Toyota Land Cruiser

FJ60, FJ62 and FJ80 1980-1997 of release

Repair and operation of the car



Toyota Land Cruiser
+ 1. Maintenance instruction
+ 2. Maintenance
- 3. Engines
   + 3.1. Engines 2F and 3F-E
   + 3.2. Verkhneklapanny engine 1FZ-FE
   - 3.3. Dismantle and capital repairs of the engine
      3.3.1. Technical characteristics
      3.3.2. Diagnostics of the engine by means of the vacuum gage
      3.3.3. Check of a compression
      3.3.4. Dismantle of the power unit
      3.3.5. Removal and installation of the engine
      3.3.6. Alternatives of capital repairs
      - 3.3.7. Order of dismantling of the engine
         3.3.7.1. Head of cylinders
         3.3.7.2. Repair of valves
         3.3.7.3. Conrod and piston group
         3.3.7.4. Crankshaft
         3.3.7.5. Cleaning and check of the block of cylinders
         3.3.7.6. Honningovaniye of cylinders
         3.3.7.7. Rods and pistons
         3.3.7.8. Radical and conrod bearings
      + 3.3.8. Engine assembly order
      3.3.9. Launch of the engine after repair and a running in
   + 3.4. Engine electric equipment
+ 4. Cooling systems, heating
+ 5. Fuel and exhaust systems
+ 6. System of decrease in toxicity
+ 7. Transmission
+ 8. Brake system
+ 9. Suspension brackets and steering
+ 10. Body
+ 11. Electric equipment
+ 12. Electrical circuitries





eeac64fe


3.3.7.8. Radical and conrod bearings

GENERAL INFORMATION

Radical and conrod bearings at capital repairs of the engine are subject to obligatory replacement, however the bearings which were in operation should be checked carefully to restore the general condition of the engine at the time of repair.

Insufficient lubricant because of the wrong assembly, pollution and penetration of foreign particles, frequent overloads of the engine, corrosion, etc. are causes of destruction of bearings of a bent shaft. Irrespective of the reason which caused destruction of bearings it should be eliminated.

Types of wear of radical and conrod bearings

Selection of radical bearings

The chart for selection of conrod bearings on engines 3F-E

 

Marking And
1,484 – 1,488 mm
Marking In
1,488 – 1,492 mm
Marking With
1,492 – 1,496 mm

The chart for selection of conrod bearings of the crankshaft on engines 3F-E

1. Crankshaft

2. Central counterbalance

3. N3 bearing

4. Dimensional group of the bearing

Marking on the bearing
Number on the crankshaft
3
4
5
Number on the block of cylinders
6
7
8
6
7
8
6
7
8
Dimensional group of the bearing *
T3
T4
T5
T2
T3
T4
T1
T2
T3

* Example: Number on the crankshaft 5, number on the block of cylinders 7 = the dimensional T2 group.

Diameter of radical bearings and internal diameter of an opening under radical bearings on engines 3F-E

Diameter of a neck of the crankshaft
mm
Marking-3
N1
66.972 – 66.980
N2
68.472 – 68.480

N3

69.972 – 69.980
N4
71.472 – 71.480

Marking-4

 

N1
66.980 – 66.988
N2
68.480 – 68.488
N3
69.980 – 69.988
N4
71.480 – 71.488

Marking-5

 

N1
66.988 – 66.996
N2
68.488 – 68.496
N3
69.988 – 69.996
N4
71.488 – 71.496
Diameter of an opening under radical bearings
N
mm

Marking-6

 

N1
72.010 – 72.018
N2
73.510 – 73.518
N3
75.010 – 72.018
N4
76.510 – 76.518

Marking-7

 

N1
72.018 – 72.026
N2
73.518 – 73.546
N3
75.018 – 75.026
N4
76.518 – 76.526

Marking-8

 

N1
72.026 – 72.034
N2
73.526 – 73.534
N3
75.026 – 75.034
N4
76.526 – 76.524

The chart for selection of standard conrod bearings on engines 1FZ-FE

 

The put number
Marking on a rod
1
2
3
Number on the crankshaft
1
2
3
1
2
3
1
2
3
Marking of dimensional group of the bearing *
2
3
4
3
4
5
4
5
6

* Example: Number on a rod 3 + number on the crankshaft 1 = Dimensional group of the bearing 4.

The chart for selection of standard radical bearings of the crankshaft on engines 1FZ-FE


The put number
Marking on the block of cylinders
1
2
3
Number on the crankshaft 1 2 3 1 2 3 1 2 3
Marking of dimensional group of the bearing * 2 3 4 3 4 5 4 5 6

* Example: Number on the block of cylinders 2 + number on the crankshaft 1 = Dimensional group of the bearing 3.

Diameter of radical bearings and internal diameter of an opening under radical bearings on engines 1FZ-FE

Diameter of an opening under radical bearings:

  – marking 1

74.026 – 74.032 mm
  – marking 2
74.032 – 74.038 mm
  – marking 3
74.03 – 74.044 mm
Diameter of a neck of the crankshaft:

  – marking 1

68.994 – 69.000 mm
  – marking 2
68.988 – 68.994 mm
  – marking 3
68.982 – 68.988 mm
Thickness of standard bearings:

  – marking 2

2.489 – 2.492 mm
  – marking 3
2.49 – 2.495 mm
  – marking 4
2.495 – 2.498 mm
  – marking 5
2.498 – 2.501 mm
  – marking 6
2.501 – 2.504 mm

PERFORMANCE ORDER
1. If bearings of standard dimensional groups are installed, then the new bearing is selected according to numbers put on replaced, and also according to numbers on the block of cylinders and the crankshaft with use of tables.
2. If the crankshaft was ground, then bearings should be selected in car service in which grinding was carried out.
3. After selection of bearings measure a gap in necks (see subsection 3.3.8.2).
4. Industrially at assembly of the engine bearings with different color marking which is put on a bearing insert edge are installed.
5. Marking of dimensional group of bearings is usually put from an insert, turned to a back part of the crankshaft, except for a back radical insert which is marked from turned to a forward part of the crankshaft.
6. It is allowed to establish the top and lower inserts from various dimensional groups. For example, to correct a gap on 0,0125 mm the standard insert sometimes is used with an insert from group with the reduced diameter at 0,025 mm.

Prevention

It is forbidden to establish couple of inserts if distinction of their diameters exceeds 0,025 mm. The inserts differing by the size should be established either all from above, or all from below.