Attention: The front oil seal, camshaft is replaced without removing the engine only if the internal elements of the cylinder head are in good condition.
Secure the vehicle from moving by tightening the parking brake lever or support the vehicle's wheels with blocks.
Remove front cover (1) camshaft timing belt.
Turning the camshaft, align the timing marks of the crankshaft pulley.
Timing mark for camshaft gear on 2.0 liter engines
unscrewing the bolt (1) tension roller (A), loosen the toothed belt tension.
Having fixed the camshaft gear from turning, unscrew the gear wheel mounting bolt.
Remove the keyed gear.
Carefully remove the old oil seal using a special tool, a screwdriver, or by screwing a screw into it. Do not scrape the oil seal hole, otherwise the camshaft will be damaged in the process (if the camshaft is damaged, a new seal will not stop the leak).
Clean the oil seal bore and coat the outside of the new oil seal with engine oil or multi-purpose grease, using a socket wrench slightly smaller than the outside diameter of the oil seal, carefully drive the oil seal fully into place with a hammer. If you do not have a socket wrench, you can use a piece of tubing of the appropriate diameter.
Check the stuffing box after installation to make sure that the stuffing box spring has not popped out.
Put on the belt, check the coincidence of the alignment marks of the toothed belt, adjust the belt tension.
Reinstall the cover.
Let the engine run and check for leaks.