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

Removing ( Refitting ) Proceed with removal  - 1004D40  engine - position on stand and remove . 1. Disconnect the electrical connections from the ignition coils.

NameConnector
1Ignition coil  A30 
2. Undo nut (2a) and disconnect earth lead (2b) from the cam cover.3. Undo the bolts (3a) and move wiring duct (3b) aside.
1. Undo the bolts (1a) and remove the ignition coil (1b).
1. Undo the bolts (1a) and remove the tappet cover (1b), complete with seal.
1. Undo the bolts (1a) and remove the crankshaft pulley (1b).2. Undo the bolts (2a) and rmeove the lower timing cover (2b).
1. Loosen the nut for the counter-balance shaft toothed drive belt tensioner.2. Release and remove the counter-balance shaft drive belt.
1. Loosen the nut securing the timing belt mobile tensioner.2. Prise off and remove the timing belt.
1. Undo the plug and drain the engine oil.
Collect the engine oil in a suitable container.
Rotate the engine through 180° on the overhauling stand.1. Undo the front and rear bolts (1a) securing the crankcase sump using tool (1b).

NameCountry
1bSpanner1.860.833.001
2. Undo the side bolts (2a) securing the crankcase sump using tool (2b).

NameCountry
2bSpanner1.860.834.001
3. Use the tool to cut the crankcase sump sealant.

NameCountry
3Blade1.870.718.000
4. Remove the crankcase sump.
1. Undo the nuts (1a) and remove the timing side rigid engine support (1b).2. Undo the bolts (2a) and remove the counter-rotating balancer shaft drive belt drive pulley (2b).
1. Fit the flywheel lock.

NameCountry
1Counter-torque1.860.846.001
1. Undo the bolt (left) (1a) and remove the drive pulley (1b).
1. Undo the bolts (1a) and remove the engine flywheel (1b).
The engine flywheel retaining bolts are treated with a compound to prevent them coming undone they should therefore be replaced whenever they are removed.
2. Remove the flywheel lock.

NameCountry
2Counter-torque1.860.846.001
1. Undo the bolts (1a) and remove the engine flywheel protection (1b).
1. Undo the bolt securing the engine oil intake to the main bearing cap.
1. Undo bolts (1a) and remove the crankshaft front cover (1b) with built-in oil pump complete with inlet (1c), engine oil heat exchanger (1d) and engine oil filter (1e). 2. Remove the gasket.
Prise out the oil seal from the front crankcase cover.
Take care not to damage the oil seal seat during removal.
1. Fit the tool for rotating the crankshaft.

NameCountry
1Flange1.820.618.000
Turn the crankshaft using the tool fitted previously to gain access to the big end bearing cap bolts.1. Undo the bolts (1a) and remove the connecting rod caps (1b) and bearing shells (1c).2. Remove the tool for rotating the crankshaft.

NameCountry
2Flange1.820.618.000
1. Undo the bolts (1a) and remove the crankcase rear cover with the oil seal integrated (1b).
Check that the crankshaft end float is within the recommended values using a magnetic base fitted with a dial gauge.

MeasurementValue
-Crankshaft end float (mm)0.059 ÷ 0.221
1. Undo the bolts (1a) and remove the main bearing caps (1b) complete with bearing shells (1c).2. Remove the crankshaft.3. Remove the half-bearings.4. Remove the thrust washers.
Refitting ( Removing ) Check that the main bearing halves are not scored and that they do not show traces of binding. if this is not the case, replace them.
The bearing halves must not be adapted in any way.
Check that the thickness of the main journal half-bearings is within the recommended values; if this is not the case, replace them. if this is not the case, replace them.

MeasurementValue
-Crankshaft bearing thickness (mm)Category B1.839 ÷ 1.843
Category C1.842 ÷ 1.846
Class A1.836 ÷ 1.840
Check that the thickness of the connecting rod half-bearings is within the recommended values; if this is not the case, replace them. if this is not the case, replace them.

