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International D179 Engine

The International Harvester D179 is a heavy-duty, naturally aspirated, inline 3-cylinder diesel engine belonging to the IH Neuss engine family. Developed and produced by International Harvester in their Neuss facility in Germany, this wet-sleeved engine is renown for its high structural rigidity and reliability in agricultural and utility industrial applications, such as the International Harvester 484 utility tractor. Featuring a robust overhead valve layout and a heavy-duty four-main-bearing design, the engine is engineered for longevity and high torque delivery at lower operating ranges, typical of workshop manual classifications for heavy utility components.

Valve Configuration: Overhead valve (OHV) arrangement. Driven via a traditional gear-timed camshaft in the crankcase acting upon pushrods and valve lever (rocker) assemblies. System employs an adjustable mechanical valve lash clearance scheme managed under the top cylinder head cover. Bore and Stroke: The cylinder bore measures 3.86 inches (98 mm) paired with a piston stroke of 5.08 inches (129 mm). This highly undersquare stroke arrangement maximizes high torque efficiency. Total displacement is rated at 179 cubic inches (2.9 liters).

Fuel System: Utilizes a direct injection diesel distribution system governed by a timing-gear-driven, multi-plunger rotary injection pump: typically a Robert Bosch EP/VA or VE series distributor pump. Fuel is drawn through multi-stage primary and secondary fuel filters to remove particulates. High-pressure lines sequence fuel straight to the mechanical fuel injection nozzles seated within the cylinder head assembly to atomize fuel directly inside the combustion chambers.

Lubrication System: Full-pressure forced lubrication system supplied by a positive displacement, gear-driven external oil pump mounted to the engine frame. The oil circuit filters all internal lubricant through a replaceable full-flow spin-on cartridge filter assembly. Pressurized channels direct engine oil to the four crankshaft main bearings, connecting rod journals, camshaft lobes, and upper valve rocker assemblies.

Cooling System: Liquid-cooled forced-circulation design managed by a front-mounted centrifugal water pump. A high-capacity cooling circuit forces coolant through the block jacket to regulate temperature surrounding the wet cylinder liners. Thermal regulation is maintained using a dedicated mechanical wax-pellet thermostat coupled directly to the upper coolant return manifold.

General Technical Data

Engine Specifications

Engine Model ............... International Harvester D179
Engine Family ............... Neuss Diesel Series
Engine Type ............... 4-cycle inline 3-cylinder direct injection liquid-cooled diesel
Number of Cylinders ............... 3
Cylinder Arrangement ............... In-line
Engine Bore, in (mm) ............... 3.875 (98.425)
Engine Stroke, in (mm) ............... 5.0625 (128.587)
Displacement, cu.in (L) ............... 179 (2.93)
Rated Engine Power, hp (kW) ............... 37.3-50.0 (27.8-37.3)
Rated Engine Speed, rpm ............... 2200
Peak Torque ............... 130-145 lb-ft (176-197 Nm) at 1400-1600 rpm
Idle Speed, High, rpm ............... 2350-2450
Idle Speed, Low, rpm ............... 650-750
Aspiration Type ............... Naturally Aspirated
Compression Ratio ............... 16.0:1
Firing Order ............... 1-2-3
Combustion Chamber ............... Direct injection
Camshaft Drive ............... Helical gear train front-mounted arrangement
Valves per Cylinder ............... 2 overhead valves actuated by pushrods
Cylinder Block Type ............... Cast iron deep-skirt design
Cylinder Liners ............... Wet replaceable type sleeves
Cylinder Head Type ............... One-piece cast iron crossflow design
Lubrication System ............... Full-pressure circulation via gear pump
Oil Pump Type ............... Crankshaft gear-driven positive displacement
Oil Filter Type ............... Full-flow spin-on cartridge
Cooling System ............... Liquid-cooled pressurized bypass system
Water Pump Type ............... Belt-driven centrifugal type pump
Air Cleaner Type ............... Dry type dual-stage element with restriction indicator
Starting System ............... Electric starter motor excitation
Electrical System Voltage, V ............... 12
Alternator Output, A ............... 35-55

Fuel System

Injection Pump Model ............... Bosch VA or Bosch VE distributor type
Injection Pump Drive ............... Timing gear driven from front train
Injection Pump Timing ............... 12-16 deg BTDC
Fuel Injection Pressure, psi (bar) ............... 2900-3118 (200-215)
Fuel Transfer Pump Type ............... Plunger type integral to injection pump assembly
Fuel Filter Type ............... Primary water separator plus secondary spin-on filter
Fuel Supply Pressure, psi (bar) ............... 14.5-21.7 (1.0-1.5)
Injection Nozzle Type ............... Multi-hole multi-orifice spray design
Nozzle Holder Model ............... Bosch KB style assembly
Nozzle Opening Pressure, psi (bar) ............... 3118-3263 (215-225)
Governor Type ............... Mechanical centrifugal variable speed governor
Injection Tubing Inner Diameter, in (mm) ............... 0.078 (2.0)
Injection Tubing Outer Diameter, in (mm) ............... 0.236 (6.0)
Injection Pump Lubrication ............... Internal diesel fuel circulation method
Leak-off Pipe Diameter, in (mm) ............... 0.157 (4.0)
Nozzle Spray Angle ............... 150 deg conical pattern spread
Number of Nozzle Spray Holes ............... 4 distinct micro-orifices
Diameter of Nozzle Spray Holes, in (mm) ............... 0.011 (0.28)

