2. Turn away nine bolts and one nut and remove the case of a chain of a drive of the mechanism timing together with a lining.
3. Turn away five bolts, remove the case of a back epiploon of a cranked shaft, a dust deflector and a lining.
4. Check up an axial backlash of the lower head of a rod.
- Nominal - 0.160 - 0.312 mm
- Maximum allowable - 0.35 mm
If the clearance is greater, replace the connecting rod.
5. Remove the connecting rod caps and check the clearance in the connecting rod journals.
A) Using a punch or stamp, mark the caps and connecting rods.
b) Loosen the cap nuts.
V) Using a plastic mallet, tap on the ends of the bolts and remove the connecting rod cap, keeping the bottom bearing from falling out of it.
G) Put the pre-cut pieces of hose on the connecting rod bolts so as not to damage the crankshaft journals.
d) Clean the bearings and crankshaft journals.
e) Inspect each neck and liner for chips and scratches. If the necks or liners are damaged, replace the liners. If necessary, replace the crankshaft.
and) Place a strip of plastic measuring tape on the crankshaft journal.
h) Install the connecting rod cap and tighten the nuts
- Tightening torque - 49 Nm
Attention: do not turn the shaft.
And) Remove the connecting rod cover.
To) Measure the widest part of the print on the tape.
Clearances:
- Nominal (STD) - 0.020 -0.051 mm
- Reduced by 0.25 mm repair (U/S) - 0.021 - 0.067 mm
- Maximum clearance - 0.10 mm
If the clearance is greater, replace the bearing shells.
If necessary, replace the crankshaft.
Attention: if a standard bearing is used, it must be changed to the same number that is indicated on the connecting rod cap. There are three sizes of standard earbuds, marked "6", "7" And "8" respectively.
Nominal liner thickness:
- Number "6" - 1.486 - 1.496 mm
- Number "7" - 1.496 - 1.494 mm
- Number "8" - 1.494 - 1.498 mm
l) Remove the measuring tape.
6. Remove the piston group.
A) Remove soot from the cylinder lip with a countersink.
b) Close the connecting rod bolts with pieces of hose.
V) Push out the piston group (piston, connecting rod and top bearing).
Attention: Assemble the liner, connecting rod and connecting rod cap of each cylinder together and arrange all piston kits in order.
7. Moving the crankshaft with the lever back and forth, measure (using an indicator or a feeler gauge) axial clearance of the crankshaft.
- Nominal clearance - 0.020 - 0.220 mm
- Maximum clearance - 0.300 mm
If the clearance is greater, replace the thrust rings.
- Thrust ring thickness - 2.440 - 2.490 mm
8. Remove the main bearing caps and check the clearance in the main bearings.
A) Turn away nuts of bolts of covers of radical bearings.
b) Using the bolts, shake the main bearing caps, remove the caps together with the liners, and also remove the lower thrust rings from the third journal cap.
Attention: Leave the top bearings and thrust washers in place in the cylinder block. Position the main bearing caps and lower thrust washers in order.
V) Raise the crankshaft.
Attention: Leave the top bearings and thrust washers in place in the cylinder block.
G) Clean the bearings and main journals.
d) Check each earbud and neck for chips and scratches.
If the earbud or neck is damaged, replace the earbuds.
If necessary, replace the crankshaft.
e) Lay the crankshaft in the bed of the block.
and) Place a strip of plastic measuring tape on the main journal.
h) Install and tighten the main bearing caps.
- Tightening torque - 78 Nm
Attention: do not rotate the crankshaft.
And) Remove covers.
To) Measure the widest part of the print on the tape.
- Nominal (STD) - 0.020 -0.051 mm
- Repair size reduced by 0.25 mm (U/S) - 0.021 - 0.067 mm
- Maximum clearance - 0.10 mm
If the clearance is greater, replace the main bearings.
Attention: when using standard liners, they must be changed to those with the same number indicated on the cylinder block. There are three sizes of standard earbuds, marked "1", "2" And "3" respectively.
Nominal bearing thickness:
- Number "1" - 1.986 - 1.990 mm
- Number "2" - 1.990 - 1.994 mm
- Number "3" - 1.994 - 1.998 mm
l) Remove the plastic tape.
9. Take a cranked shaft, then remove the top loose leaves and the top persistent half rings from the block of cylinders and arrange them in order.