MeasurementValue
-Crankpin thickness (mm)Category B1.530 ÷ 1.534
Category C1.533 ÷ 1.537
Classe A1.527 ÷ 1.531
Specially-selected main and crankshaft half-bearings are fitted to this engine to ensure that the matching clearance is optimum.
The crankshaft is supplied, by the Parts Dept., without the appropriate half-bearings for 'standard' dimension main journals and crank pins; it is therefore necessary to select the half-bearings to be fitted by identifying the grade for each main journal and crank pin for the new crankshaft.

The following is needed for selecting the main journal half-bearings:

  • the code number stamped on the phonic wheel;
  • the paint mark, if present, next to the main journals.
Below is an example of the identification of main journal grades.
1 - Crank pin identification number: the number on the left refers to the first timing side bearing; the final 'N' is a code that does not matter for 4 cylinder engines. 2 - Main journal identification code: the first number on the left refers to the first timing side bearing; the final 'N' is a code that does not matter for 4 cylinder engines. 3 - Set of numbers (if present), in groups of two digits, which indicate the dimensions (thousandth part) of the crankpins: the first two numbers on the left refer to the first pin on the timing side.
Only use the codes in the key, all other codes on the flywheel should not be used.
For the identification of the main journal grade, refer to the numerical code for reference 2 in the key.In the case of the example, the numbers 11111N indicate that all five bearings are Grade A (red colour) as described below.A further method for identifying the grade of the bearings is to read reference 3 in the figure (if present).In the case of the example, the number 84 (first on the left) corresponds to the dimension 52.984 for the first bearing on the timing side which identifies Grade A (red colour); the same method can be used for all 87 - 85 - 85 - 8497 - 95 - 95 - 94). MAIN JOURNAL IDENTIFICATIONGrade A main journal (standard), diameter 52.982 52.988 mm, RED paint mark, code number 1 (82 88)* Grade B main journal (normal), diameter 52.988 52.994 mm, BLUE paint mark, code number 2 (88 94)*Grade C main journal (standard), diameter 52.984 53.000 mm, YELLOW paint mark, code number 3 (94 00)* Grade D main journal (0.127 undersize) diameter 52.855 52.861 mm, BROWN paint mark, code number 6 (55 61)* Grade E main journal (0.127 mm undersize) diameter 52.861 52.867 mm, GREEN paint mark, code 7 (61 67)* Grade F main journal (0.127mm undersize) diameter 52.867 52.873 mm, BLACK paint mark, code number 8 (67 73)* (*) Last two numbers (thousandth part) of the dimensions of the main journals. If a crankshaft is being used where the maximum bearing undersize through regrinding is 0.127 mm, then the grade should be selected by measuring the dimensions of the diameter of the bearing with reference to the above. Having defined the grade and colour for each new or reground crankshaft bearing, it is necessary to select the pair and the size for the bearings which should be the same colour as the corresponding bearing; at the Parts Dept. it is possible obtain the part no. of the pair of half-bearings required The above is designed to ensure the optimum operating clearance for all bearings.Lastly, we wish to point out that, usually, the clearance between the main journal and the half-bearing, produced by the selection method described above, should be 0.031 0.051 mm; this value can be measured, as a final check, using the Plastic Gauge as described below. Place the main half-bearings, selected as described above, back in their housings in the cylinder block/crankcase.
Observe scrupulous cleanliness during assembly.
1. Place the crankshaft back in its housing.2. Fit the calibrated wire (Plastigage) to measure the main journal clearance.
1. Place the bearing cap (1a), complete with half-bearing, back in its housing and secure it by tightening the nuts (1b) to the recommended torque.
The bearing caps are marked with progressive reference notches (from zero to four starting from the front of the engine) which define their fitting position.
The safety notches on the crankcase and main bearing caps must all be on the same side.

FasteningComponentØValue(daNm)
1bNutMAIN BEARING CAPSM12(Engine crankcase side) 2.5 + 79°
2. Use the tool for angular tightening of the main bearing cap bolts.

