1016E10 SINGLE CYLINDER HEAD, REMOVED - OVERHAUL - Lancia - MUSA - eLearn

184000818 - 1016E10 SINGLE CYLINDER HEAD, REMOVED - OVERHAUL

) 1. Position the cylinder head in the vice (1a), supporting it with a suitable tool (1b).2. Use a suitable wrench to remove the spark plugs

	Name	Country
1b	Support	1.860.470.000

1. Remove the thermostat and the gasket underneath using the fixing bolts.

1. Undo the nut and remove the automatic timing drive belt tensioner.

1. Using the tools (1a), (1b), (1c), (1d) and (1e) as illustrated in the diagram, compress the valve springs.2. Remove the cotters (2a), caps (2b) and springs (2c), then remove the tool to remove the inlet and exhaust valves (2d) from the head.

	Name	Country
1a	Lever	1.860.790.000

	Name	Country
1b	Lever hook	1.860.788.000

	Name	Country
1c	Extension	1.860.787.000

	Name	Country
1d	Valve retaining base	1.860.786.000

	Name	Country
1e	Chamber	1.860.877.000

1. Using pliers (1a), remove the oil seals (1b) from the valve guides.2. Remove the lower valve shims.

	Name	Country
1a	Extractor	1.860.989.000

Refitting ( Removing

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

	Measurement		Value
-	Flatness of bottom surface (mm)		0.1

If necessary, reface the lower cylinder head surface; it is permissible to remove 0.1 mm of material over and above the minimum cylinder head height (factory dimension).

	Measurement		Value
-	Cylinder head height (construction figure) (mm)		77 ± 0.2

1. Check that the levelling operation has not changed any combustion chamber in areas (1a). Otherwise replace the head.

Also check all the combustion chambers following the procedure described below.1. Fit valves and spark plugs provisionally. Take a graduated burette containing a known amount of engine oil.2. Rest a glass sheet with four holes corresponding to the combustion chambers on the cylinder head.3. Complete the filling of the combustion chamber, taking care that no oil comes out of the combustion chamber.Wait for around 10 minutes to allow the decantation of the oil.Measure the quantity of oil remaining in the burette and then calculate the difference between it and the quantity of oil used initially when the burette was full; this value corresponds to the volume of the chamber.Check that this figure corresponds to the recommended values, or else the cylinder head has to be replaced.

	Measurement		Value
-	Combustion chamber volume (cm)		12.28

Check that the valve stem does not show signs of scoring or seizing.Check that the diameter of the valve stems is within the recommended values; if this is not the case, replace the worn valves.

	Measurement		Value
-	Inlet and exhaust valve stem diameter (mm)		5.90 ÷ 5.94

Check that the thickness of the cylindrical part of the valve head is within the recommended values.

	Measurement		Value
-	Valve cylindrical section thickness (mm)		1

Check that the diameter of the valve head is within the recommended values; if this is not the case, replace the valves.

	Measurement		Value
-	Exhaust and inlet valve outer diameter (mm)		22.55 ÷ 27.05

1. Check valve guide bore and valve clearance are within the recommended values or else the valve guide has to be replaced.If necessary, replace the valve guides referring to op. Op. 1016E14 SINGLE CYLINDER HEAD VALVE GUIDES - REPLACE DURING OPERATION 1016E10.

	Measurement		Value
-	Valve guide inner diameter (mm)		6.022 - 6.040

	Measurement		Value
-	Valve stem - valve guide clearance (mm)		0.14 ÷ 0.082

Grind the valve seats if the valves and valve guides are replaced.

	Measurement		Value
-	Upper section taper "" (-)		45° ± 20''

	Measurement		Value
-	Contact band with valve taper "b" (-)		30°

	Measurement		Value
-	Lower band taper"c" (-)		15°

	Measurement		Value
-	Contact band width with valve "I" (mm)		~ 2

Clean the valve seats thoroughly when the operation is complete.

Use the appropriate tool to check that the characteristics of the springs are within the recommended values; if this is not the case, replace parts that have yielded.

	Measurement		Value
-	Spring height (mm)		33.6
	Under load (daNm)	16.7

	Measurement		Value
-	Spring height (mm)		25.2
	Under load (daN)	36.6

1. Fit the lower valve shims (1a); position the oil seals (1b) on the valve guides, using the drift (1c) on the stem pf the valve temporarily fitted in the seat, then fit the new oil seal on the drift.2. Fit the oil seal in the housing using the drift illustrated.

	Name	Country
1c	Drift	1.860.993.000

	Name	Country
2	Drift	1.860.993.000

Refit the valves, springs, caps and cotters using the same tools as used for the dismantling.

	Name	Country
-	Lever	1.860.790.000

	Name	Country
-	Lever hook	1.860.788.000

	Name	Country
-	Extension	1.860.787.000

	Name	Country
-	Valve retaining base	1.860.786.000

	Name	Country
-	Chamber	1.860.877.000

Fit the timing belt tensioner.Fit the thermostat and gasket.Remove the cylinder head from the vice.Remove the cylinder head support tool.

	Name	Country
-	Support	1.860.470.000