Note: Thoroughly clean all parts to be assembled.
Before installing parts, apply new engine oil to all sliding and rotating surfaces.
Replace all gaskets, O-rings and oil seals with new parts.
1. Install oil jets and check valves (see section "Lubrication system").
2. Install the main bearing shells.
a) Align the bearing protrusion with the recess in the block and in the main bearing cap.
b) The bearing shell with the hole must be installed in the cylinder block.
3. Install the upper thrust half rings into the recess of the middle (3rd) main journal, with the grooves of the half rings facing outward (away from the journal).
4. Install the crankshaft onto the cylinder block.
5. Install the main bearing caps and lower thrust half rings.
a) Install the cover of the 3rd main bearing with the upper half rings installed in it, the grooves of which should be directed outward (away from the journal).
b) Install the remaining covers, taking into account their number and the direction of the arrows, which should be directed towards the nose of the crankshaft.
c) Apply a thin coat of engine oil to the threads and under the heads of the main bearing cap bolts.
d) Install and tighten the ten main bearing cap bolts evenly, in several passes, in the sequence shown in the illustration.
- Tightening torque - 103 Nm
d) Check the smooth rotation of the crankshaft.
e) Check the crankshaft axial clearance (see the relevant paragraph).
6. Install the connecting rod and piston group.
a) Cover the connecting rod bolts with short pieces of hose to protect the crankshaft from damage.
b) Using a piston ring crimper, insert the piston and connecting rod assembly into each cylinder, observing the numbering. The marking on the front side of the piston should face the front side of the engine.
7. Install the connecting rod lower head caps.
A. Place the cap on the connecting rod.
a) Align the numbered connecting rod cap with the corresponding connecting rod.
b) Install the connecting rod cap in place with the front side marking facing the front of the engine.
B. Install the connecting rod cap nuts.
Note: Connecting rod cap nuts are tightened in two successive stages.
If any of the connecting rod bolts are broken or deformed, replace them.
a) Apply a thin coat of engine oil to the threads and under the connecting rod cap nuts.
b) Install and tighten the connecting rod cap nuts one by one, doing this in several passes.
- Tightening torque - 54 Nm
If any of the connecting rod nuts does not meet the tightening torque requirements, replace the nut.
c) Mark the front side of the connecting rod cap nut with paint.
d) Tighten the connecting rod cap nuts further by turning each of them 90° as shown in the figure.
If new nuts are used, the preliminary tightening torque is 34 Nm, then the nut is turned further by 120°.
d) Check the mark offset by 90° relative to the direction towards the front side.
e) Check the smooth rotation of the crankshaft.
g) Check the connecting rod axial clearance (see page 24).
8. Install the rear oil seal retainer, install a new gasket and retainer with four bolts.
- Tightening torque - 13 Nm
