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
      + 3.3.8. 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

3.3.3. Compression check


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

1. Turn out spark plugs.
2. Completely open a butterfly valve.
3. Disconnect ignition, having connected a coil wire to weight. On injector engines disconnect the fuel pump (see subsection 5.1.4).
4. Insert a compression measuring instrument into an opening for a candle of the 1st cylinder.
5. Include a starter and watch manometer indications. On the serviceable engine pressure should accrue 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, the reason is leak in valves or a leakage of laying or a head of cylinders. Write down the greatest value of a compression.
6. Repeat procedure for other cylinders.
7. Enter into cylinders a little oil (10–15 cm3). If after oil introduction in the cylinder the compression raised, it is possible to draw a conclusion on that that piston rings are worn-out. If the compression increases slightly, leak occurs via valves, or head laying.
8. If the compression equally low only in two next cylinders, the most probable cause is a laying burn-out between these cylinders.
9. If value of a compression exceeds norm, the chamber of combustion is covered with a deposit. In this case a head of cylinders it is necessary to remove and remove a deposit.
10. At strong distinction of a compression in cylinders it is necessary to hand over the car on car repair shop for check of tightness of a head and the block of cylinders an opressovka method.