Toyota Land Cruiser

FJ60, FJ62 and FJ80 1980-1997 of release

Repair and car operation



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 major maintenance of the engine
      3.3.1. Technical characteristics
      3.3.2. Engine diagnostics by means of the vacuum gage
      3.3.3. Compression check
      3.3.4. Dismantle of the power unit
      3.3.5. Removal and engine installation
      3.3.6. Alternatives of major maintenance
      - 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. Shatunno-porshnevaya 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 shatunny bearings
      + 3.3.8. Engine assembly order
      3.3.9. Engine start-up after repair and a running in
   + 3.4. Engine electric equipment
+ 4. Systems of cooling, 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. Electroschemes




3.3.7.1. Head of cylinders

GENERAL INFORMATION

Details of the klapanny mechanism

1. Crackers

2. Plates

3. Springs

4. Umbellate caps

5. Valves

Dismantling

PERFORMANCE ORDER

Prevention

Acquisition of a new head of the block, than dismantling, check and repair of a head being in operation is represented to more expedient.


1. For dismantling of a head of the block of cylinders it is necessary to remove yokes
with rollers, valves and accompanying details.
2. The removed details should be stored in an order of their installation.
3. Compress a spring of the first valve by means of the suitable adaptation and remove crackers. Carefully release a valve spring, remove a plate of a spring, a spring and a basic washer (if is available).
4. Get the valve and remove a maslosjemny cap. If the valve does not leave the plug, polish a file a fillet about a valve end face.
5. Repeat the same actions for other valves.
6. Clear a head of cylinders and examine (it is recommended to make it after final dismantling of the engine).

Cleaning

PERFORMANCE ORDER
1. Remove from demountable surfaces of a head all remains of laying, being careful not to damage a surface. Remove a deposit from chambers of combustion, heads of valves and a scum from cooling channels. Banish and clean all carving openings.
2. Carefully wash out solvent all details of the klapanny mechanism, being careful not to damage them.
3. Process all carvings a tap or a die, wash out and blow the compressed air.
4. Clear a bolt of an axis of a yoke and a hairpin a rigid brush.

Check

HEAD OF CYLINDERS

PERFORMANCE ORDER
1. Attentively examine a head, check existence of cracks and signs of penetration of cooling liquid. At detection of cracks a head replace.
2. Check deformation of a demountable surface of a head. If the deviation from the plane exceeds norm, a head follows перешлифовать.
3. Check a condition of saddles of valves. In the presence of a petting (poles), cracks, traces of a burn-out head repair in car-care center is required.
4. Lower the valve approximately on 1,5 mm and check люфт a core in the cross-section direction. If a half total люфта on the indicator more exceeds norm (a standard gap in the plug), it is necessary to replace the plug (is carried out in car-care center). At any signs of a doubtful condition of the plug they should be checked in car-care center.

VALVES

Places of check of wear of the valve

1. End face

2. Flutes under crackers

3. Core

4. Inlet valve

5. Facet

6. Corbel

7. Final valve

Characteristic wear of an end face of the valve

1. Normal wear (a trace from duplicator work)
2. Abnormal work of a duplicator
3. Abnormal work of a duplicator

Check

PERFORMANCE ORDER
1. Attentively examine valves, check existence on facets of valves of cracks, traces of non-uniform development, ablation of metal and прогара.
2. Check existence of cracks on necks and cores, and also a bend of cores, turning the valve in the directing plug (see fig. Places of check of wear of the valve).
3. Check wear of end faces of cores. Presence of any of the specified defects indicates need of repair of valves (see fig. Characteristic wear of an end face of the valve).
4. Measure width of a regional corbel (1) each valve and compare to standard value. If this distance is less than norm, the valve replace.

MECHANISM KLAPANNOGO'S DETAILS

PERFORMANCE ORDER
1. Measure length of a spring in a free condition. Springs with a usadka replace. Before installation of springs on the repaired engine it is necessary to check them under loading at the special stand in car-care center.
2. Check wear and length of springs. Springs with a usadka replace. Check elasticity of springs (it is carried out in car-care center).
3. Check vertical position of springs. At a deviation from a vertical a spring replace.
4. Check existence of visible wear tracks and cracks on plates of springs and crackers. Details with any defects replace.

YOKES OF THE DRIVE OF VALVES

PERFORMANCE ORDER
1. Check existence on persistent surfaces of yokes of poles, traces of development, a metal navolakivaniye. Check also a condition of rollers of yokes and the spherical terminations of axes.
2. Check a condition of end faces of bars, existence on them of chips and development traces. Check deformation of bars, having given a ride to them on sheet glass.
3. Replace strongly worn-out details.
4. If check shows that details of the klapanny mechanism are worn-out, collect a head and hand over in repair.

Assembly

Napressovka of maslosjemny caps

1. A cap in an opravka

2. Valve end face

3. Cap

4. Opravka

PERFORMANCE ORDER
1. Before the assembly beginning. it is necessary to be convinced of purity of a head of the block irrespective of repair of this detail in car-care center was carried out or not.
2. If the head of the block was under repair in car-care center, measure spring height in the established condition.
3. Establish all details of the klapanny mechanism upside-down, having begun with maslosjemny caps (see Napressovk's fig. of maslosjemny caps). On a part of engines consolidations of umbellate type which are established only after valve installation are used.
4. Establish basic washers or laying, a spring, a glass and a plate.

Prevention

Springs of valves of the engine 3F-E have color marking on which the spring is guided (see subsection 3.1.7).


5. Compress springs and establish crackers. Before assembly grease crackers for their temporary fixing.
6. Check spring height after assembly, i.e. distance from a basic washer to bottom edge of a plate (or the top surface of a glass). If the height appears more norm, establish additional basic washers.

Prevention

It is forbidden to correct spring height selection of washers in case height less norm.