Disassembly
1. Remove the camshaft housing from the cylinder head as described in Chapter 18, proceed as follows.
2. Remove the distributor and associated components as described in Section 5 and, on C16NZ2, 1.8 and 2.0 liter engines, carefully remove the rear camshaft oil seal with a screwdriver.
3. On carbureted models, remove the fuel lift pump using the following instructions: Section 4A, if necessary.
4. Working at the distributor end of the camshaft, remove the two camshaft retaining plate mounting bolts using a socket wrench (see illustration).
5. Remove the retaining plate, noting its orientation (see illustration).
6. Carefully remove the camshaft from the housing through the side on which the distributor is installed, being careful not to damage the bearing journals (see illustration).
Inspection
7. After removing the camshaft, check the condition of the bearings in the camshaft housing. If any damage is found, the camshaft housing must be replaced.
8. The camshaft should not have any marks or scratches on the cam surfaces or journals. If such damage is found, replace the camshaft. Please note that when replacing the camshaft, all rocker arms will also need to be replaced.
9. Check the condition of the camshaft retaining plate, replace if damaged.
10. If the camshaft has been removed, it is always recommended to replace the front camshaft oil seal. Remove the old seal with a screwdriver (see illustration).
Assembly
11. Carefully tap the new front oil seal into place using a socket or pipe. On C16NZ2, 1.8 and 2.0 liter models, install the new rear camshaft oil seal. On other models, replace the distributor O-ring (see illustrations).
12. Before assembly, generously lubricate the bearings in the housing and the sealing lip of the oil seal. Carefully insert the camshaft into the housing from the distributor side, making sure that the bearing is not damaged.
13. Install the retaining plate, tighten the mounting bolts (see illustration). Check the camshaft end play by inserting a feeler gauge between the locking plate and the camshaft end play flange. If the end play exceeds the specified limit, replace the locking plate.
14. Where applicable, install the fuel lift pump in accordance with Section 4A, if necessary.
15. Install the distributor as described in Section 5.
16. Install the camshaft housing as described in Chapter 18.
17. If a new camshaft is installed, it is important to follow the following break-in schedule: (unless otherwise specified by the manufacturer) immediately after the first engine start:
- One minute at 2000 rpm
- One minute at 1500 rpm
- One minute at 3000 rpm
- One minute at 2000 rpm
18. Don't change your engine oil (except filter if necessary) approximately 1000 km after installing a new camshaft.
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