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(4) A controlled hone motor speed between 200 and 300 RPM is necessary to obtain the proper cross- (5) After honing, it is necessary that the block be cleaned to remove all traces of abrasive. Use a brush HYDROSTATIC LOCK When an engine is suspected of hydrostatic lock (regardless of what caused the problem), follow the (1) Perform the Fuel Pressure Release Procedure (refer to Group 14, Fuel System). (2) Disconnect the battery negative cable. air cleaner, induction system and intake manifold to ensure system is dry and clear of (4) Place a shop towel around the spark plugs to catch any fluid that may possibly be under pressure CAUTION: DO NOT use the starter motor to rotate (5) With all spark plugs removed, rotate the crank- shaft using a breaker bar and socket. (6) Identify the fluid in the cylinders (i.e. coolant, fuel, oil, etc.). (7) Make sure all fluid has been removed from the cylinders. (8) Repair engine or components as necessary to prevent this problem from occurring again. (9) Squirt engine oil into the cylinders to lubricate the walls. This will prevent damage on restart. (10) Install new spark plugs. filter. (12) Install the drain plug. Tighten the plug to 34 N·m (25 ft. lbs.) torque. (13) Install a new oil filter. engine crankcase with the specified amount and grade of oil. (15) Connect the negative cable to the battery. VALVE TIMING (1) Turn crankshaft until the No.6 exhaust valve is closing and No.6 intake valve is opening. (2) Insert a 6.350 mm (1/4 inch) spacer between rocker arm pad and stem tip of No.1 intake valve. (3) Install a dial indicator so plunger contacts valve spring retainer as nearly perpendicular as pos- (4) Rotate the crankshaft clockwise (normal run- ning direction) until the valve has lifted 0.863 mm CAUTION: DO NOT turn crankshaft any further If reading is not within specified limits: • Inspect timing chain for wear. • Check accuracy of DC mark on timing indicator. VALVE SERVICE VALVE CLEANING Clean valves thoroughly. Discard burned, warped and cracked valves. Remove carbon and varnish deposits from inside of valve guides with a reliable guide cleaner. VALVE INSPECTION Measure valve stems for wear. If wear exceeds 0.051 mm (0.002 inch), replace the valve. VALVE GUIDES Measure valve stem guide clearance as follows: valve stem and install valve (Fig. 17). The special Fig. 17 Positioning Valve with Tool C-3973 1 – VALVE DN 5.2L ENGINE 9 - 95 SERVICE PROCEDURES (Continued) |