Replacing the front crankshaft oil seal
If you find traces of oil leakage through the crankshaft oil seals, first check to see if the crankcase ventilation system is clogged and if its hoses are pinched, and repair if necessary.
If the oil leak does not stop, replace the seals.
A sign that the front crankshaft oil seal needs to be replaced is oil leaking through its lip.
In this case, oil is sprayed out by the rotating crankshaft pulley, as a result of which the entire front part of the engine and the timing belt become oily.
Disconnect the wire from the negative terminal of the battery.
Install the piston of the 1st cylinder to the TDC position of the compression stroke (see “Installing the piston of the 1st cylinder to the TDC position of the compression stroke”).
Remove the timing belt (see “Replacing the Timing Belt and Tensioner Pulley”).
Using two screwdrivers, remove the crankshaft toothed pulley.
Remove the key from the groove of the crankshaft shank.
Using a screwdriver, remove the oil seal from the oil pump cover.
Lubricate the working edge of the new oil seal with engine oil, install it in the oil pump cover, oriented with the working edge towards the inside of the engine, and press the oil seal into the pump cover until it stops using a mandrel.
As a mandrel, you can use a head of a suitable size from the tool kit.
Install all removed parts and assemblies of the gas distribution mechanism in the reverse order of removal.
Adjust the tension of the timing belts and the generator drive belt
Replacing the rear crankshaft oil seal
The reason for oily clutch discs may be a leak in the gearbox input shaft oil seal or the rear crankshaft oil seal.
Engine and transmission oils differ in smell.
With a certain skill, you can use it to determine which of the seals is defective.
Helpful advice There is another way to determine the type of oil.
Drop the oil into a thin layer of water poured into a container.
Gear oil will spread over the entire surface of the water in the form of a rainbow film, and motor oil will remain in the form of a drop, similar to a grain of lentil.
You will need: a screwdriver with a straight blade, a mandrel.
Remove the gearbox.
Remove the clutch.
Remove the flywheel
Inspect the oil seal. If it has lost its tightness, oil leakage will be visible in its lower part.
Use a screwdriver to remove the oil seal.
Lubricate the working edge of the new oil seal with engine oil, install it in the cylinder block socket, oriented the working edge towards the inside of the engine, and carefully tuck the working edge onto the crankshaft journal.
Press the oil seal into the socket until it stops, using a suitable mandrel.
You can use an old oil seal.
Install the removed components in the reverse order of removal.
Note When installing the flywheel, lubricate the threads the side of the bolts for fastening it with Loctite thread locking compound or any similar anaerobic thread locker.