To remove the
Timing Belt, first, take off the spark plug leads (or ignition coils) and rocker cover. Then, remove the timing belt. Depending on your model type, either remove the distributor assembly (for 1.5 litre models) or the camshaft position sensor (for all other models). Subsequently, remove the camshaft sprocket, the
Rocker Arms and shafts and withdraw the camshaft from the
Cylinder Head, being careful not to cause any damage to the bearing running surfaces by the cam lobes. Make a note of how far the oil seal is installed, then gently lever the oil seal out of the front of the head. Clean and dry the camshaft thoroughly to inspect the lobes, journals and thrust faces for pitting and wear. If necessary, measure with a micrometer and renew if excessive wear is found on the camshaft. Moreover, inspect the cylinder head's bearing running surfaces for damage or overheating, renewing the head or consulting a specialist if you notice problems. If you suspect bearing wear, the bearing journals and bores should be measured in order to determine their oil clearance. This clearance should then be compared with specifications and you should consult a specialist who will recommend renewal or just further inspection of the component, which could include the bearings. To install the assembly, follow the disassembly procedure in reverse order. Ensure to coat all journals and cam lobes with clean engine oil. Carefully position the shaft in the cylinder head, avoiding damage to the bearing surfaces and oil seal. To the noted depth, install the new camshaft oil seal such that the seal lips face inwards, are square and lubricated with multipurpose grease. After that, fit the rocker arms and shafts, timing belt and distributor or camshaft position sensor, spark plugs and leads, rocker cover, following the reverse procedure.