Disassembling the engine for overhaul.
Usually, an overhaul of the engine is required with a large motor resource, with a decrease in oil pressure and a decrease in compression in the engine cylinders
Removing attachments of the engine, the removal of which we will consider in separate articles.
Removing the generator, starter, block head cylinders, water pump, upper clutch housing cover.
With a key or a 10 head, we unscrew the sixteen bolts of the pallet
Remove the oil pan along with the gasket
We unscrew the two bolts securing the oil receiver to the cover of the crankshaft support
Unscrew the bolt to the oil pump
Remove the receiver tube from the oil pump and remove the oil receiver
If the O-ring is damaged, it must be changed
Pry off the toothed pulley with two screwdrivers
Remove the toothed pulley from the toe of the crankshaft
We unscrew the six bolts of the oil pump
Remove the oil pump
With a ring wrench or a 13 head, we unscrew the two bolts securing the generator bar and the bracket of the right engine mount
Remove the generator mounting bar
Remove the lower bolt of the right support
With a 15 head, unscrew the three bolts securing the generator bracket
Remove the right support bracket
Remove the generator bracket
Using a 10 wrench or a head, unscrew the two bolts securing the inlet pipe of the coolant pump
Remove the pipe and gasket
With a key or a 10 head, we unscrew the six bolts of the crankshaft rear oil seal holder
Remove the holder and gasket
With a head of 14, unscrew the nuts securing the connecting rod cover
Remove the connecting rod cover
Remove the bearing shell from the cover
With the wooden handle of the hammer we rest against the connecting rod and push the piston
On the other hand, we take out the piston with rings from the cylinder.
In the same way, we take out the other three pistons.
With special tongs, we unclench and remove the rings from the pistons.
If there are no tongs, then gently open the locks with your fingers and remove the compression rings one by one
Also remove the oil scraper ring
Remove the ring expander.
If the oil scraper ring is with discs, then remove the discs and expander.
Pry off the piston pin circlip with a screwdriver and remove it from the piston ring groove.
We also take out the second retaining ring.
Push out the piston pin with a mandrel and remove the piston from the connecting rod
With a 17 head, we unscrew ten bolts securing the crankshaft main bearing caps
Removing the lids
Pull out the liners from the roofnis
Removing the crankshaft
We put the engine parts in order on the racks and mark them in order to put everything in its place during assembly.
We take out the thrust half rings from the grooves of the middle main bearing support
Remove the main bearing shells from the beds of the cylinder block
Nozzles for piston cooling are pressed into the bed of the main bearing block
If the parts of the connecting rod and piston group are not damaged and slightly worn, they can be reused.
Therefore, when disassembling, you need to mark the parts so that they can be installed in their places during subsequent assembly