SINGLE CYLINDER HEAD, removed - Overhaul

Operation 1016E10 · CYLINDER HEAD/S - VARIOUS OPERATIONS

2.4 JTD 10V

Removing

1. Undo the bolts (1a) and remove the water pump rigid inlet pipe (1b).

2. Remove the seal.

- Place the head on the workbench.

1. Undo the stud using the nut and locknut.

2. Fit the tool (2a) on the cylinder head (2b) and secure it using the nuts (2c).

1. Loosen the manifold side connectors for the pipes from the fuel manifold to the injectors.

2. Undo the injector side connectors for the pipes from the fuel manifold to the injectors.

3. Undo the nuts (3a) and remove the fuel distribution manifold (3b) complete with fuel pressure sensor and pipes (3c).

- Completely undo the connectors loosened previously and separate the pipes from the fuel manifold ot the injectors from the fuel manifold.

Use new pipes from the fuel manifold to the injectors when refitting.

4. Disconnect the pipe from the injectors to the fuel recovery manifold, fuel recovery manifold side.

- Undo the nuts and disconnect the supply wiring from the heater plugs.

5. Undo the nuts (5a) and remove the air intake manifold assembly (5b).

1. Undo the bolts (1a) and remove the vacuum unit (1b) complete with O-ring.

2. Undo the bolts (2a) and remove the thermostat (2b) complete with pipe and sensors.

3. Remove the seal.

1. Undo the driven toothed pulley bolt (1a) using the tools (1b).

2. Remove the toothed driven pulley.

3. Undo the bolts (3a) and remove the cam angle sensor (3b).

4. Undo the bolts (4a) and remove the water pump (4b) complete with O-ring (4c).

1. Unscrew the glow plugs and remove.

2. Manually push the clips (2a) and disconnect the pipe from the injectors to the fuel recovery manifold (2b), injector side, and remove it.

3. Undo the nuts for the brackets fastening the injectors and the washers.

1. Remove the injectors (1a), complete with gaskets and mounting brackets (1b), using the tool (1c).

- Remove the injector bracket support pads.

- Check that the camshaft endfloat is within the recommended values using a dial gauge.

- If the camshaft endfloat is not within the recommended values, replace the worn components when reassembling the cylinder head.

1. Undo the camshaft cap bolts.

2. Remove the camshaft support lubrication pipe.

3. Remove the camshaft caps.

4. Remove the camshaft.

5. Remove the camshaft front oil seal.

6. Remove the cups complete with valve clearance adjustment pads.

- Remove the cylinder head from the vice.

- Place a suitable wooden bench between the support tools and the cylinder head to support the valves.

- Refit the cylinder head in the vice.

1. Remove the cotters (1a) using the tool (1b).

2. Remove the valve upper shim.

3. Remove the valve spring.

1. Remove the valve guide oil seal (1a) using the tool (1b).

2. Remove the lower shim.

- Carry out the same operations on the other valves.

- Remove the cylinder head from the support tools and keep the valves.

- Position the cylinder head on a special workbench.

1. Thread the special extraction tool (1b) in the valve seat (1a).

- Turn the cylinder head upsidedown on the workbench.

1. Remove the valve seat (1a) using the extraction tool (1b).

- Carry out the same operations on the other valve seats.

See in Op. 1016E14 Valve guides for single cylinder head - Replace during Op. 1016E10

- For the replacement of the valve guides

Refitting

- Clean any residues of the old gasket from the lower cylinder head plane.

- Check that the planarity of the lower cylinder head plane corresponds to the recommended values.

1. If the planarity of the lower cylinder head plane does not correspond to the recommended figures, regrind it without exceeding the minimum permitted height.

- Check that the valves do 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.

- With the valve guide fitted in the head, check that the diameter corresponds to the recommended values.

- Check that the outer diameter of the cups corresponds to the recommended figures; if not, replace the worn components.

- Check that the diameter of the cup seats corresponds to the recommended figures; if not, replace the cylinder head.

- Check that the length of the valve springs released is within the recommended values.

- Using a torque wrench, check that the spring specifications correspond to the recommended figures; if not, replace the worn components.

- Check that the diameter of the camshaft bearings corresponds to the recommended figures; if not, replace the worn camshaft.

- Check that the nominal camshaft cam lift corresponds to the recommended figures; if not, replace the worn camshaft.

