1024A10 CRANKSHAFT - R.R. WITH ENGINE REMOVED - CHECK AND, IF NECESSARY, REPLACE CRANKSHAFT BEARINGS AND CRANKPINS - Lancia - THESIS - eLearn

727097 - 1024A10 Crankshaft - R.R. with engine removed - Check and, if necessary, replace crankshaft bearings and crankpins

) See in Op. 1020D17 Crankshaft oil seal front cover - R.R. and Replace seals for engines with oil pump on timing side crankshaft and heat exchanger - with engine removed1. Fit the tool.

	Description	Code	Function
1	Counter-torque	1.860.846.000	Flywheel lock

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

	Description	Code	Function
.	Counter-torque	1.860.846.000	Flywheel lock

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

	Description	Code	Function
4	Flange	1.860.815.000	Crankshaft rotation

- Rotate the crankshaft using the tool fitted previously until the cylinder concerned is at B.D.C.1. Undo the bolts (1a) and remove the connecting rod cap (1b).2. Remove the lower connecting rod half-bearing.- Carry out the same operations to remove the connecting rod caps and half-bearings for the remaining cylinders.3. Undo the bolts (3a) and remove the connecting rod caps (2b).4. Remove the lower main journal half-bearings.5. Remove the crankshaft.6. Remove the upper connecting rod half-bearings.7. Remove the upper main journal half-bearings.8. Remove the thrust washers from the 4th main journal.

Refitting ( Removing

) - Visually inspect the condition of the main journal and crankpin half-bearings and replace them if necessary.- The size of the main journal half-bearings is given.

	Subject	Value
.	Main bearing half thickness	mm
-	Category A	1.831 ÷ 1.837
-	Category B	1.836 ÷ 1.844
-	Category C	1.843 ÷ 1.849

- The size of the connecting rod half-bearings is given.

	Subject	Value
.	Connecting rod bearing half thickness
-	Category A	1.527 ÷ 1.531
-	Category B	1.530 ÷ 1.534
-	Category C	1.533 ÷ 1.537

- Measure the clearances between the main journals and the half-bearings and the crankpins and the half-bearings using the plastic gauge.- The clearance between the half-bearings and the journals should correspond to the recommended figures.

	Subject	Value
.	Main bearing clearance	mm
-	crankshaft main journals	0.031 ÷ 0.051

	Subject	Value
.	Crankpin clearance	mm
-	Crankshaft crankpins	0.030 ÷ 0.056

See in Op. 1004E20 Engine - Dismantling and Reassembly following Op. [OP_1044E10] - Washing and checking dismantled components - Refitting cylinder head and oil sump - Does not include operations on the cylinder head and auxiliary unit- If the clearance does not correspond to the recommended values, replace the main journal and/or crankshaft half-bearings following the instructions- Fit the upper main journal half-bearings in the cylinder block/crankcase.- Fit the upper connecting rod half-bearings on the big end.- Fit the crankshaft in the crankcase.- Fit the thrust washers on the 4th main journal.1. Fit the main bearing caps.

The main bearing caps have progressive references (from zero to five starting from the front of the engine) which define their fitting position.

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

	Value - daNm	Fastening	Component	Ø
1a	(engine crankcase side) 2.0 + 100°	Bolt	MAIN BEARING CAPS	M12

	Description	Code	Function
1b	Torque wrench	1.860.942.000	Angular tightening of bearing cap bolts

- Rotate the crankshaft using the tool fitted previously until the cylinder concerned is at B.D.C.- Fit the connecting rod cap complete with half-bearing and secure it without tightening the bolts.

Fit the connecting rods so that the number stamped on each rod faces towards he same side as the number stamped on the big end (inlet side).

- Carry out the same operations to refit connecting rod caps for the remaining cylinders.1. Tighten the connecting rod cap bolts (1a) to the recommended torque using the angular tightening tool (1b).

	Value - daNm	Fastening	Component	Ø
1a	2.0 + 60°	Bolt	CONNECTING ROD CAPS	M9

	Description	Code	Function
1b	Torque wrench	1.860.942.000	Angular tightening of bearing cap bolts

- Remove the tool.

	Description	Code	Function
.	Flange	1.860.815.000	Crankshaft rotation

1. Fit the crankcase rear cover (1a) with the oil seal incorporated using a suitable tool.2. Tighten the crankcase rear cover bolts to the recommended torque.

	Value - daNm	Fastening	Component	Ø
2	(engine crankcase side) 0.9 - 1.2	Bolt	CRANKSHAFT REAR COVER	M6

- Remove the tool (1b).

- Fit the tool.

	Description	Code	Function
.	Counter-torque	1.860.846.000	Flywheel lock

- Fit the flywheel and tighten the bolts to the recommended torque.

	Value - daNm	Fastening	Component	Ø
.	14.7 - 21.2	Bolt	FLYWHEEL (MECH.)	M12

- Remove the tool.

	Description	Code	Function
.	Counter-torque	1.860.846.000	Flywheel lock

See in Op. 1020D17 Crankshaft oil seal front cover - R.R. and Replace seals for engines with oil pump on timing side crankshaft and heat exchanger - with engine removed- Proceed with the refitting.