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 the head cover. 2. Remove the terminal nut which secures the har- ness to the injector. Terminal Nut 2 N m (0.2 kgf m, 1.5 lbf ft) 3. Remove the harness assembly from the injector. 4. Remove the leak off pipe. Harness 12 N m (1.2 kgf m, 8.9 lbf ft) 5. Rotate the crank pulley. Align the top dead center (TDC) mark on crank pulley with the top mark located on timing gear case. Injector T1V1-04-03-008 NOTE:
When rotating the crank pulley, remove the fan guard. Then, rotate the fan while hold- ing the fan belt. If it is difficult to rotate, remove all glow plugs and release compression pressure. 6. Check if piston No.1 (or piston No.4) is now posi- tioned at the TDC in the compression stroke. Leak Off Pipe NOTE: Move push rods for the intake and exhaust valves on the No.1 cylinder up and down by hand. If any clearances on the both ends of the push rods are found, piston No.1 is positioned at TDC in the compres- sion stroke. (If the exhaust valve of cylin- der No.1 is pushed down, piston No.4 is positioned at TDC in the compression stroke. 7.
Start measurement from the cylinder (No.1 or No.6) positioned at TDC in the compression stroke. T1V1-04-03-007 Top Mark Crank Pulley T1V7-04-03-001 TDC Mark T4-3-4