wc_tx004063gb_FM10.fm36RammerTroubleshooting3.6 Conducting a Leak-Down TestRequirements ■ Leak down tester■ Torque wrenchProcedure Perform the procedure below to conduct a leak-down test.1. Remove the spark plug (a).2. Set the piston at TDC using the starter rope.3. Connect the leak-down tester (b) to the engine at the spark plug hole.4. Set the regulator of the air supply to 100 psi. Test the engine leak down usingthe instruction of the leak-down tester.Does the engine hold the pressure?Result The engine air leakage has now been checked.Yes ____ No ____The air leakage is OK.Re-install the spark plug. Torque the sparkplug to 35–41 Nm (25.8–30.2 ft.lbs.).There is too much air leakage.Rebuild the engine.wc_gr013050ab
