01-015 Testing cylinder leaktightness Total pressure loss max. 25% Data At valves and cylinder head gasket max. 10% At pistons and piston rings max. 20% Tightening torque Nm Spark plugs Special tools Commercial tool Cylinder leaktightness tester e. g. Bosch, EFAW 210 A Sun, CLT 228 Testlng 1 Run engine until at normal operating temperature. 2 Blow out spark plug recesses with compressed air. 3 Remove spark plugs. 01.0904 - 01511