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Yanmar 4TNE84 Engine

General Technical Data

Yanmar 4TNE84 Engine Specifications

Engine Model .......... Yanmar 4TNE84
Engine Type .......... Vertical, four-stroke water-cooled diesel
Number of Cylinders .......... 4
Engine Bore, in (mm) .......... 3.32 (84.0)
Engine Stroke, in (mm) .......... 3.56 (90.0)
Displacement, (L) .......... 1.995
Maximum Engine Power, hp (kW) .......... 40.4 (30.1)
Maximum Engine Speed, rpm .......... 3000
Fast Idle Speed, rpm .......... 2875
Slow Idle Speed, rpm .......... 950
Maximum Torque, Nm (lb-ft) .......... 126.8 (93.5)
Firing Order .......... 1-3-4-2
Direction of Rotation .......... Counterclockwise (viewed from flywheel)
Combustion System .......... Special swirl pre-combustion chamber
Compression Ratio .......... 18:1
Compression Pressure, MPa .......... 3.24±0.1
Air Cleaner .......... Dry Type with Safety Element

Fuel System

Fuel Type .......... Diesel Fuel
Fuel Diesel Type .......... Diesel No.1 or No.2
Fuel Pump Type .......... Mechanical
Fuel Delivery .......... In-line indirect injection
Fuel Filter .......... Replaceable Element
Fuel Injection Timing (FlD, B.T.D.C.) deg .......... 16±1
Fuel injection Pressure, MPa .......... 19.6
Governor .......... Mechanical centrifugal

Lubrication System

Lubrication System Type .......... Forced lubrication with trochoid pump
Oil Filter .......... Single Element
Lubricating Oil Capacity, qt (L) .......... 5.6 (5.3)

Cooling System

Cooling System Type .......... Liquid cooling / Radiator
Cooling System Capacity, qt (L) .......... 5.8 (6.1)
Cooling Fan Type .......... Pusher
Cooling Fan Number of Blade .......... 6
Cooling Fan Diameter, in (mm) .......... 14.6 (370)

Electrical System

Electrical System Rating, Volts .......... 12
Starting system .......... Electric Starter
Starter Rating .......... 2.0 kW (12-Volt)
Charging System .......... Alternator
Alternator Rating, Amp .......... 20
Battery .......... 650 CCA (cold cranking amps)

Dimensions

Width, in (mm) .......... 19.7 (499)
Height, in (mm) .......... 24.4 (618)
Depth, in (mm) .......... 26.0 (658)
Weight, lbs (kg) .......... 375 (170)

Yanmar 4TNE84 Maintenance Data

Engine oil type .......... SAE 15W-40/5W-30
Engine oil capacity, qt (L) .......... 5.6 (5.3)
Coolant capacity, qt (L) .......... 6.1 (5.8)
Oil filter change interval .......... Every 200 hours
Oil change interval .......... Every 200 hours
Fuel filter change interval .......... Every 500 hours

Yanmar 4TNE84 Service Specifications

Cylinder head and valves

Cylinder head combustion surface distortion, mm (in) .......... 0,05 (0,0020)
Intake valve seat angle, degrees .......... 120
Exhaust valve seat angle, degrees .......... 90
Intake valve seat width, mm (in) .......... 1,07-1,24 (0,0423-0,0490)
Exhaust valve seat width, mm (in) .......... 1,24-1,45 (0,0490-0,0573)
Intake valve alve stem outside diameter, mm (in) .......... 7,96-8,03 (0,3144-0,3172)
Intake valve guide inside diameter, mm (in) .......... 8,01-7,98 (0,3166-0,3152)
Intake valve oil clearance, mm (in) .......... 0,04-0,07 (0,0014-0,0028)
Exhaust valve stem outside diameter, mm (in) .......... 7,96-8,03 (0,3144-0,3174)
Exhaust valve guide inside diameter, mm (in) .......... 8,02-7,97 (0,3168-0,3150)
Exhaust valve oil clearance, mm (in) .......... 0,05-0,08 (0,0018-0,0030)
Valve guide projection, mm (in) .......... 15,00 (0,5929)
Intake valve sinking depth, mm (in) .......... 0,31-0,51 (0,0121-0,0200)
Exhaust valve sinking depth, mm (in) .......... 0,30-0,50 (0,0119-0,0198)
Thickness of intake valve head, mm (in) .......... 1,24-1,44 (0,0492-0,0571)
Thickness of exhaust valve head, mm (in) .......... 1,35-1,55 (0,0534-0,0613)
Intake valve timing (Open), degrees .......... 10-20
Intake valve timing (Close), degrees .......... 40-50
Exhaust valve timing (Open), degrees .......... 51-61
Exhaust valve timing (Close), degrees .......... 13-23
Valve spring free length, mm (in) .......... 42,00 (1,6601)
Intake and exhaust valve clearance, mm (in) .......... 0,15-0,25 (0,0059-0,0099)

