Removal
1. Disconnect the negative battery terminal and remove the cylinder head cover.
1.6 liter engine models
2. Remove the camshaft pulley.
3. Remove the ignition coil.
4. Remove the upper bolt securing the thermostat housing to the left front end of the cylinder head.
5. Carefully remove the oil supply tube to the upper camshaft bearing covers. Pay attention to the O-rings installed in each connection of the pipeline.
6. The camshaft bearing caps are numbered 1 through 5, with cap #1 being on the transmission side. If the caps are not numbered, number them. Also note the position of each cap.
7. Loosen the camshaft bearing cap nuts gradually and evenly. Once the valve spring pressure is released, unscrew the nuts completely.
8. Remove the bearing caps.
9. Remove the camshaft from the cylinder head and the seal ring from the camshaft.
10. Using a rubber suction cup, remove the tappets and place them in a suitable container so that they can be reinstalled in their proper positions after assembly. If necessary, the adjusting shim can be removed from the top of the valve stem and stored with the appropriate tappet.
Engine models 1.8 and 2.0 liters
11. Remove both cylinder head covers.
12. Remove both pulleys from the camshafts together with the hubs, as well as the timing belt tensioner pulley.
13. Remove the upper inner timing belt cover.
14. Evenly and gradually unscrew the twelve bolts securing the camshaft bearings to the cylinder head. Remove the bolts and remove the bearing housings.
15. Since both camshafts are identical, it is necessary to mark the camshaft that controls the intake valves and the camshaft that controls the exhaust valves before removing them.
16. Remove the camshafts and remove the sealing rings from the camshafts.
17. Using a rubber suction cup, remove the hydraulic lifters and place them in a suitable container so that they can be installed in their proper places after assembly.
Examination
1. Check the condition of the working surfaces of the camshaft bearings and cams for wear. If there is any wear on the camshaft, it must be replaced. Check the condition of the working surfaces of the camshaft bearings in the cylinder head. If the working surfaces of the bearings are worn, the cylinder head must be replaced.
2. Check the condition of the tappets. If the tappets show wear from the camshaft lobes, the tappet must be replaced (possibly together with the camshaft).
Installation
1.6 liter engine models
1. Install the adjusting shims on top of the valve stem. Do not swap the adjusting shims under any circumstances, as this will result in a violation of the valve clearance value.
2. Lubricate the tappets with engine oil and install the cylinder head, making sure that the tappets return to their original positions.
3. Lubricate the camshaft lobes with engine oil, then install the camshaft into the cylinder head. Temporarily install the pulley onto the camshaft and align the locating holes in the pulley with the hole in the cylinder head. Check that the locating rod locks the flywheel pulley.
4. Check that the bearing caps are thoroughly cleaned. Install the bearing caps using the marks made earlier.
5. Evenly and gradually (each time 1 turn) tighten the camshaft bearing caps until they touch the cylinder head. Then, in a spiral pattern, tighten all the nuts to the required torque.
6. Check the connection points of the oil supply line to the camshaft bearings, as well as the O-rings for wear, and replace them if necessary. Lubricate the O-rings with engine oil and install the pipeline carefully.
7. Check the condition of the sealing ring and replace if necessary. Install the upper mounting bolt to the thermostat housing and tighten it to the specified torque.
8. Install the ignition coil.
9. Install a new camshaft seal ring and camshaft pulley.
10. Check the valve clearances.
11. Install the cylinder head cover and connect the negative terminal to the battery.
Engine models 1.8 and 2.0 liters
12. Clean the camshaft bearing housings thoroughly.
13. Lubricate the hydraulic lifters with engine oil and install them in their places. Check that each lifter turns freely in the bore.
14. Lubricate the bearings and camshaft lobes with engine oil and install the camshafts into the head as follows:
Source can be seen at: PEUGEOTBOOK
- 1.8 liter engine models: the exhaust camshaft groove should be at the 12 o'clock position and the intake camshaft groove should be at the 11 o'clock position;
- 2.0L engine models: The exhaust camshaft groove should be at the 3 o'clock position and the intake camshaft groove should be at the 11 o'clock position.
15. Check that the guide pins are in place, i.e. in each corner of the cylinder head.
16. Lubricate the gasket areas and mounting bolt holes with silicone grease.
17. Lubricate the camshaft bearings with engine oil and install the bearing housings onto the camshafts. Install the mounting bolts.
18. Tighten the bearing housing mounting bolts in two stages, sequentially and gradually, in a specific order.
19. Install the upper inner timing belt cover.
20. Install the timing belt tensioner pulley.
21. Install the cylinder head cover.
22. Install new O-rings, hubs and camshaft pulleys.