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. Dismantle and capital repairs

GENERAL INFORMATION

Check of pressure of oil by means of the manometer screwed to the place of the oil pressure sensor


Oil pressure sensor

The oil pressure sensor (it is specified by an arrow) is located in forward part of the block of cylinders, near an oil filter.

In this subsection the order of performance of such works as dismantle of the power unit from the car and capital repairs of a head of the block of cylinders, the crankshaft cylinders / case block, and other details of the engine is in detail considered.

Advice on preparation and the organization of works on capital repairs and acquisition of spare parts is given, procedures of removal, check of technical condition, repair and installation of knots and details of the engine are in detail described.

Since the following subsection the description is kept in the assumption that the engine is removed from the car. The description of types of repair without removal of the engine from the car is provided in subsection 3.1.1. The order of removal and installation of the external knots and units of the engine necessary for performance of capital repairs is given in subsection 3.1.2.6.

At the beginning of a porazdel all standard data necessary for check of technical condition and capital repairs which procedures are described below are provided. Additional data are provided in subsection 3.1.1.1.

Capital repairs of the engine – general comments

It is not always easy to come to a conclusion about expediency of complete capital repairs of the engine as it is necessary to be based on a number of objective indicators.

Big run is not a sufficient indicator of need of carrying out capital repairs, on the other hand, small run does not exclude need of carrying out capital repairs. The most important indicator most likely is timeliness of the current maintenance of the engine. At timely change of oil and the filter, and also when performing all other necessary works on service, the engine serves reliably throughout many thousands of kilometers of run. On the contrary, insufficient on volume or untimely maintenance can be the reason of sharp reduction of a resource of the engine.

The raised consumption of oil indicates wear of piston rings, the directing plugs of valves and oil scraper caps. It is necessary to be convinced that leaks are not the reason of the raised oil consumption, and only after that to draw a conclusion about unfitness of piston rings and the directing plugs of valves. To define a probable cause of malfunction, measure a compression in engine cylinders (see subsection 3.1.2.3).

Carry out also tests by means of the vacuum gage and define character of indications of this device (see subsection 3.1.2.2).

Check oil pressure the manometer screwed to the place of the oil pressure sensor (see rice. Check of pressure of oil by means of the manometer screwed to the place of the oil pressure sensor) also compare result of check to standard value. If oil pressure low, can be the cause wear of radical and shatunny bearings or details of the oil pump.

Loss of power, "failures" in operation of the engine, a detonation or metal knocks, the increased noise from the gas-distributing mechanism, the increased fuel consumption indicate carrying out capital repairs the need, especially, if all these signs of abnormal work are shown at the same time. If performance of all adjustments does not lead to improvement, the only means of elimination of abnormal operation of the engine are capital repairs. Capital repairs consist in restoration of details of the engine to the state specified in specifications for the new engine. When carrying out capital repairs pistons and piston rings are replaced, cylinders are chiseled or honningutsya. After repair of cylinders which is carried out in a specialized workshop, installation of repair pistons will be required. Shatunny and radical inserts of the crankshaft, and also cover of basic necks of a cam-shaft are also subject to replacement, if necessary it is necessary to proshlifovat crankshaft necks before restoration of normal gaps with shatunny and radical inserts. As a rule, also valves, as their state at the time of repair as a rule not the absolutely satisfactory are subject to repair. During capital repairs of the engine repair of such units as a starter, the generator and the distributor of ignition is also carried out. As a result the repaired engine has to possess qualities of the new unit and sustain considerable run without refusals.


Prevention

At capital repairs it is necessary to replace such important details of the cooling system as hoses, drive belts, the thermostat and the pump of cooling liquid. The radiator should be surveyed on tightness and purity of internal channels (see subsection 4.5). If you bought the repair engine, or the block of cylinders of an incomplete complete set, some suppliers do not give a guarantee on operation of these units without high-quality washing of a radiator. At capital repairs of the engine it is also recommended to replace the oil pump.


Before capital repairs of the engine study the description of the corresponding procedures that there was an impression of the forthcoming amount of works and requirements to them. At observance of all norms and rules, in the presence of all necessary tools and adaptations, it is simply to execute capital repairs, however considerable expenses of time will be required. Approximately not less than two weeks, especially are required if for repair and restoration of details it is necessary to address in a specialized workshop. Check existence of spare parts and in advance think of acquisition of necessary special tools and the equipment. Almost all works can be performed by means of a standard tool kit though exact measuring devices will be necessary for check and determination of suitability of these or those details. Often check of a condition of details is carried out in specialized workshops in which also receive recommendations about replacement or restoration of these or those details.
Prevention

It is necessary to address in workshops of car service only after full dismantling of the engine and check of a condition of all details, especially the block of cylinders to solve which operations on service and repair will be carried out in workshops.


As the condition of the block of cylinders is the defining factor of making decision on its further repair or about purchase new (or repair) the block of cylinders, it is necessary to buy spare parts or to carry out operations on machining of the accompanying details only after careful check of its technical condition. Make it a rule that the true price of repair is time, – then it is not necessary to pay for installation of the worn-out or restored details.

In summary we will note that assembly of any units should be carried out with all care in the pure room to avoid further failures of the repaired engine and to ensure its reliable functioning.