5063-5299 Engine

6V53N Engine for M113 APC

The 5063-5299 engine is a six-cylinder V6 configuration two-stroke diesel engine with 53cid (Cubic Inch Displacement) per cylinder with normal aspiration, Model 6V53N. The 6V53N engine has a total displacement of 318 cubic inches and can produce up to 210 brake horsepower.

The 6V53N engine is used within the M113A1 and M113A2 Families of the M113 Armored Vehicle Family. The 5063-5299 engine was introduced to the M113 Family of Vehicles to replace the original gasoline powerpack improving safety. The two-stroke diesel has a maximum speed of 2850 RPM and a small, light package compared to its maximum torque rating.

This engine has two NSNs for the engine with container. The difference between the two NSNs is the container part number.

Engine with Container
NSN: 2815-01-295-7458 / Part Number: 57K1000
Engine Container for 56K1000
NSN: 8145-01-232-9447 / Part Number: 11650202
Engine with Container
NSN: 2815-00-124-5390 / Part Number: 5703812
Engine Container for 5703812
NSN: 8145-00-138-7809 / Part Number: 11678210
Engine without Container (57K1000 or 5703812)
NSN: 2815-00-054-0244 / Part Number: 8738127

6V53N Engine Features

  • High Reliability
  • Wide Environmental Tolerance
  • Ease of Maintenance
  • High-Torque for Physical Size
  • Multi-Fuel Capable
  • Robust Design
5063-5299 Engine 6V53 for M113 APC
5063-5299 Engine 6V53 for M113 APC
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Normally Aspirated 2-Cycle Diesel Normally Aspirated 2-Cycle Diesel

On two-cycle diesel engines, normal aspiration refers to the engine having "neutral" air intake boost pressure. As 2-Stroke diesel engines do not have intake valves, a positive pressure must be generated to push the intake air into the cylinder which is provided by a supercharger, but the supercharger is not considered a pressure boost device as the induction of air into the cylinder causes a neutral average pressure in the intake system. In other engine models, one or more turbochargers are used to provide positive boosted intake pressures.

Supercharger NSN: 2990-01-122-7913
Supercharger Part Number: 23516736 (5103597 Early Model)
5063-5299 Engine 6V53N Blower
5063-5299 Engine 6V53N Blower

Speed Limiting Governor Speed Limiting Governor

5063-5299 engines are equipped with a speed-limiting governor. A speed limiting governor reduces the fuel injected into the cylinders once the desired maximum speed is reached. The 6V53N is well known to have a mode of failure called "run-away". Run Away occurs when the governor mechanism fails or is incorrectly adjusted. The fuel injectors of the 5063-5299 are sprung loaded to maximum fuel. The governor and its linkages must be functional to reduce the fuel to prevent run away where the engine will keep accelerating until the engine fails. The only way to stop run away once it is happening is to shut off the air supply to the engine intake.

Lubrication System Lubrication System

The 5063-5299 engine has a rotary oil pump located within a housing on the front of the engine directly driven by the crankshaft. The georotor pump has 1" wide pump gears and is driven on a spline on the crankshaft. Gerotor pumps use a trochoidal inner rotor and an outer rotor formed by a circle with intersecting circular arcs. A suction tube and screened pickup suck oil from the oil pan. There are two oil pressure regulating valves in the oil pump housing that regulate the engine oil pressure.

Oil Pump NSN: 2815-00-780-5218
Oil Pump Part Number: 5116070
5063-5299 Engine 6V53N Oil Pump
5063-5299 Engine 6V53N Oil Pump

Cold Starting Aid Cold Starting Aid

The 5063-5393 engine has an air box flame heater system as a cold starting aid when temperatures are below 40F (4C). The vehicle operator can operate the heating system remotely from their control station. When operated, a solenoid valve is opened allowing diesel fuel from the vehicle under pressure from the vehicle's electric fuel pumps to be fed to a spray nozzle located in the air box of the engine. An engine mounted electric air pump provides pressurized air to a nozzle in the air box of the engine. An engine mounted spark generator then provides high-voltage pulses to a spark plug adjacent to the fuel and air nozzles in the engine's air box. The fuel-air mixture is ignited repeatedly causing the intake air for the engine to be heated and assisting in cold starts.

Glow Plug Conversion Kit Glow Plug Conversion Kit

An upgrade kit is available for 6V53 engines to convert the air box flame heater system to a glow plug system. The glow plug system is more reliable and easier to maintain than the air box flame heater system and allows starting at a lower temperature. The glow plug system is lower maintenance and more reliable than the air box flame heater system.

The glow plug conversion kit includes cylinder heads, glow plugs, electrical harnesses and a new electronic glow plug controller.

Upgrade Kit for M113 Block 1 Engines
The glow plug conversion kit for engines including 5063-5299,5063-5392,5063-5397,5063-5398,5063-539F is NSN 2815-01-560-3817 / Part Number: 57K6588
Upgrade Kit for M113 Block 2+ Engines
The glow plug conversion kit for engine 5063-5393 is NSN 2815-01-653-9437 / Part Number: 57K8639