Technical Information · 0335 ENU 6/090

Service Technical Information 0335 ENU 6/090 • Cylinder liner damage (even “piston seizure”). • Damaged or displaced connecting rod bearings. • Loosened or loose fastening screw(s) on the crankshaft pulley. • Loosened or loose fastening screw(s) on the camshaft gear. • Loosened or loose connecting rod bolts. • Cracked timing chain(s). • Changed timing. • Irreparably damaged clutch elements (pressure plate and/or drive plate). • Vibrations and/or engine imbalance due to irreparably damaged clutch elements. • Vibrations around the transmission. • Defective synchronization. Information If such faults or symptoms are present together with engine damage, the VAL that was created must be checked for overspeed entries. If overspeed entries are found and if the difference between the current hourmeter and the status when the last overspeed event was recorded is less than 50 operating hours, there is a high probability that the damage was caused by overspeed event(s). The value “50 operating hours” should be seen as a guide. The possibility of engine damage occurring much later due to previous overspeed event(s) cannot be ruled out. RPM ranges - Create the VAL before deleting the fault memory. Overspeed events are documented as follows in 986 + 996: the VAL: RPM range 1: 7,200 -1 ... to 7,900 -1 Maximum permitted engine rpm exceeded; engine damage possible. RPM range 2: over 7,900 -1 Maximum permitted engine rpm exceeded; engine damage probable. Information Before starting engine repairs or granting a pre-owned car warranty: In the event of overspeed events in range 2, we recommend that you contact the Technical Hotline before starting repairs or granting a pre-owned car warranty in order to find out how to proceed and verify warranty coverage. RPM ranges Create the VAL before deleting the fault memory. Overspeed events are documented as follows in 987 + 997: the VAL: RPM range 1: 7,200 -1 ... to 7,500 -1 Maximum permitted engine rpm exceeded; engine damage possible. RPM range 2: 7,500 -1 ... to 7,700 -1 Maximum permitted engine rpm exceeded; engine damage possible. RPM range 3: 7,700 -1 ... to 7,900 -1 Maximum permitted engine rpm exceeded; engine damage possible. Apr 10, 2024 Page 2 of 4 AfterSales