NameCountry
2Protractor1.860.942.000
1. Remove the bearing caps fitted previously and, using a suitable graduated measuring instrument (1a), measure the clearance shown by the calibrated wire (1b).
Measure the clearance at all the bearings, taking care to carry out this operation, one bearing at a time, without ever moving the crankshaft.

MeasurementValue
1Crankpin/bearing shell play (mm)0.031 ÷ 0.051
If the readings are not within the specified range, replace the main bearing halves with new bearing halves of appropriate size and category.
Refit the main bearing halves.Place the thrust washers (thickness depending on the crankshaft endfloat measured during the dismantling) back in their housings in the third main bearing.
The lubrication ducts in the thrust washers are fitted facing the crankshaft shoulder.
Place the crankshaft back in its housing.1. Place the bearing caps (1a), complete with half-bearings, back in their housings and secure them by tightening the nuts (1b) to the recommended torque.
The bearing caps are marked with progressive reference notches (from zero to four starting from the front of the engine) which define their fitting position.
The safety notches on the crankcase and main bearing caps must all be on the same side.

FasteningComponentØValue(daNm)
1bBoltMAIN BEARING CAPSM122.4 ÷ 2.6 + 100?
2. Use the tool for angular tightening of the main bearing cap bolts.

NameCountry
2Protractor1.860.942.000
1. Fit the tool for rotating the crankshaft.

NameCountry
1Flange1.820.618.000
Specially-selected main and crankshaft half-bearings are fitted to this engine to ensure that the matching clearance is optimum.
The crankshaft is supplied, by the Parts Dept., without the appropriate half-bearings for 'standard' dimension main journals and crank pins; it is therefore necessary to select the half-bearings to be fitted by identifying the grade for each main journal and crank pin for the new crankshaft.

The following is needed for selecting the main journal half-bearings

  • the code number stamped on the phonic wheel;
  • the paint mark, if present, next to the crankpins.
Below is an example of the identification of crankpin grades.
1 - Crank pin identification number: the number on the left refers to the first timing side bearing; the final 'N' is a code that does not matter for 4 cylinder engines. 2 - Main journal identification code: the first number on the left refers to the first timing side bearing; the final 'N' is a code that does not matter for 4 cylinder engines. 3 - Set of numbers (if present), in groups of two digits, which indicate the dimensions (thousandth part) of the crankpins: the first two numbers on the left refer to the first pin on the timing side.
Only use the codes in the key, all other codes on the flywheel should not be used.
For the identification of the crankpin grade, refer to the numerical code for reference 1 in the key. In the case of the example, the numbers 2222N indicate that all four bearings are Grade B (blue) as described belowCRANKPIN IDENTIFICATIONCrankpin grade A (standard), diameter 50.787 50.793 mm, RED paint spot, code number 1 (87 93)* Grade B crankpin (standard), diameter 50.793 50.799 mm, BLUE paint mark, code number 2 (93 99)* Grade C crankpin (standard), diameter 50.799 50.805 mm, YELLOW paint mark, code number 3 (99 05)* Grade D crankpin (0.127mm undersize) diameter 50.660 50.666 mm, BROWN paint mark, code number 6 (60 66)*Grade E crankpin (0.127 mm undersize) diameter 50.666 50.672 mmmm, GREEN paint mark, code 7 (66 72)*Grade F crankpin (0.127 undersize) diameter 50.672 50.678 mm, BLACK paint mark, code number 8 (72 78)* (*) Last two numbers (thousandth part) of the dimensions of the main journals. If a crankshaft is being used where the maximum bearing undersize through regrinding is 0.127 mm, then the grade should be selected by measuring the dimensions of the diameter of the bearing with reference to the above. Having defined the grade and colour for each new or reground crankshaft bearing, it is necessary to select the pair and the size for the bearings which should be the same colour as the corresponding bearing; at the Parts Dept. it is possible obtain the part no. of the pair of half-bearings required The above is designed to ensure the optimum operating clearance for all bearings.Lastly, we wish to point out that, usually, the clearance between the crankpin and the half-bearing, produced by the selection method described above, should be 0.030 0.056 mm. this value can be measured, as a final check, using the Plastic Gauge as described below. Turn the crankshaft to gain access to the crankpins.1. Fit the calibrated wire (Plastigage) to measure the relevant crankpin clearances.
1. Refit the connecting rod cap (1a) complete with half-bearin, selected as described previously, and secure by tightening the bolts (1b) to the recommended torque.
The safety notches on the connecting rod cap and connecting rod head must be on the same side.

