Mitsubishi S16R-Y1PTA-2 Engine

⚠ Keep oil and grease away from the belt.

⚠ Excessive V-belt tension can cause rapid wear of the alternator bearing.

Tools: Wrenches, Belt tension gauge

1. Inspect V-belt for wear, cuts or surface separations; replace with a new belt if defective.
2. Push the belt downward with about 49 +/- 5 N midway between pulleys; deflection should be 7 +/- 1 mm for new belt and 9 +/- 1 mm for retightening.
3. Remove the alternator front cover and V-belt cover.
4. Loosen all the retaining bolts on the alternator and adjusting rod.
5. Loosen the upper and lower lock nuts on the adjusting rod (the lower nut has left-hand threads).
6. Turn the adjusting rod to adjust V-belt tension, then tighten the upper and lower lock nuts.
7. Tighten all the retaining bolts and reinstall the belt cover and alternator front cover.

⚠ If the priming pump cap is not firmly tightened, the cap may be ejected causing fuel flow-out; over-tightening (120 degrees or more) can damage the pump head.

Tools: Wrench

1. Finger tighten the priming pump cap.
2. Mark this position on the cap.
3. Tighten the cap further by 90 +/- 10 degrees with a wrench.
4. Make sure the head packing is not protruding.

⚠ Wipe off spilled fuel thoroughly; spilled fuel is a fire hazard.

⚠ Do not close all air vent plugs before locking the priming pump cap.

1. Loosen the air vent plug on the fuel filter intake for the left bank cylinder about 1.5 turns.
2. Turn the priming pump cap counterclockwise to unlock, and prime the fuel filter.
3. When fuel from the air vent plug is free from air bubbles, stop priming and tighten the plug to specified torque.
4. Loosen the air vent plug on the fuel filter outlet about 1.5 turns and bleed as above.
5. Bleed the fuel filters for the right bank cylinders the same way.
6. Loosen the air vent cock on the fuel injection pump about 1.5 turns.
7. Prime until fuel flow is free from bubbles, lock the priming pump cap and tighten the air vent plug.
8. Repeat the same procedure for the fuel injection pump on the other side.

⚠ Do not use the filter wrench to install fuel filters.

⚠ Do not use a filter with a dent on its case.

Tools: Filter wrench, Drip pan, Cloth

1. Clean the area around the fuel filters and place a drip pan under them.
2. Using a filter wrench, remove the fuel filters.
3. Wipe off fuel on the fuel filter cartridge mounting surface of the filter bracket.
4. Check new fuel filters for proper seating of the gaskets.
5. Apply clean fuel to the gaskets and install fuel filters by hand.
6. Bleed the fuel filter.
7. Start the engine and let it idle several minutes, then check the mounting sections for fuel leakage.

⚠ Never wash and reuse oil filters, as their elements are paper type.

⚠ Always replace gaskets with new ones.

Tools: Filter wrench, Drip pan, Container

1. Clean the area around the oil filters and place a drip pan under the oil filters and bypass oil filter.
2. Using a filter wrench, remove the oil filters and bypass oil filter.
3. Disassemble the removed filters and check elements for metal particles.
4. Wipe off oil on the oil filter mounting surface of the filter bracket.
5. Check new filters for proper gasket seating and apply clean engine oil to the gaskets.
6. Install the oil filters and bypass oil filter; when the gasket contacts the bracket, further rotate 3/4 to a full turn.

⚠ If the color of exhaust gas is abnormal, also conduct inspections of the turbocharger.

1. Check the turbocharger when the engine is cold and the compressor wheel is not rotating.
2. Disconnect the pipe from the air inlet side.
3. Hold the compressor wheel nut by hand and turn the wheel.
4. Check for looseness and abnormal noise; replace the bearings if found.

⚠ Never service the air cleaner while the engine is running.

Tools: Compressed air, Light bulb, Safety glasses, Hard hat, Gloves

1. Remove the air cleaner cap or wing nut and remove the air cleaner element from the body.
2. Blow compressed air (0.69 MPa [7 kgf/cm2] [100 psi] or lower) onto the inside surface of the element.
3. Blow dry compressed air onto the outside surface from a distance along the pleats.
4. Place a light bulb to illuminate inside the element and check for cuts, pinholes or local wear.
5. Replace the element with a new one if defects are found.
6. Reinstall the element and reset the indicator by pressing the reset button.

⚠ Remove the radiator cap only after the engine is cooled to room temperature.

⚠ Coolant containing LLC is toxic; never dispose of it into regular sewage.

Tools: Coolant receiving cans, Cloth

1. When draining immediately after operation, idle at low idling speed for 5 to 6 minutes to lower coolant temperature to 70 to 80 deg C.
2. Open the radiator cap.
3. Place coolant receiving cans under the drain cocks on the engine and water pump, and open the drain cocks.
4. Close drain cocks and plugs.
5. Pour non-corrosive cleaning solution into the cooling system, operate at 800 to 900 min-1 for about 15 minutes, then drain.
6. Pour fresh water, operate at 800 to 900 min-1 for about 10 minutes, and repeat rinsing until draining water is clean.
7. Pour in undiluted LLC, then water slowly to the full level, and close the radiator cap securely.
8. Shut off fuel and crank the engine about 10 seconds; wait about 1 minute and repeat to remove air from the water pump.

Tools: Oil level gauge, Cloth

1. Reinstall the drain plug and remove the oil filler cap.
2. Fill the engine oil pan with specified engine oil to the specified level.
3. Check that the oil level is between the MAXIMUM and MINIMUM marks on the oil level gauge.
4. Add oil of the specified type if low, and check the oil pan and other parts for oil leakage.
5. Shut off the fuel supply and crank the engine for about 10 seconds, then wait about 1 minute.
6. Crank the engine again to circulate oil, then recheck the oil level and add oil as needed.

⚠ Post a sign warning that the rust-preventive oil must be replaced with engine oil and the fuel tank filled with fuel before operating the engine.

Tools: Adhesive cloth tape, Polyethylene sheet, Desiccants

1. Drain engine oil and pour in rust-preventive oil (NP-10-2) into the engine.
2. Prepare a fuel mixture containing 50% rust-preventive oil (NP-9) and fill the fuel tank with it.
3. Operate the engine at 800 to 1000 min-1 (idling) for 5 to 10 minutes under no load.
4. Immediately before stopping, spray volatile corrosion inhibitor (V.C.I.) through the inlet port.
5. With the engine stopped, drain the fuel mixture from the fuel tank.
6. Apply rust-preventive oil (NP-3) liberally on exposed machined sections.
7. Seal air inlet, exhaust outlet, breather and other openings with adhesive cloth tape.
8. Loosen V-belt, seal starter and alternator terminals, charge the battery and store in a cool dry room.

⚠ To crank the engine, shut off the fuel supply to the engine and operate the starters.

1. Remove the cover from the engine and connect a fully charged battery.
2. Remove the covers from the starters and alternator, and adjust the tension of the V-belt.
3. Remove sealing tapes from the openings of the engine.
4. Drain rust-preventive oil and pour in appropriate engine oil.
5. Fill the fuel tank with fuel and bleed the fuel system.
6. Remove the rocker covers and lubricate the valve mechanisms.
7. Shut off the fuel supply and crank the engine about 10 seconds, repeated 3 times at intervals of about 1 minute.
8. Make sure the engine oil pressure rises, start the engine, warm up sufficiently, then apply load.

1. Return the starter switch to the OFF position.
2. Add fuel to the fuel tank.
3. Bleed the fuel system.
4. Restart the engine.