TM 10-3930-659-34 5-2. CYLINDER LINERS MAINTENANCE (Con’t). 5. Install flywheel turning tool (6) on engine (1). 6. Using flywheel turning tool (6), rotate flywheel until each piston is at bottom of cylinder liner (4).  Inspect cylinder head (7) for crosspatch pattern, pitting, and vertical scratches. 5-14