1024A10 CRANK SHAFT - R + R WITH ENGINE REMOVED - CHECK MAIN AND CONNECTING ROD BEARINGAND REPLACE IF NECESSARY - Fiat - STILO - eLearn

3363560 - 1024A10 crank shaft - r + r with engine removed - check main and connecting rod bearingand replace if necessary

) - 1004D40 engine - position on stand and remove - 1004E10 engine, removed - remove cylinder head and oil sump for inspection - includes positioning on stand and removal1. Position the flywheel retainer.

	Name	Country
1a	Counter-torque	1.860.846.000

2. Undo the fixing bolts (2a) and remove the clutch plate (2b).

1. Undo the bolts (1a) and the nut (1b) and remove the water pump (1c).2. Undo bolts securing crankcase gear and remove,

1. Unscrew the bolts securing the flywheel.2. Remove the engine flywheel together with plate (2a) and the flywheel lock positioned previously.

1. Undo the fixing bolts (1a) and remove the crankshaft rear cover (1b).

1. Undo the bolts (1a) and the nut (1b) and remove the water pump (1c).

1. Undo the bolts (1a) and remove the crankcase front cover (1b) with built in oil pump (1b), complete with crankshaft front oilseal (1c), oil pump (1d) and oil filter (1e).2. Remove the gasket from the crankcase front cover

1. Using the service bolts (1a), fit the tool for rotating the crankshaft.

	Name	Country
1a	Flange	1.860.815.000

Rotate the crankshaft using the tool fitted previously until cylinders no. 1 and no. 4 are at T.D.C1. Undo the bolts (1a) and remove the connecting rod caps (1b) for cylinders 1 and 4.2. Remove the lower connecting rod half bearings for cylinders no. 1 and no. 4.3. Remove the connecting rod-piston assemblies for cylinders 1 and 4.4. Remove the upper connecting rod half bearings for cylinders 1 and 4.Proceed in the same way to remove the pistons and connecting rods for cylinders 2 and 3.Remove the tool for rotating the crankshaft.

	Name	Country
-	Flange	1.860.815.000

1. Check using a dial guage with a suitable magnetic base that the crankshaft end float is within the recommended values

	Measurement		Value
1	End float (mm)		0.055 ÷ 0.265

If the end float of the crankshaft is not within the recommended value, when refitting, reface the seats in the crankcase and use suitable 0.127 mm oversize thrust washers (secured to the central main bearing halves)1. Undo bolts (1a) and (1b) and remove the lower crankcase, which also acts as the main bearing caps.2. Remove the lower main journal half-bearings.3. Remove the crankshaft.4. Remove the upper main journal half-bearings.

The central main bearing halves incorporate crankshaft thrust half-rings.

Refitting ( Removing

) Using compressed air gun, clean the oil ports in the crankshaft.Check the static balance of the crankshaft resting the main journals on suitable parallel bars.Check that the diameter of the main journals is within the recommended values.

	Measurement		Value
-	Cylinder bore diameter (mm)	Category B	82.010 - 82.020
Category C	82.020 - 82.030
Class A	82.000 - 82.010

If the diameter of the main journals is not within the recommended values, regrind them in accordance with the recommended undersize.

The shaft has undergone a nitriding treatment; therefore if it needs regrinding it should undergo the nitriding treatment again and the dimensions should then be checked.

	Measurement		Value
-	Crankpin undersize (mm)		0.254 / 0.508

Check that the diameter of the crankpins is within the recommended values.

	Measurement		Value
-	Crankpin diameter (mm)		41.990 ÷ 42.008

If the diameter of the crankpins is not within the recommended values, regrind them in accordance with the recommended undersize.

The shaft has undergone a nitriding treatment; therefore if it needs regrinding it should undergo the nitriding treatment again and the dimensions should then be checked.