1. Fit the camshaft caps (1a) on the cylinder head and tighten the bolts (1b) to the recommended torque.

2. Check that the diameter of the camshaft supports corresponds to the recommended figures; if not, replace the cylinder head.

- Check that the outer diameter of the valve seats to be fitted corresponds to the recommended figures.

1. Fit the valve seats (1a) using a suitable tool (1b).

1. Grind the valve seats to the recommended size.

- Grind the valve seats using a suitable tool.

- Temporarily fit the valves.

1. Check that the valve recess in relation to the cylinder head plane corresponds to the recommended figures using the tool fitted with a dial gauge.

- If the valve recess in relation to the cylinder head plane does not correspond to the recommended figures, regrind the valve seats once again.

- Place a suitable wooden bench between the support tools and the cylinder head to support the valves.

- Fit the cylinder head, complete with valves, on the support tools and secure it using the nuts.

- Fit the lower shim.

1. Fit the valve guide oil seals (1a) using the tools (1b) and (1c).

- Fit the valve spring.

- Fit the valve upper shim.

1. Fit the cotters (1a) using the tool (1b).

- Carry out the same operations on the other valves.

- Remove the cylinder head from the support tools.

- Remove the wooden valve support bench from the support tools.

- Refit the cylinder head on the support tools.

- Fit the cups complete with valve clearance adjustment pads.

- Fit the camshaft.

1. Fit the camshaft caps.

- Fit the camshaft bearing lubrication pipe.

2. Tighten the camshaft cap bolts to the recommended torque.

1. Fit the camshaft front oil seal (1a) using the tool (1b).

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

1. Fit the injector bracket support pads.

2. Fit the injectors (2a) complete with gaskets (2b).

3. Fit the injector brackets (3a) and tighten the nuts (3b) to the recommended torque.

4. Position the connectors for the pipe from the injectors to the fuel recovery manifold (4a) in the corresponding injector seats and insert them fully until the clip (4b) can be heard to click.

1. Fit the water pump (1a), complete with a new O-Ring (1b) and tighten the bolts (1c) to the recommended torque.

2. Fit the cam angle sensor (2a) and tighten the bolts (2b).

3. Fit the toothed driven pulley.

4. Tighten the toothed driven pulley bolt (4a) to the recommended torque using the tools (4b).

- Check that the valve clearance, with the valves closed, corresponds to the recommended figures; if not, replace the valve clearance adjustment pads following the instructions given below.

1. Lower the tappet in question using the tool.

2. Fit the tool.

- Remove the tool.

- Extract the valve clearanance adjustment plate and replace it with a one of a suitable thickness.

- Decreasing the size of the plate, increases the clearance whilst increasing it decreases the clearance.

- Remove the tool.

1. Remove the seal.

2. Fit the thermostat (2a) complete with pipes and sensors and tighten the bolts (2b) to the recommended torque.

3. Fit the thermostat (3a) complete with O-Ring and tighten the bolts (3b) to the recommended torque.

1. Remove the seal.

2. Fit the water pump rigid inlet pipe (2a) and tighten the bolts (2b).

1. Fit the intake air manifold assembly (1a) and tighten the nuts (1b).

- Position the heater plugs supply wiring and secure it using the nuts.

2. Connect the fuel return pipe for lubricating the injectors to the fuel manifold.

- Assemble new pipes from the fuel manifold to the injectors on the fuel manifold without tightening the connectors.

3. Fit the fuel distribution manifold (3a) complete with pipes and fuel pressure sensor and tighten the nuts (3b).

4. Tighten the injector side connectors to the recommended torque.

5. Tighten the connectors for the pipes from the fuel manifold to the manifold side injectors to the recommended torque.

- Remove the cylinder head from the support tools.

- Remove the cylinder head support tools from the vice and put them down.

2.0 TB

Removing

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

- Unscrew the heater plugs and remove them.

1. Disconnect the engine temperature sensor wiring.

2. Disconnect the engine coolant pipe, thermostat side.

- Disconnect the electrical connection for the cam angle sensor.

1. Undo the fixing bolts (1a) and nuts (1b) and disconnect the earth lead (1c).

1. Undo the bolts fixing the intake chamber to the manifold.

2. Disconnect the bands (2b) joining the intake chamber to the hoses connected to the intake manifold.

3. Remove the intake chamber.

1. Undo the fixing bolt (1a) and the nuts (1b) and remove the intake manifold (1c), complete with hoses (1d) connected to the intake chamber and the throttle casing.

