Rear crankshaft oil seal
1. To perform this procedure, the gearbox must be removed from the vehicle (see chapter 7A or 7B). Remove the flywheel/faceplate as described in paragraph 14.
2. The rear crankshaft oil seal can be replaced without removing the oil pan and oil seal housing, however, this method is not recommended, as removing and installing the oil seal can cause damage to the crankshaft and the oil seal seat, as well as damage to the oil seal itself. If you want to try, gently pry the seal with a screwdriver and pull it out of the mounting hole (see Figure 15.2).
Figure 15.2. Carefully pry the old seal with a screwdriver and pull it out of the mounting hole.
Wipe the seal seat clean and use sandpaper to remove any burrs that could cause premature damage. Lubricate the working lips of the new oil seal and the crankshaft journal with multi-purpose grease. Carefully place the oil seal onto the crankshaft with the working edges facing inward. Using a piece of metal pipe or a suitable head with an outside diameter slightly smaller than the diameter of the mounting hole, use it as a mandrel and evenly press the seal into the mounting hole to the depth noted during removal. Be careful - the working lip of the oil seal is very hard and can be easily damaged during installation. Wash off all traces of oil. Install the flywheel/faceplate as described in paragraph 14.
3. The next method is much preferable, but when using it, you need to remove the engine oil pan (see paragraph 12) and the seal housing.
4. After removing the oil pan from the engine cylinder block, unscrew the oil seal housing mounting bolts and remove the housing. Remove all traces of the old gasket.
5. Place the oil seal housing on wooden blocks and use a screwdriver and hammer to knock out the old oil seal from the back side (see Figure 15.5).
Figure 15.5. Place the housing together with the seal on wooden blocks and knock out the seal from the inside.
6. Press the new oil seal into the housing using a wooden block or a piece of pipe whose outside diameter is slightly smaller than the outside diameter of the oil seal (see Figure 15.6).
Figure 15.6. Press the new seal into the housing using a wooden block or a piece of pipe of the appropriate diameter.
Be careful not to damage the seal in the mounting hole during installation.
7. Lubricate the crankshaft journal and the working lip of the oil seal with multi-purpose grease. Place the new gasket on the cylinder block.
8. Slowly and carefully place the oil seal onto the crankshaft journal, using a smooth object such as a ratchet extension.
9. Tighten the bolts to the torque specified in Specifications. The lower edge of the mating flange of the gland housing must not protrude beyond the edge of the mating flange (pallet guide) block.
10. All subsequent operations are performed in the reverse order of removal.