	Measurement		Value
-	Crankpin undersize (mm)		0.254 - 0.508

Check the crankshaft bearings, taking into account that no adjustment operations should be carried out on half-bearings. If there are signs of grooves or seizing, they must be replaced.Fit the upper main journal half-bearings in the upper cylinder block/crankcase. Ensure lubrication holes are aligned and maintain scrupulous cleanliness. The central main bearing halves contain built-in thrust half-rings because they peform a load-bearing/thrust function.If the crankshaft has been reground, fit the new and oversize half-bearings to restore the original tolerance conditions.1. Fit the crankshaft in the housing in the upper cylinder block/crankcase.2. Fit the calibrated wire (Plastigage) to measure the main journal clearance.

1. Position the main bearing halves to the lower crankcase.2. Fit the lower crankcase to the upper crankcase. check that codes (2a) stamped on both parts of the crankcase correspond because the crankcase components are not interchangeable.

1. Tighten bolts (1a) and bolts (1b) securing the lower crankcase. Use tool (1c) to for angular tightening.

	Name	Country
1c	Protractor	1.860.942.000

1. Remove the lower crankcase and check main journal clearance. Measure calibrated wire width using an appropriate gauge.

Check one pin at a time without turning the crankshaft.

	Measurement		Value
-	Clearance between crankshaft bearings and main journals (mm)		0.025 ÷ 0.040

After checking all the main journals, apply sealant to the mating surface between lower and upper crankcase. Then fit the lower crankcase by tightening the bolts to torque in the order shown previously.

Apply a 2 mm thick, unbroken sealant strip to the lower crankcase surface.

	Type	Component	Name	Qty.
-	Silicon sealant	LOWER CRANKCASE	LOCTITE 5900	2 mm

Positin the tool for rotating the crankshaft.

	Name	Country
-	Flange	1.860.815.000

Rotate the crankshaft using the tool fitted previously.The connecting rod-piston assemblies are fitted with the references in the following positions.1. Piston grade and arrow indicating the timing side.2. Area where number of cylinder bore/liner to which the connecting rod belongs is stamped.3. Connecting rod pin offset.

The letters for the cylinder bore/liner class are located on the cylinder block/crankcase.

1. Fit the connecting rod-piston assemblies (1a), complete with half-bearings, using the tool (1b) for compressing the piston rings and later introducing the piston in the liner/bore.

	Name	Country
1b	Fitting tool	1.860.700.000

Rotate the engine on the overhauling stand.1. Apply calibrated wire (plastigage) to measure crankpin backlash.

1. Fit the connecting rod caps (1a), complete with half-bearings (1b), and fix them tightening the bolts (1c) to the recommended torque using tool (1d) for the angular tightening.

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).

	Fastening	Component	Ø	Value(daNm)
1c	Bolt	CONNECTING ROD CAP FASTENERS	M8	2 + 40°

	Name	Country
1d	Protractor	1.860.942.000

1. Remove the main bearing caps and measure journal backlash by recording calibrated wire width using a graduated measuring device.

Check the one connecting rod pin at a time without rotating the crankshaft.

	Measurement		Value
-	Big end bearings (mm)		0.024 - 0.060

If the value measured does not correspond to the recommended figures, replace the connecting rod bearings.Fit the connecting rod caps complete with half bearings and tighten the bolts to the specified torque.Remove the tool for rotating the crankshaft.

	Name	Country
-	Flange	1.860.815.000

Rotate the engine on the overhauling stand.1. Position a new oil pump gasket.2. Fit the crankcase front cover (2a) with built-in oil pump, complete with inlet, and tighten the bolts (2b) to the recommended torque.

	Fastening	Component	Ø	Value(daNm)
2b	Bolt	ENGINE OIL PUMP	M6 x 20	1

	Fastening	Component	Ø	Value(daNm)
2b	Bolt	ENGINE OIL PUMP	M6 x 32	1

1. Fit a new crankshaft front cover oil seal (1a) using the tool (1b).

	Name	Country
1b	Fitting tool	1.860.990.000

1. Fit crankcase rear cover (1b) and secure by tightening bolts (1a) to the specified torque.

The rear crankcase cover comes with an oil seal.

