We install the cylinder block on the engine assembly stand.
We collect and prepare the piston group
We prepare the crankshaft for assembly
Assembling the engine 470.63
First you need to lay the crankshaft.
To do this, unscrew the side bolts securing the yokes (main bearing caps) (Fig. 1).
We unscrew the lower bolts securing the yokes (main bearing caps) (Fig. 2)
We take out the yoke and put them in order (Fig. 3).
We wipe the seats of the main bearings.
We put the upper main bearing shells with a groove in the middle (Fig. 4)
Lubricate with engine oil and install the pushers in the block slots (Fig. 5)
Lubricate the upper main bearings with a thin layer of engine oil (Fig. 6)
We put the crankshaft in the cylinder block. The crankshaft must be laid so that the counterweight of the crankshaft of the first cylinder points downward relative to the engine sump (then it sits better in place) (Fig. 7)
Insert the lower main bearing shells into the yoke (main bearing caps), lubricate the shells and install the yoke so that the bearing locks match (Fig. 8).
We bait the lower bolts of the yokes
We insert steel-aluminum half rings into the grooves of the rear main support so that the side with the grooves adjoins the thrust ends of the shaft, and the mustache fits into the groove on the rear main bearing cover.
Pre-tighten the main bearing bolts to a torque of 94.2 ÷ 117.7 Nm (9.6 ÷ 12 kgf.m)
Start tightening with the middle main bearing (fig. 10), in the order 3-4-5-2-1.
Finally, tighten the main bearing cap bolts to 206-230.5 Nm (21-23.5).
We screw in and tighten the block tightening bolts M12, providing a tightening torque of 80.4 ÷ 90.2 Nm (8.2 ÷ 9.2 kgf.m).
When tightening with a torque wrench, the resistance should build up smoothly, without jerking. Count the moment when the key moves
At the end of the tightening, the crankshaft should turn freely from the force of the hand applied to the flywheel dowel pins, the axial clearance in the thrust bearing should be at least 0.05 mm.
For the convenience of installing the piston group, we turn the block on the stand to a vertical position.
We start the installation from the eighth cylinder
Insert the upper connecting rod bushing, lubricate it with a thin layer of engine oil (Fig. 11), and lubricate the cylinder with a thin layer of engine oil.
Using the device for installing the piston group, we insert the connecting rod with the piston into the cylinder block, ensuring a different arrangement of the ring locks so that the locks do not coincide on the same axis with the piston pin.
We carefully hammer the piston with the wooden side of the hammer, making sure that the bolts and the connecting rod bushing are in the correct position.
We insert the insert into the connecting rod cover, lubricate the connecting rod and set it in such a way that the locks of the inserts coincide (Fig. 13). We attach the connecting rod cover nuts.
Tightening torque for connecting rod cap bolts with M12 thread to lengthening by 0.25 ÷ 0.27 mm.
Reinforced bolts with M13 thread - 117.7 ÷ 127.4 Nm (12 ÷ 13 kgf.m).
After that, we insert the connecting rod with the piston into the fourth cylinder.
We scroll the crankshaft and insert the piston with the connecting rod into the 7th and 3rd cylinders.
In the same way, insert the rest of the piston with connecting rods and tighten with a torque wrench (Fig. 14), the torque indicated above.
We turn the crankshaft several times.