FasteningComponentØValue(daNm)
1bBoltBIG END BEARING CAPSM92.4 ÷ 2.6 +60?
2. Use the tool for angular tightening of the connecting rod cap bolts.

NameCountry
2Protractor1.860.942.000
1. Remove the connecting rod cap fitted previously and, using a suitable graduated measuring instrument (1a), measure the clearance shown by the calibrated wire (1b).
Measure the clearance at all the bearings, taking care to do it one bearing at a time without ever moving the crankshaft.

MeasurementValue
-Crankpin/big end bearing play (mm)0.030 ÷ 0.056
If the value measured does not correspond to the recommended figures, replace the connecting rod half bearings with new ones of appropriate size and category.
1. Refit the connecting rod bearing caps (1a), complete with half-bearings and secure them by tightening bolts (1b) to the recommended torque.
The safety notches on the connecting rod cap and connecting rod head must be on the same side.

FasteningComponentØValue(daNm)
1bBoltBIG END BEARING CAPSM92.4 ÷ 2.6 +60?
2. Use the tool for angular tightening of the connecting rod cap bolts.

NameCountry
2Protractor1.860.942.000
Remove the tool for rotating the crankshaft.

NameCountry
-Flange1.820.618.000
1. Refit the rear crankcase cover with built-in oil seal (1a) using tool (1b).

NameCountry
1bFitting tool1.820.619.000
2. Tighten the rear crankcase cover bolts with the built-in oil seal to the specified torque.

FasteningComponentØValue(daNm)
2BoltCRANKSHAFT REAR COVERM6(Engine crankcase side) 0.8 ÷ 1.0
1. Refit oil seal (1a) in the front crankcase cover using tool (1b).

NameCountry
1bFitting tool1.821.147.000
Rotate the engine throughi 180° on the overhauling stand.1. Fit the engine block front cover (1a) with built-in oil pump complete with gasket (1b), intake chamber (1c) and engine oil heat exchanger (1d). 2. Tighten the crankcase front cover bolts to the specified torque.

FasteningComponentØValue(daNm)
2BoltCRANKSHAFT FRONT COVERM6(Engine crankcase side) 0.8 ÷ 1.0
Tighten the engine oil air intake bolt to the main bearing cap.Place the engine flywheel protection back in its housing and secure it using the bolts.1. Fit the flywheel lock.

NameCountry
1Counter-torque1.860.846.000
2. Refit the engine flywheel (2a) and secure by tightening new sealant-treated bolts (2b) to the recommended torque.
The engine flywheel retaining bolts are treated with a compound to prevent them coming undone they should therefore be replaced whenever they are removed.

FasteningComponentØValue(daNm)
2bBoltFLYWHEELM12(Crankshaft side) 14.4 ÷ 17.6
Use the tool for angular tightening of the engine flywheelbolts.

NameCountry
-Protractor1.860.942.000
1. Place the toothed drive pulley (1a) back in its housing and secure it by tightening the bolt (left hand thread) (1b) to the recommended torque.

FasteningComponentØValue(daNm)
1bBolt with left hand threadTOOTHED DRIVE PULLEYM16(Crankshaft side) 20.9 ÷ 23.1
Remove the flywheel lock.

