Cylinder Leak Down Test
STANDARD PROCEDURE - CYLINDER LEAK DOWN TEST1. Warm engine to operating temperature.
WARNING: DO NOT OPEN COOLING SYSTEM UNLESS COOLANT TEMPERATURE IS BELOW 9°C (194°F). RISK OF INJURY TO SKIN AND EYES AS A RESULT OF SCALDING WITH HOT COOLANT WHICH SPLASHES OUT. RISK OF POISONING FROM SWALLOWING COOLANT. OPEN CAP SLOWLY AND RELEASE PRESSURE. STORE COOLANT IN PROPER CONTAINERS ONLY. WEAR PROTECTIVE GLOVES, CLOTHING AND EYE PROTECTION.
NOTE: Turn cap carefully as far as first detent, release pressure, then unscrew cap.
2. Open cooling system cap at coolant recover pressure container.
3. Remove engine cover.
4. Unscrew oil filler cap.
5. Remove glow plugs.
NOTE: Crank engine at crankshaft in direction of rotation of the engine (clockwise).
6. Position cylinder to be tested to ignition Top Dead Center (DTC).
NOTE: Calibrate cylinder leak down tester and remove check valve in screw-in fitting.
7. Connect cylinder leak down tester and follow INSPECTING Instruction.
INSPECTING
NOTE: If crankshaft rotates, install retaining lock for crankshaft/ring gear.
1. Pressurize cylinder with compressed air and read off pressure loss at cylinder leak tester. If excessive pressure loss exists, determine possible cause.
NOTE: If the retaining lock is installed, remove it, rotate engine and install lock once again.
2. Carry out test of other cylinders in the firing order of engine.
CYLINDER LEAK DOWN VALUES