Engine Description
Note: When you order parts, always refer to the serial number that is stamped on the identification plate on the right rear side of the engine.
The engine is a diesel engine which is controlled with a mechanically actuated fuel injection pump. The four engine cylinders are arranged in-line.
The cylinder head assembly has one inlet valve and one exhaust valve for each cylinder. Each valve has a single valve spring and an oil seal.
The pistons have two compression rings and an oil control ring.
The correct piston height is important in order to ensure that the piston does not contact the cylinder head. The correct piston height also ensures the efficient combustion of fuel which is necessary in order to conform to requirements for emissions. The piston must not be machined in order to obtain the correct piston height.
The crankshaft has five main journal bearings. End play of the crankshaft is controlled by two thrust washers. The thrust washers are located on both sides of the number four main bearing.
The timing case is made of aluminum. The timing gears are stamped with timing marks in order to ensure the correct assembly of the gears. The mark on the crankshaft pulley is aligned with the mark on the timing case when the No. 1 piston is at the top center position on the compression stroke. There is no timing mark on the rear face of the timing case.
The crankshaft gear turns the idler gear which then turns the camshaft gear for the valves and the fuel injection pump. Also, the crankshaft gear turns the gear of the engine oil pump.
The engine oil relief valve is installed into the engine oil pump through a hole in the timing case.
The fuel injection pump fits directly into the cylinder block. The fuel rack, the plungers, and the barrels are inside of the fuel injection pump.
The fuel injection pump timing, the low idle, and the high idle are preset at the factory. Adjustments to the pump timing and idle rpm should only be made by personnel which have had the correct training.
Engine coolant is driven by a gear-driven water pump. The temperature is regulated by a water temperature regulator.
Lifting the Engine
| NOTICE |
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Failure to follow recommended procedures for handling or transporting engines can lead to engine damage. To avoid possible engine damage, use the following procedure. |
When you are lifting or moving the engine, use the following procedures in order to prevent engine damage.
- Do not tilt the engine to an extreme angle unless the lubricating oil is first drained from the oil pan.
- Do not turn the engine onto a side or an end surface unless the lubricating oil is first drained from the oil pan.
- If the oil is not drained prior to tilting the engine or turning the engine onto a side or an end surface, the lubricating oil from the oil pan can flow into the inlet manifold and the cylinder bores. This situation could cause a hydraulic lock in the engine. Hydraulic lock can damage the engine.
- The engine oil should be refilled to the correct level before the engine is started.
Model Views of the Naturally Aspirated 3034 Marine Engine
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| Illustration 1 | g00899021 |
Left side view (1) Expansion tank and water cooled exhaust manifold (2) Engine oil filler cap (3) Front lift bracket (4) Water temperature regulator housing (5) Heat exchanger (6) Alternator (7) Fuses (8) Jacket water pump (9) Connection for the sea water inlet (10) Drive belt (11) Gear selector for the marine transmission (12) Electric starting motor (13) Crankshaft pulley (14) Auxiliary water pump (15) Drain plug | |
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| Illustration 2 | g00899025 |
Right side view (16) Coolant filler cap (17) Valve mechanism cover (18) Air cleaner (19) Rear lift bracket (20) Fuel injection nozzle (21) Glow plug (22) Fuel injection pump (23) Water cooled exhaust outlet (24) Marine transmission oil cooler (25) Fuel shutoff solenoid (26) Inlet manifold (27) Fuel transfer pump (28) Manual sump pump for removing the engine oil (29) Engine oil level gauge (30) Fuel filter (31) Marine transmission oil level gauge (32) Ground connection (33) Engine oil filter (34) Engine oil pan (35) Marine transmission (36) Marine transmission oil drain plug | |
Model Views of the Turbocharged 3034 Marine Engine
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| Illustration 3 | g00898914 |
Left side view (1) Expansion tank and water cooled exhaust manifold (2) Engine oil filler cap (3) Front lift bracket (4) Water temperature regulator housing (5) Heat exchanger (6) Alternator (7) Fuses (8) Jacket water pump (9) Connection for the sea water inlet (10) Marine transmission oil level gauge (11) Gear selector for the marine transmission (12) Drive belt (13) Electric starting motor (14) Crankshaft pulley (15) Auxiliary water pump (16) Engine oil pan | |
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| Illustration 4 | g00898913 |
Right side view (17) Glow plug (18) Coolant filler cap (19) Rear lift bracket (20) Valve mechanism cover (21) Turbocharger (22) Fuel injection nozzle (23) Water cooled exhaust outlet (24) Engine oil level gauge (25) Air cleaner (26) Fuel injection pump (27) Inlet manifold (28) Fuel shutoff solenoid (29) Marine transmission oil cooler (30) Fuel transfer pump (31) Manual sump pump for removing the engine oil (32) Engine oil filter (33) Fuel filter (34) Ground connection (35) Marine transmission (36) Drain plug | |