2753371 - 1016E10 single cylinder head, removed - overhaul

Dismantling ( Reassembling ) Carry out op. 1036B141. Remove the camshaft tappet cases with shims.
1. Fit valve retainer (1a) beneath the cylinder head.

NameCountry
1aStand1.860.749.000
1. Remove cotters (1a) using tool (1b).2. Remove the upper valve shims.3. Remove the valve springs.

NameCountry
1bTool1.860.644.000
1. Using pliers (1a), remove the oil seals (1b) from the valve guides.2. Remove the lower valve shims.

NameCountry
1aExtractor1.860.989.000
Remove the valve retaining tool fitted previously and remove the valves.

NameCountry
-Stand1.860.749.000
1. Undo the nut (1a) and remove the mobile timing drive belt tensioner (1b).2. Remove the spark plugs.
1. Undo the bolts (1a) and remove the thermostat (1b) with gasket.
Reassembling ( Dismantling ) 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 cylinder head planarity and level the lower cylinder head surface if necessary; it is permissible to remove 0.1 mm of material over and above the minimum cylinder head height (factory dimension).

MeasurementValue
-Cylinder head height (construction figure) (mm)126.5 +/- 0.35
After levelling, check that combustion chamber volume is with specified limits as follows.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.

MeasurementValue
-Combustion chamber volume (cm)23.41
If combustion chamber volume is not as specified, remove material from the arrowed points.
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.

MeasurementValue
-Inlet and exhaust valve stem diameter (mm)6.982 - 7.000
Check that the thickness of the cylindrical part of the valve head is within the recommended values.

MeasurementValue
-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.

MeasurementValue
-Inlet valve external diameter (mm)31.20 - 31.50

MeasurementValue
-Exhaust valve external diameter (mm)27.20 - 27.50
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. 1016E14.

MeasurementValue
-Valve guide inner diameter (mm)7.022 - 7.040

MeasurementValue
-Valve stem - valve guide diameter (mm)0.022 - 0.058
Grind the valve seats if the valves and valve guides are replaced.

MeasurementValue
-Upper section taper "" (-)75°

MeasurementValue
-Contact band with valve taper "b" (-)44° 30'

MeasurementValue
-Lower band taper"c" (-)20°

MeasurementValue
-Contact band width with valve "I" (mm)c.a. 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.

MeasurementValue
-Spring height (mm)31
Under load (daN)21.2 - 23.8

MeasurementValue
-Spring height (mm)21.5
Under load (daN)61.4 - 65.5
Check that the diameter of the camshaft journals is within the recommended values; if this is not the case, replace the worn camshaft.

MeasurementValue
-Side bearing diameter (mm)24.000 - 24.015

MeasurementValue
-Centre bearing diameter (mm)23.500 - 23.515
Check that the nominal lift of the camshaft cams is within the recommended values; if this is not the case, replace the worn camshat.

MeasurementValue
-Nominal cam lift (mm)9.5
Check that the diameter of the camshaft tappet casing housings are within the recommended values; if this is not the case, replace the worn parts.

MeasurementValue
-Outer diameter (mm)34.975 - 34.995
Check that the diameter of the camshaft tappet casing housings are within the recommended values; If this is not the case, replace the cylinder head.

MeasurementValue
-Tappet casing housing diameter (mm)35.000 - 35.025
Fit the thermostat, complete with a new gasket, and fix it tightening the bolts to the recommended torque.

FasteningComponentØValue(daNm)
-BoltTHERMOSTATM6 x 11
Fit the spark plugs and tighten them to the recommended torque.

FasteningComponentØValue(daNm)
--SPARK PLUGSM14 x 1.52.7
Fit the timing moving tensioner and fix it using the nut without tightening it.1. Fit flywheel retaining tool (1a) after positioning the valves in their seats.

NameCountry
1aStand1.860.749.000
1. Fit the lower valve shim.2. Fit the valve guide oil seal (2a) using tool (2b).

NameCountry
2bFitting tool1.860.313.000
Refit the valve springs, upper valve shims and cotters using the same tools as used for the dismantling.

NameCountry
-Tool1.860.644.000
Remove the valve retainer removed previously.

NameCountry
-Stand1.860.749.000
Fit the camshaft tappet cases with shims. - 1036B14  overhead camshaft - r r on vehicle - with cylinder head removed