, then use a screwdriver to lever against the specific projections on the sides of the sump.

1. Fit the tool.

	Name	Country
1	Flange	1.860.815.000

Turn the crankshaft to gain access to the big end bearing cap bolts on the right bank.2. Undo the bolts (2a) and remove the big end bearing caps (2b) complete with bearing shells (2c) from the right bank.

Rotate the engine through 180° on the overhauling stand.1. Remove the tools from the right bank.

	Name	Country
1	Liner/bore holder	1.820.279.000

2. Remove the cylinder liners (2a), the connecting rod-piston assemblies (2b) and the big end bearings (2c) from the right bank.Separate the connecting rod-piston assemblies from their cylinder liners.Do the same to remove the cylinder liners and connecting rod-piston assemblies of the left bank.

Refitting ( Removing

) Fit the cylinder liners complete with compression rings in the cylinder block and lock them with the tool, tightening the nuts to torque.

	Name	Country
-	Liner/bore holder	1.820.279.000

1. Measure the projection of the cylinder liners from the cylinder block surface using tool (1a) fitted with a dial gauge (1b) and check that it is within the specified values.

	Measurement		Value
-	Projection from cylinder block surface (mm)		0.01 - 0.06

	Name	Country
1a	Dial gauge mounting	1.825.003.000

Fit the connecting rod-piston assemblies complete with big end bearings in their cylinder liners using a suitable tool.

The pistons are fitted with the arrow stamped on the crown facing the front of the engine.

Rotate the cylinder block 180° on the overhaul stand.Fit the tool.

	Name	Country
-	Flange	1.860.815.000

Turn the crankshaft as necessary and fit the big end bearing caps complete with bearing shells and tighten the nuts to torque.

The big end bearing caps have the number of the cylinder to which they belong on one side: when refitting, this number should be on the same side as the one on the small end.

	Fastening	Component	Ø	Value(daNm)
-	Bolt	BIG END BEARING CAPS	M9	1.9 ÷ 2.1 + 48? ÷ 52?

Use the special tool for the angular tightening of the connecting rod cap bolts.

	Name	Country
-	Protractor	1.860.942.000

Remove the tool.

	Name	Country
-	Flange	1.860.815.000

Apply the recommended sealant to the entire perimeter of the crankcase sump.

	Type	Component	Name	Qty.
-	Sealant	OIL SUMP	LOCTITE 5900	-

Fit the oil sump complete with rpm and timing sensor and drive belt fixed tensioner.Tighten the oil sump bolts to torque.

	Fastening	Component	Ø	Value(daNm)
-	Bolt	OIL SUMP	M7	1.3 ÷ 1.6