We change the oil seal if there are traces of engine oil under the camshaft pulley or on the timing belt.
If an oil leak is detected through the camshaft oil seal, we recommend replacing the timing belt, since oil that has got on the belt and toothed pulleys of the camshaft and crankshaft will lead to a quick failure of the belt.
Before installing a new belt, carefully wipe the pulleys with a rag soaked in gasoline.
Removing the timing belt (see Checking the condition and replacing the timing belt).
With the "17" head, we unscrew the bolt securing the camshaft pulley, holding the pulley from turning with the "10" head with an extension, put on the bolt of the rear timing cover..
... and remove the pulley.
Using a screwdriver, pry the oil seal out of the cylinder head seat. After applying a thin layer of engine oil to the working edge of the new oil seal, we put a new oil seal on the camshaft toe.
We press in the gland using a tool head or a piece of pipe of a suitable size.
Install the camshaft pulley so that the pin on the toe of the camshaft enters the hole on the pulley.
The subsequent assembly is carried out in the reverse order. Adjusting the timing belt tension (see Checking the condition and replacing the timing belt»).