Toyota Corolla

1992-1998 of release

Repair and operation of the car



Toyota Corolla
+ 1. Maintenance instruction
+ 2. Maintenance
- 3. Engines
   - 3.1. Petrol engines
      + 3.1.1. Repair work without dismantle of the engine from the car
      - 3.1.2. Dismantle and capital repairs
         3.1.2.1. Specifications
         3.1.2.2. Diagnostics of the engine by means of a vakuumer
         3.1.2.3. Check of a compression in engine cylinders
         + 3.1.2.4. Dismantle of the power unit - methods and safety measures
         3.1.2.5. Alternatives of capital repairs of the engine
         3.1.2.6. Order of dismantling of the engine
         3.1.2.7. Head of the block of cylinders
         3.1.2.8. Repair of valves
         3.1.2.9. Shatunno-porshnevaya group
         3.1.2.10. Dismantle of the crankshaft
         3.1.2.11. Block of cylinders
         3.1.2.12. Honningovaniye of cylinders
         3.1.2.13. Cranked shaft
         3.1.2.14. Radical and shatunny bearings
         3.1.2.15. Engine assembly order
         3.1.2.16. Piston rings
         3.1.2.17. Installation of a cranked shaft and check of gaps of radical bearings
         3.1.2.18. Back epiploon
         3.1.2.19. Installation of shatunno-piston group
         3.1.2.20. Start-up of the engine after repair and a running in
   + 3.2. Diesel engine
   + 3.3. Electric equipment of the engine
+ 4. Cooling systems, heating
+ 5. Fuel, exhaust systems
+ 6. System of decrease in toxicity
+ 7. Transmissions
+ 8. Coupling and half shafts
+ 9. Brake system
+ 10. Suspension bracket and steering
+ 11. Body
+ 12. Electric equipment



3.1.2.14. Radical and shatunny bearings

GENERAL INFORMATION

Types of wear of radical and shatunny bearings

A. Fatigue wear (shooters specified craters or pockets)
B. Scratches because of dirt hit
(shooters specified dirt introduction places
in covering material)
C. Excessive wear (the arrow specified a bearing covering wipe from all surface)
D. The wrong installation of the bearing (shooters are specified shining (the polished sites)
E. Insufficient greasing (shooters specified a bearing covering wipe)
F. Conicity of necks (the arrow specified a place of formation of a fillet on a bearing edge)

Places of drawing dimensional groups of inserts and necks on l engines 1,6 and 1,8

1. On the block of cylinders: places of drawing tags 1, 2 or 3

2. On the crankshaft: tags 0, 1 or 2

3. On inserts: tags of dimensional group (from 1 to 5)

Check

In spite of the fact that radical and shatunny bearings at capital repairs of the engine are subject to obligatory replacement, the bearings which were in operation should be stored in a place of their installation for careful check as wear tracks on these details allow to restore the general condition of the engine.

Insufficient greasing, presence of dirt and foreign particles, overload of the engine and corrosion are causes of destruction of bearings of a cranked shaft. Irrespective of the reason which caused destruction of bearings it should be eliminated before final assembly of the engine to avoid repeated damages of these details.

When checking a condition of bearings they should be got from seats (from the block of cylinders, covers of radical bearings of a cranked shaft, shatunny covers and rods) and to lay out on a pure surface in the same order in which they were established on the engine. It will allow to establish the corresponding support of a cranked shaft in which the bearing underwent the increased wear.

Dirt and foreign particles get to the engine for various reasons, in the course of assembly, via filters or system of ventilation of a case. Pollution can also get to oil, and from it – to bearings. Often at pollution there are metal particles from machining of details of the engine, or owing to wear at normal operation of the engine. Sometimes at pollution there are remains of abrasive materials after carrying out pritirochny and grinding works, especially at insufficient washing and a clearing of the engine after completion of works. Irrespective of the origin reason foreign pollution usually take root into a soft alloy of the bearing and are easily distinguishable. Large particles will not be able to take root into the bearing and lead to emergence of scratches and zadir on surfaces as bearing and necks of the crankshaft. The best way of the prevention of such wear is careful washing of details and maintenance of faultless purity at assembly of the engine. For the prevention of premature wear it is also recommended to a thicket to change oil and filters.

