SAFARI BSVI - SERVICE MANUAL

KRYOTEC ENGINE 63 5. ENGINE TESTS AND DIAGNOSIS A. ENGINE TESTS CYLINDER COMPRESSION TEST 1. Warm up engine to operating temperature (approximately 80 °C, 176 °F). 2. Shut the engine off. 3. Remove the glow plug of cylinder to be tested. 4. Install the compression checking tool adapter (5412 5890 0628) . 5. Connect the compression tester to the adapter. 6. Test compression pressure by cranking engine with starter for at least 8 revolutions. Description Specification Difference Between Cylinders Cylinder Compression 21 – 25 bar (304-362 psi) 5 bar (73 psi) 7. Carry out test procedure at the remaining cylinders in the same way. 8. Check that there is not a great difference between the pressure readings for the cylinders. 9. Remove the compression checking tool adapter. 10. Install the glow plug. CYLINDER LEAKAGE TEST The cylinder leakage test provides an accurate means for determining engine condition. Cylinder leakage testing will detect: • Exhaust and intake valve leaks (improper seating). • Leaks between adjacent cylinders or into water jacket. 1. Check the coolant level and fill as required. DO NOT install the radiator cap. 2. Start and operate the engine until it attains normal operating temperature. 3. Turn the engine OFF. 4. Remove the fuel injector. 5. Set the piston of the cylinder to be tested at TDC on the compression stroke. 6. Perform cylinder compression test as stated. 7. As each cylinder is pressurized, listen for the air escaping through the EGR air flow control valve, tailpipe, and the oil filler cap opening. Check for bubbles in the pressurized coolant bottle. 8. All gauge pressure indications should be equal, with no more than 25% leakage. Refer to CYLINDER LEAKAGE DIAGNOSIS CHART below.