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

3239091 - 1028h14 piston connecting rod set - r r

) 1. Fit the flywheel lock.

	Name	Country
1	Counter-torque	1.860.846.001

2. Undo the bolts (2a) and remove the engine flywheel (2b).

The engine flywheel retaining bolts are treated with a compound to prevent them coming undone they should therefore be replaced whenever they are removed.

Remove the flywheel lock.

	Name	Country
-	Counter-torque	1.860.846.001

1. Undo the bolts (1a) and remove the engine flywheel protection (1b).

1. Undo the front and rear bolts (1a) securing the crankcase sump using tool (1b).

	Name	Country
1b	Spanner	1.860.833.001

2. Undo the side bolts (2a) securing the crankcase sump using tool (2b).

	Name	Country
2b	Spanner	1.860.834.001

3. Use the tool to cut the crankcase sump sealant.

	Name	Country
3	Blade	1.870.718.000

4. Remove the crankcase sump.

1. Undo the bolts (1a) and remove the engine oil inlet (1b).2. Remove the gasket.

1. Fit the tool.

	Name	Country
1	Flange	1.820.618.000

Rotate the crankshaft using the tool fitted previously until the cylinder concerned is at B.D.C.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

) 1. Refit the piston - connecting rod assembly (1a), complete with half-bearing, using the tool (1b).

To select the connecting rod half-bearings, follow the procedure described previously for the main journal half-bearings - 1004E20 engine - dismantle and re-build following operation 1004e10 - wash and check dismantled parts - re-fit cylinder head and oil sump - does not include repairs to cylinder head and auxiliary unit .

The piston - connecting rod assemblies are fitted in the cylinder block/crankcase so that the drain on the piston skirt is in line with the oil jet fitted on the cylinder block/crankcase.

Proceed in the same way with the refitting of the pistons and connecting rods for the remaining cylinders.

1. Check the clearance of the connecting rod bearings, using the calibrated wire (Plastigage).

Place the big end caps complete with half-bearings back in their housings.

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).

1. Tighten bolts (1a) to the recommended torque using angular tightening tool (1b).

	Fastening	Component	Ø	Value(daNm)
1a	Bolt	BIG END BEARING CAPS	M9	2.4 ÷ 2.6 + 60?

	Name	Country
1b	Protractor	1.860.942.000

Undo the nuts and remove the connecting rod caps complete with half-bearings fitted previously.1. Using a suitable graduate measuring instrument (1a), measure the clearance shown by the calibrated wire (1b).

	Measurement		Value
1b	Clearance between big end bearings-Crankpins (mm)		0.016 ÷ 0.070

If the value measured does not correspond to the recommended figures, replace the connecting rod bearings.Carry out this check on all the connecting rod bearings, one at a time, without rotating the crankshaft.Place the connecting rod cap, complete with half-bearing, back in its housing and fix it using the bolts 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).

1. Tighten the bolts (1a) for the connecting rod caps to the recommended torque, using the angular tightening tool (1b).

	Fastening	Component	Ø	Value(daNm)
1a	Bolt	BIG END BEARING CAPS	M9	2.4 ÷ 2.6 + 60?

	Name	Country
1b	Protractor	1.860.942.000

Remove the tool.

	Name	Country
-	Flange	1.820.618.000

Place the engine oil intake, complete with gasket, back in its housing and secure it using the bolts.Apply silicon sealant around the edge of the crankcase sump.1. Refit the crankcase sump2. Tighten the side bolts (2a) for the crankcase sump to the recommended torque using the tool (2b).

	Fastening	Component	Ø	Value(daNm)
2a	Side bolts	OIL SUMP	M8

	Name	Country
2b	Spanner	1.860.833.001

3. Tighten the front and rear bolts (3a) for the crankcase sump to the recommended torque using the tool (3b).

	Fastening	Component	Ø	Value(daNm)
3a	Front and rear bolt	OIL SUMP	M6	(Crankcase front/rear covers side) 0.7 ÷ 0.9

	Name	Country
3b	Spanner	1.860.834.001

Place the engine flywheel protection back in its housing and secure it using the bolts.1. Fit the flywheel lock.

	Name	Country
1	Counter-torque	1.860.846.001

2. Refit the engine flywheel (2a) and secure by tightening new sealant-treated bolts (2b) to the recommended torque.

	Fastening	Component	Ø	Value(daNm)
2b	Bolt	FLYWHEEL	M12	(Crankshaft side) 14.4 ÷ 17.6

Use the tool for angular tightening of the engine flywheelbolts.

	Name	Country
-	Protractor	1.860.942.000

Remove the flywheel lock.

	Name	Country
-	Counter-torque	1.860.846.001