Isuzu Trooper - Isuzu Trooper
1. Maintenance instruction
2. Maintenance
3. Engines
   3.1. Specifications of the engine and adjusting works
   3.2. Electric equipment and capital repairs of engines
      3.2.1. Electric equipment of engines
      3.2.2. Capital repairs of engines Technical characteristics Instructions on service and repair of the engine Dismantle and installation of the power unit Cover of a head of cylinders Yokes and rollers of yokes Thermostat The soaking-up collector Final collector Turbocompressor Conditioner Radiator The cooling system fan with the drive from the electric motor Pump of cooling liquid Head of cylinders Valves and springs Pushers Oil pallet Oil pump Epiploon of a forward cover of a gear belt Chain of the drive of the camshaft and asterisk of the drive Forward cover of a gear belt Epiploon of a bent shaft Gear belt and natyazhitel Gear belt and mechanism of a tension Drive of the gas-distributing mechanism petrol engines Drive of the gas-distributing mechanism diesel engines Camshaft Camshaft bearings Pistons and rods Conrod bearings Assembly of conrod and piston group and installation on the engine Caps and heater of a case of the engine Back epiploon of a bent shaft Bent shaft and radical bearings Flywheel and gear wreath
   3.3. Diesel engine 2,8 liters
4. System of decrease in toxicity
5. Fuel system
6. Transmission and running gear
7. Suspension bracket and steering
8. Brake system
9. Body
10. Body electric equipment
11. Diagnostics of malfunctions
12. Electrical circuitries

Isuzu Trooper>> Engines>> Electric equipment and capital repairs of engines>> Capital repairs of engines>> Instructions on service and repair of the engine Instructions on service and repair of the engine


Power deceleration, and also the raised consumption of oil and fuel testify to the general wear of knots and units of the engine. Wear of pistons is the reason, piston rings, destruction of laying of a head of the block of cylinders, a burn-out and wear turned gray also heads of valves. An effective way of detection of the reasons of unsatisfactory operation of the engine is check of a compression.

Check of a compression in cylinders of petrol engines


The head of the block of cylinders is cast from aluminum alloy therefore be careful not to strip a thread in openings for spark plugs.

1. Warm up the engine up to the normal working temperature.
2. Turn out candles.
3. Disconnect a high-voltage wire from the ignition coil.
4. Completely open a butterfly valve.
5. Screw in an opening for a candle of the 1st cylinder the compression measuring instrument, densely tighten.
6. Ask the assistant to press a pedal of a butterfly valve and to include a starter (on carburetor and injector engines). The starter has to join two-three times for a short time.
7. Define the indication of the manometer at the end of each inclusion of a starter and write down the maximum indication. Repeat the procedure for each cylinder. Compare the maximum indication to the data provided in Chapter 2 for the engine of the corresponding model. Values of a compression in separate cylinders should not differ no more than on 0,7–0,85 atm.
8. If the compression is lower than standard value, then fill in in the cylinder about 1 tablespoon of oil for the engine and repeat measurements. If the compression increased, then it indicates wear or breakage of piston rings, or the increased wear of walls of the cylinder. If pressure did not change, then the leaky prileganiye of valves to saddles (repair of the valvate mechanism is required), or damage of laying of a head of the block of cylinders near the cylinder is the reason. If low value of a compression in two next cylinders which does not change at oil addition is observed, then laying of a head of cylinders is damaged. For this reason oil and cooling liquid can get into the combustion chamber. Points to damage of laying also emergence of traces of cooling liquid on the oil probe.

Measurement of a compression on diesel engines

The procedure of check differs in nothing from described above, but has the features.

1. For diesels it is necessary to use the special measuring instrument of a compression calculated on much more high pressure.
2. It is necessary to remove from all cylinders tubes and nozzles with ring laying.
3. Track that the valve for drain of air from the measuring instrument of a compression was closed.
4. At installation of nozzles replace ring laying.

2,8 liters given for the diesel engine are specified in subsection 3.3.3.