2. Remove the seal.

1. Undo the bolts (1a) and remove the thermostat (1b).

- Remove the gasket.

1. Undo the bolt (1a) for the exhaust side timing driven pulley using the tools (1b) and (1c) for counter-torque.

2. Remove the exhaust side timing driven pulley.

3. Undo the inlet side timing driven pulley bolts (3a) using the tool (3b) for counter-torque.

4. Remove the inlet side timing driven pulley.

5. Undo the bolts (5a) and remove the side timing belt guards (5b).

1. Undo the bolt (1a) and remove the cam angle sensor (1b).

2. Undo the bolts (2a) and remove the water pump (2b) complete with O-ring (2c).

- Check that the camshaft endfloat corresponds to the recommended values using a dial gauge on a magnetic base.

- If the endfloat for the camshafts does not correspond to the recommended values, replace the worn components when reassembling the cylinder head.

1. Undo the bolts (1a) and remove the camshaft caps (1b).

2. Remove the inlet side camshaft front supper upper half-bearing.

3. Remove the camshafts.

4. Remove the camshaft front oil seals.

5. Remove the inlet side camshaft front support lower half-bearing.

1. Remove the cotters (1a) using the tools (1b), (1c), (1d), (1e) and (1f).

2. Remove the valve upper shim.

3. Remove the valve springs.

- Remove the tools used for dismantling the valves.

4. Remove the valve.

- Carry out the same operations for removing the remaining valves.

1. Remove the valve guide oil seal (1a) using the tool (1b).

2. Remove the lower valve shim.

1. Remove the valve guides (1a) using the tool (1b).

Refitting

- Clean any residues of the old gasket from the lower cylinder head plane.

- Check that the planarity of the lower cylinder head plane corresponds to the recommended values.

- If the planarity of the lower cylinder head plane does not correspond to the recommended figures, regrind it without exceeding the minimum permitted height.

- After the cylinder head has been refaced, check that the volume of the combustion chamber (with the valves and spark plugs fitted temporarily) is within the recommended values.

- If the volume of the combustion chamber does not correspond to the recommended values, remove material from inside the combustion chamber at the points shown by the arrows.

- Decarbonize the valves and check that there are no signs of grooves on the stem.

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

- Check that the puter diameter of the hydraulic tappets corresponds to the recommended figures; if not, replace the worn components.

- Check that the diameter of the hydraulic tappet housings corresponds to the recommended figures; if not, replace the cylinder head.

- Using a torque wrench, check that the valve spring specifications correspond to the recommended figures; if not, replace the worn components.

- The figures are valid for the inlet and exhaust.

- Check that the surfaces of the camshaft bearings and cams do not show signs of wear, grooves or seizing; if this is not the case, replace the camshafts.

- Check that the diameter of the camshaft bearings corresponds to the recommended figures; if not, replace the worn camshaft.

- Check that the nominal camshaft cam lift corresponds to the recommended figures; if not, replace the worn camshaft.

1. Fit the camshaft caps (1a) on the cylinder head and tighten the bolts (1b) to the recommended torque.

2. Check that the diameter of the camshaft bearings corresponds to the recommended figures; if not, replace the cylinder head.

- Check that the outer diameter of the valve guides to be fitted corresponds to the recommended figures.

1. Fit the valve guides (1a) using the tool (1b).

Before fitting the new valve guides, heat the cylinder head in the oven to a temperature of 80 - 100 °C.

- In the case of slight distortions due to fitting, ream the inner diameter of the valve guides to the recommended value.

Grind the valve seats each time the valves or the valve guides are replaced.

1. Grind the valve seat with the cutter at 44° 30'.

- Reduce the valve seat from above with the grinder at 20° and from below with the grinder at 75° until the correct valve contact band width is obtained.

- Check the valve seating; if it is not centered, make the appropriate reductions as described previously.

1. Temporarily fit the valves and the spark plugs and carry out the valve compression leakage test using tools (1a) and (1b).

- Place the lower valve shims in their housings.