Dimensions and Weight

Overall Length, in (mm) ............... 30.2 (770)
Overall Width, in (mm) ............... 22.4 (570)
Overall Height, in (mm) ............... 34.6 (880)
Dry Weight, lbs (kg) ............... 745 (338)
Wet Weight, lbs (kg) ............... 798 (362)

Maintenance Data

Service Information

Compression Pressure,Standard Limit, psi (bar) ............... 362-435 (25.0-30.0)
Maximum Compression Pressure Difference, psi (bar) ............... 29 (2.0)
Minimum Engine Oil Pressure at Idle, psi (bar) ............... 14.5 (1.0)
Normal Engine Oil Pressure Speed, psi (bar) ............... 43.5-58.0 (3.0-4.0)
Oil Pump Relief Valve Opening Pressure, psi (bar) ............... 58.0-65.2 (4.0-4.5)
Thermostat Opening Temperature Starters, F (C) ............... 174 (79)
Thermostat Fully Open Temperature Level, F (C) ............... 198 (92)
Radiator Pressure Cap Rating, psi (bar) ............... 7.0-10.0 (0.48-0.69)
Maximum Allowable Engine Oil Temperature, F (C) ............... 248 (120)
Normal Operating Water Temperature Range, F (C) ............... 180-203 (82-95)
Drive Belt Deflection Tension Value, in (mm) ............... 0.39-0.59 (10.0-15.0)
Intake Valve Clearance, Cold, in (mm) ............... 0.012 (0.30)
Exhaust Valve Clearance, Cold, in (mm) ............... 0.012 (0.30)

Engine Oil and Coolant

Engine Oil Type .................. SAE 30W, 10W-30, or 15W-40
API Service Classifications ......................... CD or CE
Engine Oil Capacity with Filter, qt (L) ............... 8.5 (8.0)
Engine Oil Capacity without Filter, qt (L) ............... 7.4 (7.0)
Cooling System Fluid Capacity, qt (L) ............... 12.7 (12.0)

Service Intervals

Change oil and filter ............... Every 100 hours
Inspect air cleaner ............... Every 50 hours
Service air cleaner ............... Every 500 hours
Replace fuel filter ............... Every 200 hours
Valve clearance adjustment ............... Every 400 hours
Fuel system inspection ............... Every 1000 hours
Change coolant ............... Every 1000 hours
Compression test ............... Every 1000 hours
Belt inspection ............... Every service cycle