	Fastening	Component	Ø	Value(daNm)
1a	Bolt	FLYWHEEL SIDE COVER	M6 x 20	1

	Fastening	Component	Ø	Value(daNm)
1a	Bolt	FLYWHEEL SIDE COVER	M6 x 32	1

1. Fit the flywheel lock.

	Name	Country
1	Counter-torque	1.860.846.000

2. Fit the flywheel (2a), complete with retaining shim (2b) and fix it tightening the bolts (2c) to the recommended torque.

	Fastening	Component	Ø	Value(daNm)
-	Bolt	FLYWHEEL	M8	4.4

1. Fit the gear on the crankshaft.2. Fit the crankshaft locking tool.

	Name	Country
2	Counter-torque	1.870.763.000

3. Secure the crankshaft gear by tightening the bolt to the specified torque.

	Fastening	Component	Ø	Value(daNm)
-	Bolt	TOOTHED DRIVE PULLEY	M12 x 1.25	2 + 90°

1. Fit the flywheel lock.

	Name	Country
1	Counter-torque	1.860.846.000

2. Fit the flywheel (2a), complete with retaining shim (2b) and fix it tightening the bolts (2c) to the recommended torque.

	Fastening	Component	Ø	Value(daNm)
2c	Bolt	FLYWHEEL	M8	4.4

1. Line up the driven plate for fitting the clutch assembly (1a), using the centring pin (1b).

	Name	Country
1b	Clutch centering	1.870.418.000

2. Tighten the bolts fixing the clutch to the engine flywheel.Remove the engine flywheel lock applied previously.

Clean the crankcase and oil sump contact surfaces to remove traces of silicone sealant.1. Apply an unbroken strip of the recommended sealant to the entire perimeter of the crankcase sump as shown in the figure.

Ensure a perfect join between start and end section.

	Type	Component	Name	Qty.
1	Silicon sealant	PISTON SET	LOCTITE 5900	-

2. Refit crankcase sump (2a) and secure by tightening bolts (2b) and nuts (2c) to the specified torque.

When fitting the crankcase sump, avoid major sideways movements which may remove the sealant.

	Fastening	Component	Ø	Value(daNm)
2b	Bolt	OIL SUMP	M6	1

	Fastening	Component	Ø	Value(daNm)
2c	Nut	OIL SUMP	M6	0.5

1. The timing is adjusted with the four pistons in line, i.e. half way along the effective travel. It is therefore essential to position the crankshaft so it is in line with the camshafts. Position approximately by turning crankshaft gear (1a) until locating dowel (1b) is positioned on the opposite side to the seat of rpm and TDC sensor (1c) and with the first cylinder piston descending, i.e. in intake stage.

Remove the protective cover for the camshaft rear gears.1. Undo the camshaft housing side plugs.

1. Position tools (1a) into the seats of the caps unscrewed previously, then turn the camshafts until splines (1b) on each camshaft are aligned with tool pin (1c). The camshafts will be timed in this way.

	Name	Country
1a	Locating pin	1.860.985.000

Refit the cover protecting the rear camshaft gears.Fit the centering pins on the crankcase1. Position the cylinder head gasket with the wording 'ALTO' [TOP] facing you. Take care not to contaminate or lubricate the gasket and crankcase surface. The arrowed holes decrease in diameter from the 1st to the 4th cylinder so that coolant is distributed evenly over the entire crankcase.A = intake sideB = exhaust side

ASTADUR type cylinder head gaskets are fitted. These gaskets are made from a special material designed to undergo polymerization during the use of the engine. This means that they harden considerably during use.

In order for the polymerization process to take place it is necessary:

to keep the gasket in its sealed plastic bag;
not to take out of its container until ready to fit
not to lubricate the gasket or contaminate with oil, and to ensure the crankcase and cylinder head surfaces are clean.

Position the cylinder head on the crankcase and ensure the locating pins are aligned.1. Tighten the cylinder head bolts (1a) to the recommended torque using the angular tightening tool (1b).

Follow the order shown in the diagram for each tightening sequence.