1. Fit the valve guide oil seal (1a) using the tools (1b) and (1c).

1. Fit the valve (1a) and support it using the tools (1b) and (1c).

2. Place the valve springs in their housings.

3. Refit the upper valve shim.

4. Place the cotters (4a) in their housings using the tools (4b), (4c) and (4d).

- Carry out the same operations for refitting the remaining valves.

- Remove the tools used for refitting the valves.

- Place the inlet side camshaft front support lower half-bearing in its housing.

- Place the camshafts in their housings.

- Place the inlet side camshaft front support upper half-bearing in its housing.

1. - Place the camshaft caps (1a) in their housings and secure them tightening the bolts (1b) to the recommended torque.

2. Position the water pump (2a), complete with O-ring (2b), in its housing and secure it tightening the bolts (2c) to the recommended torque.

- Place the cam angle sensor back in its housing and secure it tightening the bolts to the recommended torque.

1. Fit the exhaust side camshaft front oil seal (1a) using the tool (1b).

1. Fit the inlet side camshaft front oil seal (1a) using the tool (1b).

- Place the timing belt side guards in their housings and secure them using the bolts.

1. Place the inlet side timing driven pulley in its housing.

2. Tighten the bolts (2a) for the inlet side toothed timing driven pulley using tool (2b) for counter-torque.

3. Place the exhaust side timing driven pulley in its housing.

4. Tighten the bolt (4a) for the exhaust side toothed timing driven pulley using the tools (4b) and (4c) for counter-torque.

- Place the thermostat complete with gasket back in its housing and secure it tightening the bolts to the recommended torque.

- Place the intake manifold gasket in its housing.

- Place the intake manifold complete with modular intake manifold and throttle casing back in its housing, then secure it tightening the nuts to the recommended torque.

- Connect the electrical connection for the cam angle sensor.

- Connect the earth lead to the cylinder head.

- Connect the coolant return pipe to the engine coolant reservoir, thermostat side.

- Connect the electrical connection to the engine coolant temperature sensor.

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

- Remove the cylinder head from the vice and place it in the housing on the support tool.

2.4 20V

Removing

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

- Unscrew the heater plugs and remove them.

1. Disconnect the electrical connection from the engine coolant temperature sensor.

2. Disconnect the coolant return pipe from the engine coolant reservoir, thermostat side.

1. Disconnect the earth lead from the cylinder head.

2. Disconnect the electrical connection for the cam angle sensor.

3. Undo the nuts (3a) and remove the intake manifold (3b) complete with modular intake manifold (3c) and throttle casing (3d).

- Remove the intake manifold gasket.

1. Undo the bolts (1a) and remove the thermostat (1b).

- Remove the gasket.

1. Undo the bolt (1a) for the exhaust side timing driven pulley using the tools (1b) and (1c) for counter-torque.

2. Remove the exhaust side timing driven pulley.

3. Undo the inlet side timing driven pulley bolts (3a) using the tool (3b) for counter-torque.

4. Remove the inlet side timing driven pulley.

5. Undo the bolts (5a) and remove the side timing belt guards (5b).

1. Undo the bolt (1a) and remove the cam angle sensor (1b).

2. Undo the bolts (2a) and remove the water pump (2b) complete with O-ring (2c).

- Check that the camshaft endfloat corresponds to the recommended values using a dial gauge on a magnetic base.

- If the endfloat for the camshafts does not correspond to the recommended values, replace the worn components when reassembling the cylinder head.

1. Undo the bolts (1a) and remove the camshaft caps (1b).

2. Remove the inlet side camshaft front supper upper half-bearing.

3. Remove the camshafts.

4. Remove the camshaft front oil seals.

5. Remove the inlet side camshaft front support lower half-bearing.

1. Remove the cotters (1a) using the tools (1b), (1c), (1d), (1e) and (1f).

2. Remove the valve upper shim.

3. Remove the valve springs.

- Remove the tools used for dismantling the valves.

4. Remove the valve.

- Carry out the same operations for removing the remaining valves.

1. Remove the valve guide oil seal (1a) using the tool (1b).

2. Remove the lower valve shim.

1. Remove the valve guides (1a) using the tool (1b).

Refitting

- Clean any residues of the old gasket from the lower cylinder head plane.

- Check that the planarity of the lower cylinder head plane corresponds to the recommended values.

- If the planarity of the lower cylinder head plane does not correspond to the recommended figures, regrind it without exceeding the minimum permitted height.

