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
      + 3.3.8. 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





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3.3.3. Check of a compression

GENERAL INFORMATION

Results of check of a compression in cylinders of the engine allow to judge a condition of details of the engine (pistons, rings, valves and saddles, laying of a head of the block of cylinders).

For obtaining exact results of check the engine has to be heated-up up to the normal temperature, and the battery is completely charged.

PERFORMANCE ORDER
1. Turn out spark plugs.
2. Completely open a butterfly valve.
3. Disconnect ignition, having connected a coil wire to weight. On injector engines switch-off the fuel pump (see subsection 5.1.4).
4. Insert the compression measuring instrument into an opening for a candle of the 1st cylinder.
5. Include a starter and you monitor indications of the manometer. On the serviceable engine pressure has to increase quickly. Low pressure after the first piston stroke and slow increase at the subsequent steps of compression indicates wear of piston rings. If after the first piston stroke pressure low, and at the subsequent steps of compression does not increase, then leak in valves or leakage of laying or a head of cylinders is the reason. Write down the greatest value of a compression.
6. Repeat the procedure for other cylinders.
7. Enter a little oil (10–15 cm3) into cylinders. If after introduction of oil to the cylinder the compression raised, then it is possible to draw a conclusion that piston rings are worn-out. If the compression increases slightly, then leak happens via valves, or laying of a head.
8. If the compression equally low only in two next cylinders, then is the most probable cause a laying burn-out between these cylinders.
9. If value of a compression exceeds norm, then the combustion chamber is covered with a deposit. In this case the head of cylinders should be removed and removed a deposit.
10. At strong distinction of a compression in cylinders the car should be handed over on car repair shop for check of tightness of a head and the block of cylinders by a pressure testing method.