3025994 - 1024A10 crank shaft - r + r with engine removed - check main and connecting rod bearingand replace if necessary

Removing ( Refitting ) Proceed with the removal  - 1020D17  engind front cover - r r . 1. 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.Record the thickness of the main bearing halves.

	Measurement		Value
-	Crankshaft bearing thickness (mm)	Category B	1.839 ÷ 1.843
Category C	1.842 ÷ 1.846
Class A	1.836 ÷ 1.840

Record the thickness of the main bearing halves.

	Measurement		Value
-	Crankpin thickness (mm)	Category B	1.539 ÷ 1.543
Category C	1.542 ÷ 1.546
Class A	1.536 ÷ 1.540

Measure the clearance between main journals and bearing halves and crankpins and bearing halves using Plastic Gauge.The clearance between bearing halves and pins must be within specified values.

	Measurement		Value
-	Main journal clearance (mm)	crankshaft main journals	0.031 ÷ 0.051

	Measurement		Value
-	Big end bearing clearance (mm)	crankshaft big end bearings	0.030 ÷ 0.056

If the clearance is not within specified values, replace the main and/or connecting rod bearing halves 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 unitFit 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 bearing cap bolts to the recommended torque.

	Fastening	Component	Ø	Value(daNm)
-	-	-	-	-

Use the goniometer to angle tighten the main bearing cap bolts.

	Name	Country
-	Protractor	1.860.942.000

1. Fit the crankcase rear cover (1) incorporating the oil seal and tighten the bolts (1b) to the recommended torque.

	Fastening	Component	Ø	Value(daNm)
1b	-	-	-	-

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)
3c	-	-	-	-

Use the goniometer for angle tightening the big end bearing 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	-	-	-	-

Remove the tool.

	Name	Country
-	Counter-torque	1.820.624.000

Proceed with the refitting  - 1020D17  engind front cover - r r .