- After the cylinder head has been refaced, check that the volume of the combustion chamber (with the valves and spark plugs fitted temporarily) is within the recommended values.

- If the volume of the combustion chamber does not correspond to the recommended values, remove material from inside the combustion chamber at the points shown by the arrows.

- Decarbonize the valves and check that there are no signs of grooves on the stem.

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

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

the valve guide diameter should be checked with the guide fitted on the head.

- Check that the puter diameter of the hydraulic tappets corresponds to the recommended figures; if not, replace the worn components.

- Check that the diameter of the hydraulic tappet housings corresponds to the recommended figures; if not, replace the cylinder head.

- Using a torque wrench, check that the valve spring specifications correspond to the recommended figures; if not, replace the worn components.

- Check that the surfaces of the camshaft bearings and cams do not show signs of wear, grooves or seizing; if this is not the case, replace the camshafts.

- Check that the diameter of the camshaft bearings corresponds to the recommended figures; if not, replace the worn camshaft.

- Check that the nominal camshaft cam lift corresponds to the recommended figures; if not, replace the worn camshaft.

1. Fit the camshaft caps (1a) on the cylinder head and tighten the bolts (1b) to the recommended torque.

2. Check that the diameter of the camshaft bearings corresponds to the recommended figures; if not, replace the cylinder head.

- Check that the outer diameter of the valve guides to be fitted corresponds to the recommended figures.

1. Fit the valve guides (1a) using the tool (1b).

Before fitting the new valve guides, heat the cylinder head in the oven to a temperature of 80 - 100 °C.

- In the case of slight distortions due to fitting, ream the inner diameter of the valve guides to the recommended value.

Grind the valve seats each time the valves or the valve guides are replaced.

1. Grind the valve seat with the cutter at 44° 30'.

- Reduce the valve seat from above with the grinder at 20° and from below with the grinder at 75° until the correct valve contact band width is obtained.

- Check the valve seating; if it is not centered, make the appropriate reductions as described previously.

1. Temporarily fit the valves and the spark plugs and carry out the valve compression leakage test using tools (1a) and (1b).

- Place the lower valve shims in their housings.

1. Fit the valve guide oil seal (1a) using the tools (1b) and (1c).

1. Fit the valve (1a) and support it using the tools (1b) and (1c).

2. Place the valve springs in their housings.

3. Refit the upper valve shim.

4. Place the cotters (4a) in their housings using the tools (4b), (4c) and (4d).

- Carry out the same operations for refitting the remaining valves.

- Remove the tools used for refitting the valves.

- Place the inlet side camshaft front support lower half-bearing in its housing.

- Place the camshafts in their housings.

- Place the inlet side camshaft front support upper half-bearing in its housing.

1. - Place the camshaft caps (1a) in their housings and secure them tightening the bolts (1b) to the recommended torque.

2. Position the water pump (2a), complete with O-ring (2b), in its housing and secure it tightening the bolts (2c) to the recommended torque.

- Place the cam angle sensor back in its housing and secure it tightening the bolts to the recommended torque.

1. Fit the exhaust side camshaft front oil seal (1a) using the tool (1b).

1. Fit the inlet side camshaft front oil seal (1a) using the tool (1b).

- Place the timing belt side guards in their housings and secure them using the bolts.

1. Place the inlet side timing driven pulley in its housing.

2. Tighten the bolts (2a) for the inlet side toothed timing driven pulley using tool (2b) for counter-torque.

3. Place the exhaust side timing driven pulley in its housing.

4. Tighten the bolt (4a) for the exhaust side toothed timing driven pulley using the tools (4b) and (4c) for counter-torque.

- Place the thermostat complete with gasket back in its housing and secure it tightening the bolts to the recommended torque.

- Place the intake manifold gasket in its housing.

- Place the intake manifold complete with modular intake manifold and throttle casing back in its housing, then secure it tightening the nuts to the recommended torque.

- Connect the electrical connection for the cam angle sensor.

- Connect the earth lead to the cylinder head.

- Connect the coolant return pipe to the engine coolant reservoir, thermostat side.

- Connect the electrical connection to the engine coolant temperature sensor.

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

- Remove the cylinder head from the vice and place it in the housing on the support tool.

