Toyota 4 Runner/Hilux/Surf

1987-1998 of release

Repair and operation of the car



Toyota 4ranner
+ 1. Maintenance instruction
+ 2. Maintenance
- 3. Engines
   + 3.1. 4-cylinder engines
   + 3.2. V6 3,0 engines of l (1993-1994) and 3,4 l (since 1995)
   - 3.3. Dismantle and capital repairs of the engine
      3.3.1. Specifications
      + 3.3.2. Capital repairs
      3.3.3. Diagnostics of the engine by means of the vacuum gage
      3.3.4. Check of a compression in engine cylinders
      + 3.3.5. Dismantle of the power unit
      - 3.3.6. Head of cylinders
         3.3.6.1. Dismantling of a head of cylinders
         3.3.6.2. Cleaning and check of a head of cylinders
         3.3.6.3. Assembly
      3.3.7. Valves
      3.3.8. Conrod and piston group
      + 3.3.9. Crankshaft
      3.3.10. Block of cylinders
      3.3.11. Honningovaniye of cylinders
      + 3.3.12. Rods and pistons
      3.3.13. Radical and conrod bearings
      3.3.14. Balancer shafts
      3.3.15. Assembly order
      3.3.16. Piston rings
      3.3.17. Launch of the engine after repair and a running in
+ 4. Systems of heating, ventilation
+ 5. Fuel and exhaust systems
+ 6. Transmissions
+ 7. Transmission elements
+ 8. Brake system
+ 9. Suspension bracket and steering
+ 10. Body
+ 11. Electric equipment
+ 12. Electrical circuitries


3.3.6.2. Cleaning and check of a head of cylinders

GENERAL INFORMATION

Places of check of wear of the valve

1. End face

2. Flutes under crackers

3. Core

4. Facet

5. Inlet valve

6. Corbel

7. Final valve

Characteristic wear of an end face of the valve

Cleaning

PERFORMANCE ORDER
1. Remove all remains of laying from demountable surfaces of a head, being careful not to damage a surface. Remove a deposit from combustion chambers, heads of valves and a scum from channels of cooling. Banish and clean all carving openings.
2. Wash out solvent all details of the valvate mechanism, being careful not to damage them.

Check

PERFORMANCE ORDER
Head
1. Attentively examine a head, check existence of cracks and signs of penetration of cooling liquid. At detection of cracks replace a head.
2. Check deformation of a demountable surface of a head. If the deviation from the plane exceeds norm, then the head should be pereshlifovat.
3. Check a condition of saddles of valves. In the presence of pitting (poles), cracks, traces of a burn-out repair of a head in car service will be required.
4. Check a valve side play in the cross direction (shooter). If a half of a total side play on the indicator exceeds norm, then the plug should be replaced (it is carried out in car service).
Valves
5. Attentively examine valves (cm. rice. Places of check of wear of the valve), check existence on facets of valves of cracks, traces of uneven development, ablation of metal and a progar. Check existence of cracks on necks and cores, and also a bend of cores, turning the valve in the directing plug.
6. Check wear of end faces of cores (see rice. Characteristic wear of an end face of the valve). Presence of any of the specified defects indicates the need of repair of valves.
7. Measure width of a regional corbel (1) of each valve and compare to standard value. If this distance is less than norm, then replace the valve.
Details of the valvate mechanism
8. Measure spring length in a free state. Replace springs with shrinkage. Before installation of springs it is necessary to check them for the repaired engine under loading at the special stand in car service.
9. Check vertical position of springs. At detection of a deviation of a spring from a vertical the spring should be replaced.
10. Check existence of visible wear tracks and cracks on plates of springs and crackers. Replace details with any defects.
11. If when checking it becomes clear that wear of details does not exceed norm, then collect a head of cylinders, having established details on former places. It is necessary to carry out repair of a head of cylinders of any complexity in car service.

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