2585285 - 1016E10 single cylinder head, removed - overhaul
Removing
(
Refitting
)
1. Position the cylinder head (1a) in a vice using the tool (1b). | Description | Code | Function |
|---|
| 1b | Support | 1.860.470.000 | Cylinder head support |
- Unscrew the bolt and remove the toothed driven pulley.- Undo the nut and remove the mobile timing belt tensioner.
1. Undo the bolts (1a) and remove the camshaft caps (1b).2. Remove the camshaft.3. Remove the camshaft front oil seal.
1. Remove the tappet sleeves with shims.
1. Remove the spark plugs.
1. Fit the valve retaining tool beneath the cylinder head. | Description | Code | Function |
|---|
| 1 | Stand | 1.860.749.000 | Valve support |
1. Fit the cotters (1a) using the tools (1b) and (1c). | Description | Code | Function |
|---|
| 1b | Lever | 1.860.644.001 | Removing/refitting valves |
| Description | Code | Function |
|---|
| 1c | Chamber | 1870890000 | Valve cotter removal |
2. Fit the upper valve shims.3. Remove the valve springs.
1. Use tool (1a) to remove oil seals (1b).2. Fit the lower valve shims.
- Replace the valve guides Op. 1016E14 SINGLE CYLINDER HEAD VALVE GUIDES - REPLACE DURING OPERATION 1016E10
Refitting
(
Removing
)
- Clean any residues of the old gasket from the lower cylinder head plane. Op. 1016E38 SINGLE CYLINDER HEAD OR (ONE) L OR R, REMOVED - GRINDING- Check that the diameter of the valve stems corresponds to the recommended figures; if not, replace the worn valves. | Subject | Value |
|---|
| - | Inlet valve stem diameter (mm) | 4.982 ÷ 5.000 |
| Subject | Value |
|---|
| - | Exhaust valve stem diameter (mm) | 4.974 ÷ 4.992 |
- Check that the diameter of the valve head corresponds to the recommended figures; if not, replace the valves.
| Subject | Value |
|---|
| - | Inlet valve head diameter (mm) | 33.10 ÷ 33.30 |
| Subject | Value |
|---|
| - | Exhaust valve head diameter (mm) | 27.80 ÷ 28.10 |
- Check that the length of the valve springs released is within the recommended values. | Subject | Value |
|---|
| - | Valve spring free length (mm) | 42.29 |
- Check that the measurements for the valve springs are within the recommended values. | Subject | Value |
|---|
| - | Length of valve springs under a load of 15.5 daN (mm) | 35.10 |
| Subject | Value |
|---|
| - | Length of valve springs under a load of 39 daN (mm) | 26.30 |
- Clean the valve seats thoroughly.- Check that the diameter of the camshaft journals corresponds to the recommended figures; if not, replace the camshaft. | Subject | Value |
|---|
| - | Camshaft bearing diameter - First bearing (mm) | 24.000 ÷ 24.015 |
| Subject | Value |
|---|
| - | Camshaft bearing diameter - Second bearing (mm) | 23.500 ÷ 23.515 |
| Subject | Value |
|---|
| - | Camshaft bearing diameter - Third bearing (mm) | 30.992 ÷ 31.008 |
- Check that the nominal camshaft cam lift corresponds to the recommended figures; if not, replace the worn camshaft. | Subject | Value |
|---|
| - | Nominal camshaft cam lift (mm) | 9.5 |
- Check that the diameter of the cylinder head camshaft tappet sleeve housings corresponds to the recommended figures; if not, replace the cylinder head. | Subject | Value |
|---|
| - | Tappet rod outer diameter (mm) | 34.975 ÷ 34.995 |
- Check that the diameter of the cylinder head camshaft tappet sleeve housings corresponds to the recommended figures; if not, replace the cylinder head. | Subject | Value |
|---|
| - | Tappet sleeve seat diameter (mm) | 35.015 ÷ 35.030 |
- Fit the thermostat complete with a new gasket and secure it using the bolts.- Fit the moving timing belt tensioner and secure it with the nut without tightening.- Fit the valve retaining tool after positioning the valves in their seats. | Description | Code | Function |
|---|
| - | Stand | 1.860.749.000 | Valve support |
1. Fit the lower valve shims.2. Fit the valve guide oil seals (2a) using the tool (2b).
- Fit the valve springs, the upper valve plates and the half-cones using the same tool as for the removal.- Remove the valve retaining tool fitted previously.- Fit the camshaft tappet sleeves with shims.- Fit the camshaft on the cylinder head.- Fit the camshaft caps and secure them tightening the bolts to the recommended torque. | Value daNm | Fastening | Component | dia |
|---|
| - | 1.8 ÷ 2.2 | Bolt | Camshaft caps | M8 |
- Fit the oil seal with the tool. | Description | Code | Function |
|---|
| - | Fitting tool | 1.860.882.000 | Fitting camshaft front oil seal |
- Fit the toothed driven pulley by tightening the bolt provisionally.
