1. Remove the timing belt and crankshaft gear (see Section Removing, checking the condition and installing the gas distribution belt and timing gears).
2. Gently prying with a special tool or a large screwdriver, remove the old oil seal from its seat. Try not to leave scratches and scuffs on the surface of the shaft pin or the walls of the seat, - the presence of such defects will lead to a quick failure of the new stuffing box.
3. Clean the inside surfaces of the seat. Lightly lubricate the outer edge of the new oil seal with clean engine oil, fill the lips of the oil seal with universal grease.
4. Using a socket of the appropriate size as a mandrel, or a piece of pipe of a suitable diameter, seat a new oil seal in its seat (the mandrel should rest only on the hard outer edge of the end face of the stuffing box) to the same depth as the old one was sunk. After seating the oil seal, make sure that the spacer spring does not pop out of its groove.
5. Reinstall the crankshaft gear and timing belt (see Section Removing, checking the condition and installing the gas distribution belt and timing gears).
6. Start the engine and check for signs of oil leaks around the front oil seal seat.