Visually inspect the fuel drillings and the water passages for restrictions or foreign material. Remove any obstructions. Visually inspect the valves and the valve springs…

Steam clean the cylinder heads, and dry with compressed air. Blow out all capscrew holes, fuel passages, and oil passages. Remove the gasket material from…

Inspect the rear cover for cracks or other damage. Measure the rear cover crankshaft seal bore. Replace the rear cover if the crankshaft seal bore…

Remove the gasket material from the rear cover gasket sealing surface. Use solvent to clean the rear cover. Dry with compressed air.

Use a mandrel or drift to remove the crankshaft oil seal.  

Use gear cover bushing mandrel, Part No. ST-598, to remove the accessory drive bushing. Support the oppo- site side of the cover. Measure the gear…

Visually inspect the gear cover for cracks or damage. Measure the accessory drive seal bore. NOTE: Replace the gear cover if the accessory drive seal…

Use a mallet and a mandrel or a drift to remove the front crankshaft seal and the accessory drive seal. Remove the straight thread o-ring…

NOTE: The accompanying chart lists different camshaft key part numbers, the degree of offset, and the approximate injector timing change from nominal. Use a plastic…