Insufficient greasing of the engine ("oil starvation") can be caused by a number of the interconnected reasons. Overloads concern to them an engine overheat (causes oil fluidifying) (cause expression of oil from a surface of bearings) and pressure decrease because of leak (emission) of oil (because of the raised gaps in bearings, wear of the oil pump, big frequency of rotation of a cranked shaft). Also blocking of oil channels, usually owing to a nesovmeshchennost of lubricant openings in the bearing and details of its case that causes insufficient greasing and failure is the reason of the accelerated wear of bearings of a cranked shaft. When insufficient greasing is a cause of destruction there is a wipe or expression of material of a covering of the bearing from a steel basis. Temperature increases to such level that from an overheat there is a vykrashivaniye of a steel basis of the bearing which gets a bluish shade.

The durability of bearings of a cranked shaft also significantly depends on skills of driving and nature of movement. Bearings experience the raised strain at the movement at a small speed at the included overgear. At the raised loadings there is an expression of an oil film. Bearings experience flexural deformations at which microcracks (fatigue wear) are formed. As a rule there is a bearing covering separation from a steel basis in the form of small particles. Trips on small distances can be the reason of corrosion wear of bearings as because of insufficient warming up the condensed moisture and gases causing corrosion do not manage to be removed. These components collect in oil, causing formation of acids and insoluble rainfall. In process of intake of oil to bearings there is a corrosion under the influence of acids, causing destruction of bearings and failure.

The exit of bearings out of operation can be also caused by the wrong installation at assembly of the engine. Too small gap in bearings is the reason of insufficient greasing and the increased wear. The dirt and foreign particles which got under the back party of the bearing cause its uneven prileganiye and premature failure.

Selection

If the bearings which were in operation are worn-out or have damages, or the gap in bearings does not meet standard (see subsection 3.1.2.17 and subsection 3.1.2.19), for selection of bearings it is necessary to execute certain actions which are described below. Nevertheless, if the crankshaft pereshlifovyvatsya, it is necessary to establish new repair inserts, – in this case not to apply the described procedures! In a workshop in which the crankshaft was under repair, will help you with a choice of inserts of the suitable size. Irrespective of a way of determination of the size of inserts measure a gap in bearings by means of a plastic calibration wire. It measurements are defining at installation of inserts.

PERFORMANCE ORDER
Radical bearings
1. If inserts of the standard size are necessary, establish inserts with the same number of dimensional group, as on old bearings (places of drawing numbers are specified rice. Places of drawing dimensional groups of inserts and necks on l engines 1,6 and 1,8). (On the crankshaft are not applied on 1,3 l of number). Inserts of radical bearings of engines of 1,3 l are broken into three dimensional groups, and inserts of bearings of engines 1,6 and 1,8 of l – on two groups.
2. If number of group on old inserts does not manage to be established, find numbers of dimensional group of radical necks which are put on the demountable plane of the block of cylinders from the oil pallet, and on l engines 1,6 and 1,8 – on crankshaft counterbalances (see rice. Places of drawing dimensional groups of inserts and necks on l engines 1,6 and 1,8).
3. On engines of 1,3 l number for an insert of the corresponding cylinder is stamped on the demountable plane of the block. Number of dimensional group of inserts has to correspond to number on the block of cylinders. On l engines 1,6 and 1,8 the dimensional group of inserts of the corresponding neck is defined as number sum on the block of cylinders and numbers on a crankshaft counterbalance.
Shatunny bearings
4. Number of dimensional group of standard shatunny inserts is stamped on a rod cover.
All bearings
5. A final and decisive stage at selection of new shatunny and radical bearings is check of a gap with crankshaft necks. If there were any doubts in the relation of the selected details, consult at the supplier of spare parts, or in service of car service of the dealer.