18 mm Remove the flywheel. Brass Drift Pin Warning: Wear eye protection when you drive the gear from the flywheel. Do not use a steel drift pin. Use the drift pin to drive the ring gear from the flywheel. Heat the new ring gear for 20 minutes in an oven preheated to 127°C [260°F]. Warning:… Read More »
NOTE: Omit this step if the removed gear housing was installed; proceed to page 7-143 and complete the installation of the rocker levers. The location of the timing pin assembly on the gear housing is critical for correct engine adjustments. Follow this procedure to install the assembly so that it corresponds to Top Dead Center… Read More »
Mark and trim 1.59 mm [1/16 inch] off of the new gear housing gasket. NOTE: When properly trimmed, the gear housing gasket should be even with the lubricating oil pan gasket when installed. Position the gasket on the alignment dowels. 10 mm Carefully install the gear housing, making sure both gaskets are in place. Torque… Read More »
If the gasket is tom, it may be repaired. Cut the torn gasket off even with the front of the cylinder block. Using the old gasket as a pattern, cut the front section of a new gasket to the same size. Use common thread or a very fine wire to hold the new gasket splice… Read More »
Clean the gasket material from the cylinder block. Inspect the lubricatin oil pan gasket. If it is not torn, coat with Three Bond 1207-C® sealant.
Preparatory Steps: • Remove the valve cover rocker levers and push rods. • Remove the vibration damper. Refer to Procedure (7-15). • Remove the camshaft. Refer to Procedure (7-19). • Remove the fuel pump. Refer to Procedures (5-35) or (5-37). 10 mm Remove the six front oil pan capscrews. 10 mm Remove the gear housing… Read More »
1/2 inch Drive, 3377371, Engine Barring Gear Locate Top Dead Center (TDC) for Cylinder Number 1 by barring crankshaft slowly while pressing on the engine timing pin. Service Tip: If the timing pin has been damaged and cannot be used to locate TDC, refer to Procedure 7-21. T-25 Torx Remove the timing pin assembly and… Read More »
Install the key. Lubricate the camshaft surface with Lubriplate 105 or equivalent. Caution: The camshaft gear will be permanently distorted if overheated. The oven temperature should never exceed 177°C I350°F]. Heat the camshaft gear for non bolted 91 ’ camshafts in an oven at 149°C [300°F] for 45 minutes. Heat the camshaft gear for bolted… Read More »
Inspect the camshaft bore for fretting or burrs. NOTE: If the fretting, burrs or raised material cannot be removed with Scotch-Brite® 7448 or equivalent, replace the camshaft gear. Inspect the camshaft gear keyway for burrs. Remove burrs with Scotch-Brite® 7448, or equivalent. NOTE: If the keyway is damaged or the burrs cannot be removed, the… Read More »
Remove the fan pulley. Remove the crankshaft pulley. Refer to Procedure (7-15). Remove the gear cover. Refer to Procedure (7-18). Remove the camshaft. Refer to Procedure (7-19). 18 mm On bolted camshafts, remove the camshaft bolt and washer. Bolted camshafts are only used on 1991 engines equipped with an inline pump. Remove the gear. Remove… Read More »