NameCountry
-Counter-torque1.860.846.001
1. Refit the timing side rigid engine support (1a)and secure it tightening the bolts (1b) to the recommended torque.

FasteningComponentØValue(daNm)
1bBoltENGINE MOUNT TIMING SIDEM10(Crankcase side) 4.5 ÷ 5.5
Apply silicon sealant around the edge of the crankcase sump.1. Position the sump on the crankcase.2. Tighten the front and rear bolts (2a) fixing the crankcase sump to the recommended torque using the tool (2b).

FasteningComponentØValue(daNm)
2aFront and rear boltsOIL SUMPM6(Engine crankcase side) 0.8 ÷ 1.0

NameCountry
2bSpanner1.860.833.001
3. Tighten the side bolts (3a) fixing the crankcase sump to the recommended torque using the tool (3b).

FasteningComponentØValue(daNm)
3aSide boltsOIL SUMPM8(Engine crankcase side) 2.3 ÷ 2.8

NameCountry
3bSpanner1.860.834.001
Tighten the engine oil drain plug to the specified torque.

FasteningComponentØValue(daNm)
--ENGINE OIL DRAIN PLUGM18(Crankcase sump side) 1.8 ÷ 2.2
Rotate the engine throughi 180° on the overhauling stand.1. Fit the tool (1a), complete with dial gauge (1b), in the housing of the spark plug for cylinder no. 1.

NameCountry
1aExtension1.860.895.001
Rotate the crankshaft in a clockwise direction until the piston for cylinder no. 1 is at T.D.C. in the explosion stroke.
If T.D.C. is exceeded, do not turn backwards, but proceed by rotating the crankshaft through a further two revolutions in the same direction until the piston for cylinder no. 1 is at T.D.C.
1. Undo the bolts (1a) of the timing driven pulley, inlet side, using the tool (1b) for counter-torque.

NameCountry
1bCounter-torque1.860.856.001
2. Loosen the bolt (2a) for the exhaust -side driven toothed pulley, using tool (2b) for counter-torque.

NameCountry
2bSpanner for camshaft pulley rotation1.860.831.002
Undo the bolts and remove the 4th cap on the inlet side camshaft and the 2nd cap on the exhaust side camshaft.1. Fit the tool (1a) in place of the camshaft caps removed and fix it tightening the bolts (1b) to the recommended torque.
Check that the camshaft cam profile matches the tool correctly.

NameCountry
1aGauge1.870.859.000

FasteningComponentØValue(daNm)
1bBoltENGINE TIMING ADJUSTMENT TEMPLATESM7(Cylinder head side) 1.0
1. Fit the timing belt, following the order indicated in the diagram.toothed drive pulley (1a)fixed tensioner (1b)exhaust side toothed driven pulley (1c)
Before fitting the belt on the exhaust side driven pulley, rotate it in a clockwise direction (see diagram) until the end of travel position.
inlet side toothed driven pulley (1d).
Before fitting the belt on the inlet side driven pulley, rotate it in a clockwise direction (see diagram) until the end of travel position.
mobile tensioner (1e)coolant pump pulley (1f).
When fitting, ensure that the arrow stamped on the belt is facing in the direction of engine rotation (clockwise - timing side).
1. Using the tool, rotate the timing moving tensioner until the maximum tension is applied to the timing belt.

NameCountry
1Key1.822.149.000
2. Tighten the nut for the moving tensioner to the recommended torque.

FasteningComponentØValue(daNm)
2NutMOBILE TIMING TENSIONERM82.3 ÷ 2.8
1. Tighten the bolts (1a) for the camshaft driven pulley, inlet side, to the recommended torque using the tool (1b) for counter-torque.

FasteningComponentØValue(daNm)
1aBoltTIMING GEAR DRIVEN PULLEYSM6(Inlet camshaft side) 0.8 ÷ 1.0

NameCountry
1bCounter-torque1.860.856.001
2. Tighten the bolt (2a) securing the exhaust side timing driven pulley to the recommended torque, using the tool (2b) for counter-torque.

