Contents: Removal ↡ Installation ↡
Caution: When installing the upper timing chain cover, it is necessary to use sealant and new gaskets.
Removal
Unscrewing the distributor cap mounting bolts on models with the CIS fuel injection system
Removal the ignition distributor rotor
Unscrewing the distributor rotor mounting bolt
Removal the protective screen on models with the CIS fuel injection system
Unscrewing the plastic shield on models with the CIS fuel injection system
Removal the O-ring round section
After disconnecting the coolant pipe from the water pump, remove the O-ring from the pipe.
Disconnecting the electrical connector from the camshaft position sensor
Removal the camshaft position sensor that controls the intake valves on models with the CIS fuel injection system
Removal the bolt securing the auxiliary drive belt tensioner stand to the drive chain cover on CIS fuel injection models
Removal the upper timing chain cover mounting bolts on CIS fuel injection models
Unscrew the two bolts securing the drive chain cover, which also secure the engine mount
Removal the upper drive chain cover
1. Remove the ground cable from the battery.
2. Drain the coolant from the cooling system.
3. Remove the cylinder head cover.
4. Disconnect the central high-tension wire from the distributor cap.
5. Unscrew the mounting bolts and remove the distributor cap (see fig. Unscrewing the distributor cap mounting bolts on models with the CIS fuel injection system). Move the distributor cap to the side without disconnecting the remaining high-voltage wires from it.
6. Unscrew the screws and remove the distributor rotor (see fig. Removing the ignition distributor rotor).
7. Unscrew the central bolt and remove the distributor rotor drive (see fig. Unscrewing the distributor rotor mounting bolt).
8. Remove the protective screen and seal from the upper drive chain cover (see fig. Removing the protective screen on models with the CIS fuel injection system).
9. Remove the upper chain guide.
10. Remove the high-tension wire and unscrew the plastic shield from the base of the upper drive chain cover (see fig. Unscrewing the plastic shield on models with the CIS fuel injection system).
11. Remove the bolts securing the coolant supply pipe to the radiator fan and water pump. Disconnect the pipe from the water pump and move it to the side (see Fig. Removing the O-ring).
12. Disconnect the electrical connector from the camshaft position sensor and the camshaft adjuster relay that controls the intake valves (see fig. Disconnecting the electrical connector from the camshaft position sensor, Removing the camshaft position sensor that controls the intake valves on models with the CIS fuel injection system).
13. Unscrew the auxiliary drive belt idler pulley.
14. Remove the bolt securing the high tension wire bracket to the lower drive chain cover.
15. From the top cover of the drive chain, unscrew the plug located under the camshaft that controls the intake valves.
16. Remove the nut and bolt securing the brake booster vacuum hose bracket to the front engine mount.
17. Remove the bolt securing the auxiliary drive belt tensioner rod to the drive chain cover (see Fig. Removing the bolt securing the auxiliary drive belt tensioner stand to the drive chain cover on CIS fuel injection models). Mark the location of the washers and spacers for proper reinstallation.
18. On models with a coolant elbow mounted in the center of the upper timing chain cover, disconnect the hose from the elbow, remove the bolts and remove the elbow.
19. Remove the upper chain cover mounting bolts. Keep in mind that the lower right bolt remains in the cover. The two bolts that secure the upper chain cover also secure the front engine mount (see fig. Unscrewing the upper timing chain cover mounting bolts on CIS fuel injection models, Unscrewing the two timing chain cover mounting bolts that also secure the engine support).
20. Remove the upper timing chain cover together with the lower right bolt (see Fig. Removing the upper cover of the drive chain).
21. Remove the gasket from the groove at the top of the lower timing chain cover.
Installation
Installing a new camshaft seal ring that controls the exhaust valves
Installing a new gasket into the groove of the lower drive chain cover
1. Clean the mating surfaces of the upper timing chain cover and cylinder head.
2. Replace the camshaft O-ring that controls the exhaust valves located in the drive chain cover (see Fig. Installing a new camshaft sealing ring that controls the exhaust valves).
3. Measure the installation depth of the O-ring, then use a screwdriver blade to remove the O-ring from the upper timing chain cover.
4. Clean the O-ring seat in the upper timing chain cover.
5. Using a tubular mandrel of the appropriate diameter, install the new O-ring into the seat to the previously measured depth.
6. To avoid damaging the sealing edges of the O-ring when installing the timing chain cover, wrap the front end of the exhaust camshaft with adhesive tape.
7. Apply a bead of sealant to the joint where the top of the lower timing chain cover meets the cylinder head.
8. Install a new gasket into the groove on the top of the lower timing chain cover. Lubricate the top side of the gasket (see Fig. Installing a new gasket into the groove of the lower drive chain cover).
9. Apply a thin layer of sealant to the mating surfaces of the cylinder head and upper timing chain cover.
10. Install the lower right bolt into the timing chain cover, then install the cover onto the cylinder head.
11. Install the remaining cover mounting bolts and tighten them evenly and gradually to the specified torque, starting with the bottom bolts.
12. Remove the adhesive tape from the front end of the camshaft that controls the exhaust valves.
13. Further installation is carried out in the reverse order of removal. Fill the cooling system with coolant.