3239074 - 1024A10 crank shaft - r + r with engine removed - check main and connecting rod bearingand replace if necessary

Removing ( Refitting )  - 1020D17  engind front cover - r r1. Fit the tool.

	Name	Country
1	Counter-torque	1.820.624.000

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

	Name	Country
-	Counter-torque	1.820.624.000

3. Undo the bolts (3a) and remove the crankcase rear cover (3b) integrated with the oil seal.4. Fit the tool.

	Name	Country
4	Flange	1.820.618.000

Rotate the crankshaft using the tool fitted previously until the pistons of cylinders no. 1 and no. 4 are at B.D.C.

To facilitate crankshaft rotation, remove one spark plug for each cylinder.

5. Undo the bolts (5a) and remove the big end bearing caps (5b) with the bearing shells (5c) of cylinders no. 1 and no. 4. Do the same to remove the big end bearing caps of cylinders no. 2 and no. 3. 1. Remove the tool.

	Name	Country
1	Flange	1.820.618.000

2. Undo the bolts (2a) and remove the main bearing caps (2b) complete with bearing shells (2c).3. Remove the crankshaft.4. Remove the half-bearings.5. Remove the thrust washers.6. Remove the big end bearing shells. Refitting ( Removing ) Visually inspect the condition of the main and big end bearing shells and, if necessary, replace them. Measure the clearance between main journals and half bearings and connecting rod pins and bearing halves using Plastic Gauge.The clearance between bearing halves and journals must be within specified limits.

	Measurement		Value
-	Clearance between crankshaft bearings - main journals (mm)		0.025 ÷ 0.052

	Measurement		Value
-	Big end bearing - crankpin play (mm)		0.025 ÷ 0.052

If the clearance is not within specified limits, replace the main bearings and/or connecting rod bearings as indicated in  - 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 . Fit the big end bearing shells.Fit the main bearing shells.Fit the crankshaft on the cylinder block/crankcase.Fit the thrust washers on the 3rd main bearing.Fit the main journal caps complete with half-bearings.

The bearing caps are numbered progressively (from zero to four starting from the front of the engine) which defines their fitting position.

Tighten the main bearing cap bolts to torque.

	Fastening	Component	Ø	Value(daNm)
-	Bolt	MAIN BEARING CAPS	M12	2.4 ÷ 2.6 + 100?

Use the tool for angular tightening of the main bearing cap bolts.

	Name	Country
-	Protractor	1.860.942.000

1. Fit the crankcase rear cover (1a) with the oil seal integrated using the tool (1b).

	Name	Country
1b	Fitting tool	1.820.619.000

2. Tighten the bolts securing the cylinder block rear cover with integrated oil seal to torque.

	Fastening	Component	Ø	Value(daNm)
2	Bolt	FLYWHEEL SIDE COVER	M6	0.8 - 1.0

Remove the tool.

	Name	Country
-	Fitting tool	1.820.619.000

Fit the tool.

	Name	Country
-	Flange	1.820.618.000

Rotate the crankshaft until cylinders no. 1 and no. 4 are at B.D.C.3. Fit the big end bearing caps (3a) complete with bearing shells (3b) and tighten the bolts (3c) to torque.

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.

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

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

	Name	Country
-	Protractor	1.860.942.000

4. Fit the tool.

	Name	Country
4	Counter-torque	1.820.624.000

5. Fit the flywheel (5a) and tighten the bolts (5b) to torque.

	Fastening	Component	Ø	Value(daNm)
5b	-	FLYWHEEL	M12	12.1 - 14.9

Remove the tool.

	Name	Country
-	Counter-torque	1.820.624.000

 - 1020D17  engind front cover - r r