	Fastening	Component	Ø	Value(daNm)
1a	Bolt	CYLINDER HEAD	M9 x 1.25	3 + 90° + 90°

	Name	Country
1b	Protractor	1.860.942.000

1. Fit the cylinder head extension gasket to the cylinder head mating surface.2. Position tappet retaining tools (2a) beneath the cylinder head extension, then position the cylinder head extension on the cylinder head and withdraw the tools.3. Use tool (3a) to tighten the cylinder head extension bolts (3b) to the specified torque.4. Refit caps and tighten to the specified torque.

	Name	Country
2	Tappet retaining tool	1.860.988.000

	Name	Country
3a	Key	1.860.834.000

	Fastening	Component	Ø	Value(daNm)
3b	Bolt	CYLINDER HEAD EXTENSION	M8 x 1	1.5

Fit the camshaft drive pulley and tighten the retaining bolt.1. Position the tools (1a) in the housings for the spark plug for cylinders 1 and 2, tightening the components (1b) to a torque of 0.5 daNm.2. Turn the crankshaft in its normal direction of rotation until surface (2a) on the mobile part of the tool is aligned with surface (2b) on the fixed part in the spark plug socket. When both tools positioned in the spark plugs seats are in this condition, the engine pistons are aligned with one another, i.e. half away along their effective travel.

The pistons were already approximately aligned previously.

The camshafts were timed previously through the fitting of the tools (3b).

	Name	Country
1a	Bearings	1.860.992.000

	Name	Country
3b	Locating pin	1.860.985.000

1. Proceed with fitting the timing drive belt, fitting it initially on the crankshaft gear (1a), the water pump pulley (1b), the camshaft drive pulley (1c) and, lastly, on the belt tensioner pulley (1d).

Make sure that this operation is carried out with the camshaft pulley (1c) slack.

1. Using suitable pliers, rotate the automatic tensioner placing it in the maximum tension position, i.e. with the moving reference (1a) positioned as illustrated in the diagram then lock the nut (1d) fixing the tensioner to the support.

1. Using the tool (1a) tighten the bolt (1b) fixing the camshaft pulley to the recommended torque.Remove the tools positioned previously for timing and locking the camshafts and rotate the crankshaft through two revolutions in its direction of rotation to let the timing drive belt bed in.

	Name	Country
1a	Support for counter-torque	1.860.831.000

	Name	Country
1a	Spanner for camshaft pulley rotation	1.860.831.002

	Fastening	Component	Ø	Value(daNm)
1b	Bolt	TIMING GEAR DRIVEN PULLEYS	M12 x 1.25	12

1. Loosen the nut fixing the tensioner and ensure that the moving reference (1a) coincides with the fixed reference (1b) retaining the tensioner using the special pliers so as not to release the tension suddenly.2. Once the two references are aligned, tighten the nut (2a) fixing the tensioner to the recommended torque.Rotate the crankshaft through a further two revolutions in its direction of rotation, then repositino the tools used for timing the engine and check that the timing is correct.Refit the side plugs in the camshaft housing.

	Fastening	Component	Ø	Value(daNm)
2a	Nut	MOBILE TIMING TENSIONER	M8	2.5

Refit the lower shield and the upper shield for the timing drive belt.Fit the auxiliary shaft drive pulley on the crankshaft and tighten the fixing bolts to the recommended torque.

	Fastening	Component	Ø	Value(daNm)
-	Bolt	CRANKSHAFT PULLEY	M8	2.2

Fit the rpm and TDC sensor and fix it with its bolts.Refit the engine oil dipstick.Refit the inlet manifold complete with injectors and butterfly casing.Position the electrical wiring and connect the electrical connections.

	Name	Connector
-	Integrated throttle body actuator	N75

	Name	Connector
-	Fuel vapour recovery solenoid	L10

	Name	Connector
-	Engine temperature sender unit	K36

	Name	Connector
-	Data not available yet	D80

	Name	Connector
-	Earth on engine	C40

	Name	Connector
-	Detonation sensor	K50

	Name	Connector
-	Engine oil pressure sensor (switch)	K30

	Name	Connector
-	Data not available yet	K42

	Name	Connector
-	RPM sensor	K46

Position the part of the wiring concerned in the duct. - 1004D40 engine - position on stand and remove