2.4 JTD 20V

1. Position the camshaft housing (1a) in a vice using the tool (1b).

1. Undo the bolt (1a) and remove the cam angle sensor (1b).

- Check that the camshaft endfloat is within the recommended values using a dial gauge.

- If the camshaft endfloat is not within the recommended values, replace the worn components when reassembling the cylinder head.

1. Remove the plugs (1a) and fit the camshaft timingn tools (1b) on the camshaft housing.

Check that the tools marked with the letter "A" are correctly inserted in the housings in the camshafts.

1. Undo the bolts fixing the camshaft gears.

- Remove the camshaft timing tools from the camshaft housing.

1. Release the camshafts (1a), as necessary and remove the camshaft gears (1b).

1. Using a suitable drift, extract the inlet side camshaft (1a) and plug (1b).

2. Using a suitable drift, extract the exhaust side camshaft (2a) and oil seal (2b).

- Remove the exhaust side camshaft oil seal.

1. Undo and remove the engine oil lubrication duct plugs.

- Remove the support ool complete with camshaft housing from the vice and separate them.

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

- Remove the gasket.

1. Fit a suitable wooden stand on the cylinder head plane to support the valves and secure it using bolts.

1. Compress the valve spring using the tools (1a) and (1b) and remove the cotters (1c).

2. Remove shim (2a) and valve spring (2b).

3. Remove the valve guide seat oil seal using special pliers.

- Carry out the same operations on the other valves.

- Remove the wooden stand and keep the valves.

- Remove the cylinder head from the support tool.

- Replace the valve guides following the instructions in the description:

See in Op. 1016E14 VALVE GUIDES for single cylinder head - Replace during Op. 1016E10

- Clean any residues of the old gasket from the lower cylinder head plane.

- Check that the planarity of the cylinder head is within the recommended limits.

1. If the planarity of the lower cylinder head plane does not correspond to the recommended figures, regrind it without exceeding the minimum permitted height.

- Check that the valves do 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.

- Check that the length of the valve springs released is within the recommended values.

- Using a torque wrench, check that the spring specifications correspond to the recommended figures; if not, replace the worn springs.

- Check that the diameter of the camshaft bearings corresponds to the recommended figures; if not, replace the worn camshaft.

- Check that the nominal camshaft cam lift corresponds to the recommended figures; if not, replace the worn camshaft.

1. Check that the diameter of the camshaft bearings corresponds to the recommended figures; if not, replace the single camshaft housing.

- Check that the outer diameter of the valve seats corresponds to the recommended figures.

1. If the values are not within the recommended limits, reface the valve seats.

- Grind the valve seats using a suitable tool.

- Temporarily fit the valves.

1. Check that the valve projection or recess in relation to the cylinder head plane (1a) corresponds to the recommended figures using the tool (1b) fitted with a dial gauge.

- If the values measured are not within the recommended limits, reface the valve seats once again.

- Position the cylinder head in the vice using the tool.

- Fit the valves in the seats, then support them using the wooden stand and secure it using suitable bolts.

1. Fit the fittingn tool (1a) on the valve stem, fit an oil seal (1b) and fit the oil seal in the end of travel position using a suitable drift.

- Carry out the same operations on the other valves.

1. Fit the valve spring in its seat.

2. Fit the upper valve shim in its seat.

3. Compress the valve spring using the tools (3a) and (3b) and fit the cotters (3c) in their seats.

- Carry out the same operations on the other valves.

- Remove the wooden stand for supporting the valves from the cylinder head plane.

- Remove the cylinder head from the support tool.

1. Position the camshaft housing (1a) in a vice using the tool (1b).

- Tighten the engine oil lubrication duct plugs.

- Place the camshafts in their housings.

- Place the camshaft caps in their housings and secure them without tightening the bolts.

1. Fit the camshaft timing tools.

Check that the tools marked with the letter "A" are correctly fitted in the housings in the camshafts.

1. Tighten the camshaft gear fixing bolts to the recommended torque.

1. Fit the exhaust side camshaft front oil seal (1a) using the tool (1b).

- Fit the inlet side camshaft plug.

1. Position the cam angle sensor (1a) in its housing and secure it tightening the bolt (1b) to the recommended torque.

1. Remove the camshaft timing tools (1a) and tighten the plugs (1b).

- Remove the support ool complete with camshaft housing from the vice and separate them.