Service Specifications

Cylinder Sleeve Internal Standard Bore, in (mm) ............... 3.8740-3.8756 (98.400-98.440)
Cylinder Sleeve Internal Wear Max Limit, in (mm) ............... 3.8818 (98.600)
Cylinder Sleeve Out-of-Round Max, in (mm) ............... 0.0019 (0.050)
Cylinder Sleeve Taper Maximum, in (mm) ............... 0.0019 (0.050)
Crankshaft Main Journal Diameter, in (mm) ............... 3.1484-3.1492 (79.970-79.990)
Crankshaft Main Bearing Oil Clearance, in (mm) ............... 0.0018-0.0041 (0.046-0.106)
Crankshaft End Play, in (mm) ............... 0.0031-0.0086 (0.080-0.220)
Con Rod Journal Diameter, in (mm) ............... 2.5185-2.5192 (63.970-63.990)
Con Rod Bearing Oil Clearance, in (mm) ............... 0.0014-0.0036 (0.036-0.092)
Con Rod Side Clearance, in (mm) ............... 0.0047-0.0094 (0.120-0.240)
Con Rod Bore Small End Bushing, in (mm) ............... 1.3385-1.3397 (34.000-34.030)
Con Rod Bore Big End Shell Seating, in (mm) ............... 2.6771-2.6779 (68.000-68.020)
Piston Skirt Outer Diameter, in (mm) ............... 3.8692-3.8708 (98.280-98.320)
Piston to Cylinder Sleeve Clearance, in (mm) ............... 0.0039-0.0055 (0.100-0.140)
Piston Pin Bore Diameter in Piston, in (mm) ............... 1.2599-1.2603 (32.002-32.012)
Piston Pin Outer Diameter, in (mm) ............... 1.2596-1.2598 (31.995-32.000)
Piston Pin Clearance in Piston Structure, in (mm) ............... 0.0001-0.0006 (0.002-0.017)
Piston Pin Clearance in Con Rod Bushing, in (mm) ............... 0.0007-0.0015 (0.020-0.040)
Top Ring Groove Width, in (mm) ............... 0.0956-0.0964 (2.430-2.450)
Second Ring Groove Width, in (mm) ............... 0.0952-0.0960 (2.420-2.440)
Oil Ring Groove Width, in (mm) ............... 0.1976-0.1984 (5.020-5.040)
Top Ring Side Clearance, in (mm) ............... 0.0027-0.0043 (0.070-0.110)
Second Ring Side Clearance, in (mm) ............... 0.0019-0.0035 (0.050-0.090)
Oil Ring Side Clearance, in (mm) ............... 0.0011-0.0027 (0.030-0.070)
Top Ring End Gap, in (mm) ............... 0.0118-0.0196 (0.300-0.500)
Second Ring End Gap, in (mm) ............... 0.0098-0.0177 (0.250-0.450)
Oil Ring End Gap, in (mm) ............... 0.0098-0.0157 (0.250-0.400)
Cylinder Head Flatness Distortion, in (mm) ............... 0.0039 (0.100)
Cylinder Block Deck Surface Flatness, in (mm) ............... 0.0039 (0.100)
Intake Valve Stem Diameter, in (mm) ............... 0.3523-0.3531 (8.950-8.970)
Exhaust Valve Stem Diameter, in (mm) ............... 0.3511-0.3520 (8.920-8.940)
Intake Valve Stem to Guide Clearance, in (mm) ............... 0.0011-0.0027 (0.030-0.070)
Exhaust Valve Stem to Guide Clearance, in (mm) ............... 0.0023-0.0039 (0.060-0.100)
Valve Guide Internal Diameter, in (mm) ............... 0.3543-0.3551 (9.000-9.020)
Valve Face Angle, deg ............... 45
Valve Seat Angle, deg ............... 45
Valve Spring Free Length, in (mm) ............... 2.125 (54.0)
Camshaft Journal Diameter (Front), in (mm) ............... 1.9665-1.9673 (49.950-49.970)
Camshaft Journal Diameter (Center), in (mm) ............... 1.9468-1.9476 (49.450-49.470)
Camshaft Journal Diameter (Rear), in (mm) ............... 1.9074-1.9082 (48.450-48.470)
Camshaft Bushing Internal Diameter, in (mm) ............... 1.9685-1.9704 (50.000-50.050)
Camshaft Bearing Clearance Wear Limit, in (mm) ............... 0.0059 (0.150)
Camshaft Axial End Play, in (mm) ............... 0.0039-0.0098 (0.100-0.250)
Cam Lobe Height (Intake), in (mm) ............... 1.5433-1.5472 (39.200-39.300)
Cam Lobe Height (Exhaust), in (mm) ............... 1.5433-1.5472 (39.200-39.300)
Rocker Arm Shaft Outer Diameter, in (mm) ............... 0.7862-0.7870 (19.970-19.990)
Rocker Arm Bushing Internal Diameter, in (mm) ............... 0.7874-0.7885 (20.000-20.030)
Rocker Arm Shaft Oil Clearance, in (mm) ............... 0.0004-0.0023 (0.010-0.060)
Tappet Pushrod Lifter Outer Diameter, in (mm) ............... 0.6283-0.6291 (15.960-15.980)
Tappet Lifter to Bore Clearance, in (mm) ............... 0.0007-0.0027 (0.020-0.070)

Tightening Torques

Cylinder Head Bolts, lb-ft (Nm) ............... 90 (122.0)
Connecting Rod Cap Bolts, lb-ft (Nm) ............... 45 (61.0)
Main Bearing Cap Waisted Bolts, lb-ft (Nm) ............... 80 (108.0)
Main Bearing Cap Waisted Bolts, lb-ft (Nm) ............... 100 (136.0)
Main Bearing Cap Parallel Bolts, lb-ft (Nm) ............... 105 (142.0)
Main Bearing Cap Parallel Bolts, lb-ft (Nm) ............... 140 (190.0)
Flywheel to Crankshaft Bolts, lb-ft (Nm) ............... 110 (149.0)
Crankshaft Pulley Hub Bolt, lb-ft (Nm) ............... 18.5 (25.0)
Exhaust Manifold Stud Nuts, lb-ft (Nm) ............... 28 (38.0)
Nozzle Holder Stud Nuts, lb-ft (Nm) ............... 12 (16.0)
Valve Lever Bracket Clamping Screw, lb-in (Nm) ............... 97 (11.0)
Side Cover Screws, lb-in (Nm) ............... 150 (17.0)
Injection Pump Drive Gear Nut (M12), lb-ft (Nm) ............... 44-51 (60.0-70.0)
Injection Pump Drive Gear Nut (M14), lb-ft (Nm) ............... 62-73 (85.0-100.0)

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