Download Preparation Cylinder head (valve) covers removed.See: Valve CoverService and Repair Viscous fan clutch removed, refer to cooling System. Spark plugs removed. Overview Set piston of cylinder 1 to 45°before ignition TDC. Fix right cylinder head inlet, exhaust camshafts with pins, special tool 111 589 01 15 00 (01), Fig. A. Remove chain tensioner. See: Timing Chain TensionerService and Repair. Remove right guide rail (2) at top, install (Fig. A). See: Timing Chain GuideService and Repair Lock timing chain to camshaft sprockets with wedges, special tool 110 589 03 59 00 (04) and (05), at right cylinder head (Fig. B). Cover chain housing cover with clean shop towels to prevent debris from falling into engine. Grind chain pin of timing chain (4) between inlet and exhaust camshaft sprockets open (Fig. C), Pry plate (8) of timing chain (4) off with a screwdriver (Fig. D). Push out ground-open double link. Connect new timing chain (5) to old timing chain (4) with riveted link (6) and middle plate (7) (thickness 1.6 mm) and ground open outer plate (8). Remove pins (01). Remove wedge (5) at inlet camshaft Hold timing chain meshed at inlet and exhaust camshaft sprockets by hand when performing this step.