400E (124.034) V8-4.2L (119.975) (1992)
Timing Chain: Service and Repair
Replacing and Riveting Timing Chain
Preparation
-
Cylinder head (valve) covers removed.See: Cylinder Head Assembly/Valve Cover/Service 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 Tensioner/Service and Repair.
-
Remove right guide rail (2) at top, install (Fig. A). See: Timing Chain Guide/Service 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.
-
Slacken wedge (04) at exhaust camshaft sprocket slightly.
-
Rotate crankshaft in direction of rotation of engine with wrench socket (10); hold timing chain (4) or (5) meshed at inlet and exhaust camshaft
sprockets when performing this step.
CAUTION: Ensure that timing chain (4) or (5) does not jump off when turned.
-
Pull in new timing chain (5).
-
Pull out end (4) of old timing chain which has become free from chain housing.
-
Rotate crankshaft until the ends of the new timing chain (5) can be connected with the riveted link.
-
Fix new timing chain to camshaft sprockets with wedges (04) and (05).
-
Connect ends of new timing chain (6) with link (6) and center plate (7).