A sign of the need to replace the front crankshaft oil seal is an oil leak through its edge. In this case, the oil is sprayed by the rotating crankshaft pulley, as a result of which the entire front of the engine and the timing belt are oiled.
You will need: all the tools needed to remove the timing gear (see «Replacing the timing belt and its tension roller»), rear cover of the gas distribution mechanism drive (see «Removal and installation of the oil pump»), cylinder head cover (see «Replacing the cylinder head cover gasket»), as well as a screwdriver, a hammer.
To replace the front crankshaft oil seal, do the following.
1. Disconnect the wire from the terminal «minus» battery.
2. Set the piston of the 1st cylinder to the TDC position of the compression stroke (see «Setting the piston of the first cylinder to the TDC position of the compression stroke»).
3. Remove the timing belt (see «Replacing the belt, timing gear drive and its tension roller»).
4. Remove the rear timing cover (see «Removal and installation of the oil pump»).
5. Using a screwdriver, remove the oil seal from the oil pump cover.
6. Lubricate the working edge of the new oil seal with engine oil and install it in the oil pump cover, orienting the working edge inside the engine.
7. Press the stuffing box into the pump cover until it stops using a mandrel. As a mandrel, you can use a suitable size head from the tool kit or an old oil seal.
8. Install all removed parts and components of the gas distribution mechanism in the reverse order of removal.
The reason for oiling the clutch discs may be a leak in the gearbox input shaft oil seal or the crankshaft rear oil seal.
Engine and transmission oils have a different smell, so with a certain skill it can be used to determine which of the oil seals is defective.
Helpful Hint: There is another way to determine the type of oil. Drop oil into water poured into a vessel in a thin layer (maybe in a puddle). Gear oil will spread over the entire surface of the water in the form of an iridescent film, and engine oil will remain in the form of a drop similar to a lentil grain.
Follow the steps below to replace the rear oil seal.
1. Remove the gearbox (cm «Removal and installation of a manual transmission»).
2. Remove the clutch (see «Removal and installation of clutch»).
3. Remove the flywheel (see «Removal, troubleshooting and installation of the flywheel»).
4. Inspect the oil seal: if it has lost its tightness, an oil drip will be visible in its lower part.
5. Using a screwdriver, remove the gland.
6. Lubricate the working lip of the new oil seal with engine oil...
7.... install it in the seat of the cylinder block, orienting the working edge inside the engine, and carefully fill the working edge on the crankshaft journal.
8. Press the oil seal into the seat until it stops, using a mandrel or the old oil seal as a mandrel.
9. Install the removed units in the reverse order of removal.
Note: When installing the flywheel, lubricate the threaded part of the flywheel mounting bolts with Loctite threadlocker or similar.