![]() Now #6 cylinder is on compression stroke and adjusting the remaining valves can be completed. With the #1 cylinder on compression stroke adjust #1 #2 #3 #6 #7 #10 valves to. This will indicate #1 Cylinder is on the compression stroke and half of the engine valves are ready for adjustment.Īn easy way to explain which valves need to be adjusted it to number the valves 1 to 12 starting from the front of the head. The #6 cylinder valves (at TDC with #1 cylinder) will be on the exhaust stroke with no valve clearance. Line up the notch on the belt pulley and check to see if the the #1 valves are loose. On the timing cover there is TDC cast into the housing. This is important because the connector is part of the harness that controls the injectors. Once the valve cover is ready to be removed be sure to push the harness connection inside of the valve cover by moving the retaining clips that secure it to the round opening in the cover. Getting access from inside the cab makes it easier to adjust valves at the rear of the head. ![]() On a school bus application it’s much easier to remove the doghouse in the cab to have the ability to get to the back end of the valve cover. The valve cover is aluminum cast and heavy since it also serves as the air intake manifold. This will make room to remove the valve cover fasteners. With the harness removed the ECU is next (10 mm socket) followed by the mounting plate (4 valve cover stud nuts and one fastener on the block). ![]() This is a multi-pin connector so care has to be taken. The ECU assembly can be removed starting with the wiring harness connector using a 1/4 inch square drive ratchet and extension. Once the charge air piping and dog house is removed working on the valve cover removal is much easier. This step adds time to the valve adjustment but necessary to gain access to the valves. ![]() ![]() The DT 466 E (electronic) diesel engine is controlled by an ECU (engine control unit) which has to be removed before adjusting the engine valves. The International DT 466E Diesel Engine – Steps Required To Adjust Valves ![]()
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