OPERATIONAL PERFORMANCE TEST / Engine Test VALVE CLEARANCE Summary: 1. Perform the measurement when the engine is cold. 2. Before starting any work, clean the head cover mounting area and avoid contamination in the engine. Preparation : 1. Remove bolt (2) from head cover (1). 2. Remove the cover from sight glass (3) on the flywheel housing. 3. Rotate the flywheel. Align the top dead center (TDC) mark on flywheel with pointer (4) in the flywheel housing. T4GB-04-03-023 NOTE: Rotate the flywheel in the following proce- dures. Method 1: Install the rotating tool ( Daim- lerChrysler 407-589-0063-00) (5) to sight glass (3) in the fly- wheel housing. Rotate the fly- wheel. Method 2:
Rotate the flywheel by using stop switch (6) and start switch (7) in upper on the engine. Turn the key switch ON. Push start switch (7). When the TDC mark is aligned with pointer (4), push stop switch (6) and stop the flywheel. If start switch (7) and stop switch (6) are pushed at the same time, the flywheel does not rotate. As this method burns the battery power, finish the work as soon as possible. 3 T4GB-04-03-022 Rotating Tool ( DaimlerChrysler 407-589-0063-00) 5 NOTE: If the intake and exhaust valves are closed, the cylinder is positioned at TDC in the compression stroke. T4GB-04-03-027 7 6 T4GB-04-03-024 T4-3-6 2 4