Remove the timing gearcase cover. (See Timing Gearcase Cover Removal And Installation on Page 70-100-7.) Remove the idler gear. (See Idler Gear And Camshaft Removal…

When the gears are installed, check the backlash of the gears. Install a dial indicator [Figure 70-100-42]. Hold one gear while turning the other gear…

Measure the O.D. of the idler gear shaft [Figure 70-100-39]. Measure the I.D. of the idler gear bushing [Figure 70-100-39]. If the clearance exceeds the…

Measure the camshaft bearing in the engine block [Figure 70-100-35]. Measure the camshaft journal [Figure 70-100-36]. Calculate the oil clearance. If the clearance exceeds the…

Remove the timing gearcase cover. (See Timing Gearcase Cover Removal And Installation on Page 70-100-7.) Remove the snap ring (Item 3) from the idler gear…

Remove the fuel injection pump. (See Fuel Injection Pump Removal And Installation on Page 70-70-6.) Remove the cylinder head, rocker arms and push rods. (See…

Measure the rocker arm I.D. (Item 1) [Figure 70-100-22] with the inside micrometer. Measure the rocker arm shaft O.D. (Item 2) [Figure 70-100-22] with a…

Measure the length of the valve spring. If the measurement is less than the allowable limit, replace the spring [Figure 70-100-20]. Put the spring on…

Grind the valve face to the correct angle using a valve refacer [Figure 70-100-17]. Grind the valve seat surface in the cylinder head to the…

Remove the valve and spring from the cylinder head. (See Cylinder Head Disassembly And Assembly on Page 70-100-2.) Clean the valve seat and combustion chamber.…