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Mitsubishi S12 diesel engine detects and adjusts valve clearance


Detailed Description:

Mitsubishi S12 diesel engine detects and adjusts valve clearance

The valve clearance is adjusted when the Mitsubishi S12 diesel engine is cold.

Note: (a) From the side of the camshaft of the Mitsubishi S12 diesel engine to the cylinder head of the Mitsubishi S12 diesel engine, the left is the intake valve and the right is the exhaust valve. (b) The standard value of valve clearance is indicated on the nameplate of the rocker cover of No.1 Mitsubishi S12 diesel engine cylinder.

Test items

standard value

Valve clearance

Intake

0.6mm

exhaust

0.8mm

(1) During the test, the crankshaft of the Mitsubishi S12 diesel engine should be rotated in the forward rotation direction in accordance with the ignition sequence, and the measurement should be performed at the position where the Mitsubishi S12 diesel engine cylinder is at the top dead center of compression.

(2) Mitsubishi S12 diesel engine cylinder compression top dead center position is marked on the Mitsubishi S12 diesel engine shock absorber with the pointer, and the ejector lever is not in the rocker arm to open the Mitsubishi S12 diesel engine intake and exhaust valve This state is the compression top dead center of the Mitsubishi S12 diesel engine cylinder.

(3) While inserting the thickness gauge measurement gap between the rocker arm and the bridge friction top piece, adjust the adjustment screw to the extent that the thickness gauge feels slightly tight but can be pulled.

(4) After adjustment, tighten the lock nut according to the specified torque, and check the clearance again.

5.14 Confirmation and Adjustment of Fuel Injection Timing of Mitsubishi S12 Diesel Engine

5.14.1 Confirmation of Mitsubishi S12 Diesel Engine Fuel Injection Timing Regulation

The fuel injection timing of Mitsubishi S12 diesel engine varies according to the output power, speed and specifications of Mitsubishi S12 diesel engine. It must be confirmed on the instruction plate of No.1 rocker cover.

Confirmation of fuel injection timing of Mitsubishi S12 diesel engine

(1) Turn the crankshaft of Mitsubishi S12 diesel engine from the positive steering wheel, and stop at the front and rear positions of 10 ° of the injection timing of Mitsubishi S12 diesel engine specified in No.1 Mitsubishi S12 diesel engine cylinder. At this time, confirm that the engraved line "0" of the flywheel of the Mitsubishi S12 diesel engine fuel injection pump on the right Mitsubishi S12 diesel engine is near the pointer.

Note: At this time, if the intake and exhaust valve clearances of No. 1 Mitsubishi S12 diesel engine cylinders are all specified values, the valves are not depressed. The valve was depressed near the top dead center of the exhaust.

(2) Slowly turn the car forward to make the Mitsubishi S12 diesel engine fuel injection timing (injection start time) ruled on the shock absorber of the Mitsubishi S12 diesel engine coincide with the pointer of the Mitsubishi S12 diesel engine. At this time, the engraved line and pointer of the Mitsubishi S12 diesel engine fuel injection pump Mitsubishi S12 diesel engine flywheel are aligned with the pointer, which is the prescribed Mitsubishi S12 diesel engine injection timing setting. When the engraved line and pointer of the symbol "0" deviate, the fuel injection timing of the Mitsubishi S12 diesel engine is adjusted.

Note: For the left fuel injection pump, crank the gear to the position before the compression top dead center of No.7 cylinder, and then follow the same sequence.

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