FasteningComponentØValue(daNm)
2aBoltTIMING GEAR DRIVEN PULLEYSM12(Exhaust camshaft side) 10.8÷13.2

NameCountry
2bSpanner for camshaft pulley rotation1.860.831.002
Remove the tool for timing the camshafts.

NameCountry
-Gauge1.870.859.000
Place the previously removed camshaft caps back in their housings and secure them tightening the bolts to the recommended torque.

FasteningComponentØValue(daNm)
-BoltCAMSHAFT SUPPORTSM7(Cylinder head side) 1.4 ÷ 1.7
Rotate the crankshaft through two revolutions in its direction of rotation (clockwise - timing side) and ensure that the piston for cylinder no. 1 is at TDC.1. Fit the tool (1a) for keeping the moving timing tensioner still and loosen the tensioner nut (1b).

NameCountry
1aKey1.822.149.000
2. Rotate the tool (2a) in an anti-clockwise direction (timing side) until the tensioner moving reference (2b) coincides with the reference opening (2c).

NameCountry
2aKey1.822.149.000
3. Tighten the nut for the moving tensioner to the recommended torque.

FasteningComponentØValue(daNm)
3NutMOBILE TIMING TENSIONERM82.3 ÷ 2.8
Rotate the crankshaft through two revolutions in its direction of rotation (clockwise - timing side) until cyllinder no. 1 is at TDC in the explosion stroke and check that the engine timing is correct using the tool.

NameCountry
-Gauge1.870.859.000
Remove the tool to check T.D.C. from the cylinder 1 spark plug socket.

NameCountry
-Extension1.860.895.001
Place the spark plug for cylinder no. 1 back in its housing and tighten them to the recommended torque.

FasteningComponentØValue(daNm)
--SPARK PLUGSM14(Cylinder head side) 2.4 ÷ 3.0
Place the counter-balance shaft drive belt drive pulley back in its housing and secure it tightening the bolts to the recommended torque.

FasteningComponentØValue(daNm)
-BoltCOUNTER-ROTATING SHAFT DRIVE PULLEYM6(Timing drive pulley side.) 0.8÷1.0
1. Rotate the counter-balance shafts so that the references (1a) on the pullies are aligned with the ribs (1b).2. Temporarily fit the lower timing cover and the crankshaft pulley and check the alignment of the references. Fit the counter-balance shaft toothed drive belt.
1. Tension the counter-balance shaft drive belt using the tool (1a) so that the reference opening (1b) in the belt tensioner is at the centre of the rotation sector.

NameCountry
1aKey1.822.154.000
2. Tighten the nut fixing the counter-balance shaft drive belt tensioner to the recommended torque.

FasteningComponentØValue(daNm)
2NutCOUNTER-ROTATING SHAFT BELT TENSIONERM6(.Left. counter balance shaft front) cover side 0.8÷1.0
1. Fit the lower protective timing cover (1a) and secure using the bolts (1b).2. Place the crankshaft pulley (2a) back in its housing and secure it by tightening bolts (2b) to the recommended torque.

FasteningComponentØValue(daNm)
2bBoltCRANKSHAFT PULLEYM82.3 ÷ 2.8
1. Place the tappet cover (1a), complete with gasket, back in its housing and secure it tightening the bolts (1b) to the recommended torque.

FasteningComponentØValue(daNm)
1bBoltCAM COVERM6(Cylinder head side) 0.8 ÷ 1.0
1. Place the ignition coils (1a) back in their housings and secure them by tightening bolts (1b) to the recommended torque.

FasteningComponentØValue(daNm)
1bBoltIGNITION COIL/REELM6(Tappet cover side) 0.8 ÷ 1.0
Refit the wiring duct and secure with bolts.Connect the earth lead to the tappet cover and secure it with its bolt.Connect the electrical connections to the ignition coils. Proceed with refitting  - 1004D40  engine - position on stand and remove .