1016E10 SINGLE CYLINDER HEAD, REMOVED - OVERHAUL - Fiat - NUOVA 500 - eLearn

312002368 - 1016E10 SINGLE CYLINDER HEAD, REMOVED - OVERHAUL

) 1. Position cylinder head (1a) in the vice supporting it using support tool (1b).

Tool	Description	Function	Validity
1.860.470.000	Mount	Head overhaul	all versions

2. Unscrew the spark plugs and remove them.3. Undo bolts (3a) and remove thermostat (3b) complete with O-ring.

1. Undo nut (1a) and remove moving timing belt tensioner (1b).

1. Fit the valve retaining tool beneath the cylinder head.

Tool	Description	Function	Validity
1.860.786.000	Base	Valve retention	1.4 16V

2. Remove half-cones (2a) using tools (2b) and (2c).

Tool	Description	Function	Validity
1.860.644.000	Lever	Dismantling valves	1.4 16V

Tool	Description	Function	Validity
1.870.890.000	Chamber	Valve cotter removal	1.2 8V1.4 16V

3. Fit the upper valve shims.4. Remove the valve springs.5. Remove the valves.

1. Use tool (1a) to remove oil seals (1b) from the valve guides.

Tool	Description	Function	Validity
1.870.894.000	Calliper	Removing valve guide oil seals	1.3 Mjet1.4 16V

2. Fit the lower valve shims.

- Remove the valve retaining tool and keep the valves.- Loosen the vice, remove the cylinder head and place it on the bench.- Remove the cylinder head support tool. Op. 1016E14 VALVE GUIDES IN SINGLE CYLINDER HEAD - REPLACE DURING OP. 1016E10

Refitting ( Removing

) - De-carbonize and clean the valve seats and ducts.- Clean any traces of the old gasket from the lower cylinder head surface.- Check that the cylinder head plane flatness is within the recommended values.

Measurement	Value	Validity
Cylinder head support surface flatness (mm)	< 0.1	1.2 8V1.4 16V

- If necessary, flatten the lower cylinder head surface; it is permitted to remove 0.1 mm of material from the minimum cylinder head height (factory value).

Measurement	Value	Validity
Cylinder head height (factory value) (mm)	77 ± 0.2	1.4 16V

1. Check that the refacing has not changed any of the combustion chambers in the areas or else the head must be replaced.

- Also check all the combustion chambers proceeding as follows:1. Fit the valves and spark plugs provisionally. Take a graduated burette containing a known amount of engine oil.2. Rest a glass plate on the cylinder head with holes corresponding to the combustion chambers.3. Fill the combustion chamber completely, taking care not to pour oil outside the combustion chamber.- Wait about 10 minutes to allow the oil to decant.- Measure the amount of oil remaining in the burette and then calculate the difference between this and the amount of oil used initially with the burette full. The difference is the volume of the chamber.- Check that this value is within specified values, otherwise replace the cylinder head.

Measurement	Value	Validity
Combustion chamber volume (cc)	14	1.4 16V

- Check that the valve stem does not show signs of grooves or seizing.- Check that the diameter of the valve stems corresponds to the recommended figures; if not, replace the worn valves.

Measurement	Value	Validity
Inlet valve stem diameter	5.982 ÷ 6.000	1.4 16V

Measurement	Value	Validity
Exhaust valve stem diameter	5.974 ÷ 5.992	1.4 16V

- Check that the diameter of the mushroom valve corresponds to the recommended figures; if not, replace the valves.

Measurement	Value	Validity
Inlet valve outer diameter	27.020 ÷ 27.050	1.4 16V

Measurement	Value	Validity
Inlet valve inner diameter	22.520 ÷ 22.550	1.4 16V

- Check that the inner diameter of the valve guide and the clearance between it and the valve are within specified values, otherwise replace the valve guide.- If necessary, replace the valve guides, refer to Op. 1016E14 VALVE GUIDES IN SINGLE CYLINDER HEAD - REPLACE DURING OP. 1016E10

Measurement	Value	Validity
Valve guide inner diameter (mm)	6.022 ÷ 6.040	1.4 16V

Measurement	Value	Validity
Valve/valve guide clearance - intake (mm)	0.022 ÷ 0.058	1.4 16V

Measurement	Value	Validity
Valve/valve guide clearance - exhaust (mm)	0.030 ÷ 0.066	1.4 16V

- Using special equipment, check that the valve spring specifications are within the recommended values; if this is not the case, replace the components that do not comply.

Measurement	Value	Validity
Valve spring height released (mm)	46.9	1.4 16V

Measurement	Value	Validity
Length of valve springs under a load of 14.9 - 16.5 daN (mm)	37.52	1.4 16V

Measurement	Value	Validity
Length of valve springs under a load of 31.1 - 34.1 daN (mm)	30.0	1.4 16V

1. Fit lower valve shims (1a); place oil seals (1b) on the valve guides, positioning installing tool guide (1c) on the valve stem fitted provisionally in its seat, then fit a new oil seal on the installing tool.2. Fit the oil seal in its housing using the fitting tool.

Tool	Description	Function	Validity
1.860.993.000	Installing tool	Fitting valve guide oil sealing ring	1.4 16V

- Refit the valves, springs, upper plates and half-cones using the same equipment, as for the dismantling.- Position the timing belt moving tensioner in its housing and secure it without tightening the nut.- Place the thermostat in its housing with the new O-ring and secure it by tightening the bolts to the recommended torque.

Component	Fastening	dia	Value (daNm)	Validity
Thermostat unit (on cylinder head)	Bolt	M6x1x22	1.0	1.4 16V

- Fit the spark plugs and tighten them to the recommended torque.

Component	Fastening	dia	Value (daNm)	Validity
Spark plugs	-	M12x1.2	1.8	1.4 16V

- Undo the nuts and remove the cylinder head from the support tool.