Cylinder block

Cylinder bore (Std), mm (in) .......... 84,00-84,03 (3,3202-3,3213)
Cylinder bore (Wear limit), mm (in) .......... 84,20 (3,3281)
Camshaft journal outside diameter (Gear side), mm (in) .......... 44,925-44,950 (1,7757-1,7767)
Camshaft oil clearance (Gear side), mm (in) .......... 0,040-0,130 (0,0016-0,0051)
Camshaft journal outside diameter (Intermediate), mm (in) .......... 44,910-44,935 (1,7751-1,7761)
Camshaft oil clearance (Intermediate), mm (in) .......... 0,065-0,115 (0,0026-0,0045)
Camshaft journal outside diameter (Flywheel side), mm (in) .......... 44,925-44,950 (1,7757-1,7767)
Camshaft oil clearance (Flywheel side), mm (in) .......... 0,050-0,100 (0,0020-0,0040)
Crankshaft journal outside diameter, mm (in) .......... 53,952-53,962 (2,1325-2,1329)
Bearing metal thickness, mm (in) .......... 1,995-2,000 (0,0789-0,0791)
Crank journal and bushing oil clearance, mm (in) .......... 0,038-0,068 (0,0015-0,0027)
Crankshaft journal bend, mm (in) .......... 0,020 (0,0008)

Rocker arm and tappet

Rocker arm shaft outside diameter, mm (in) .......... 15,97-15,98 (0,6311-0,6318)
Rocker arm bushing inside diameter, mm (in) .......... 16,00-16,02 (0,6324-0,6332)
Rocker arm clearance, mm (in) .......... 0,02-0,05 (0,0006-0,0021)
Pushrod bending, mm (in) .......... 0,03 (0,0012)
Tappet stem outside diameter, mm (in) .......... 11,98-11,99 (0,4733-0,4739)
Tappet guide hole inside diameter, mm (in) .......... 12,00-12,02 (0,4743-0,4750)
Tappet clearance, mm (in) .......... 0,01-0,04 (0,0004-0,0017)

Pistons

Piston outside diameter (Std), mm (in) .......... 83,945-83,975 (3,3180-3,3192)
Piston outside diameter (Wear limit), mm (in) .......... 83,90 (3,3162)
Min. clearance between piston and cylinder, mm (in) .......... 0,04-0,07 (0,0016-0,0028)
Top clearance, mm (in) .......... 0,66-0,78 (0,0261-0,0308)
Piston pin outside diameter, mm (in) .......... 25,987-26,000 (1,0272-1,0277)
Piston pin hole diameter, mm (in) .......... 26,00-26,009 (1,0277-1,0280)
Piston pin clearance, mm (in) .......... 0,00-0,022 (0,0000-0,0009)
Crankpin bushing inside diameter, mm (in) .......... 51,000-51,010 (2,0158-2,0162)
Crankpin metal thickness, mm (in) .......... 1,492-1,500 (0,0590-0,0593)
Crankpin outside diameter, mm (in) .......... 47,952-47,962 (1,8953-1,8957)
Oil clearance, mm (in) .......... 0,038-0,074 (0,0015-0,0029)
Piston pin bushing inside diameter, mm (in) .......... 26,025-26,038 (1,0287-1,0292)
Piston pin outside diameter, mm (in) .......... 25,987-26,000 (1,0272-1,0277)
Oil clearance, mm (in) .......... 0,025-0,051 (0,0010-0,0020)

Piston Rings

Top ring groove width, mm (in) .......... 2,065-2,080 (0,0816-0,0822)
Top ring width, mm (in) .......... 1,970-1,990 (0,0779-0,0787)
Top ring minimum side clearance, mm (in) .......... 0,075-0,110 (0,0030-0,0043)
Top ring end clearance, mm (in) .......... 0,200-0,400 (0,0079-0,0158)
Second ring groove width, mm (in) .......... 2,035-2,050 (0,0804-0,0810)
Second ring width, mm (in) .......... 1,970-1,990 (0,0779-0,0787)
Second ring minimum side clearance, mm (in) .......... 0,045-0,080 (0,0018-0,0032)
Second ring end clearance, mm (in) .......... 0,200-0,400 (0,0079-0,0158)
Oil ring groove width, mm (in) .......... 4,015-4,030 (0,1587-0,1593)
Oil ring width, mm (in) .......... 3,970-3,990 (0,1569-0,1577)
Oil ring minimum side clearance, mm (in) .......... 0,025-0,060 (0,0010-0,0024)
Oil ring end clearance, mm (in) .......... 0,200-0,450 (0,0079-0,0178)

Yanmar 4TNE84 Tightening Torque Specs

Cylinder head bolt (M10x1,25), Nm (lb-ft) .......... 85-91 (63-67)
Connecting rod bolt (M9x1,0), Nm (lb-ft) .......... 47-54 (35-40)
Flywheel clamping bolt (M10x1,25), Nm (lb-ft) .......... 83-88 (61-65)
Metal cap clamping bolt (M12x1,5), Nm (lb-ft) .......... 96-100 (71-74)
Crankshaft V-pulley clamping bolt (M14x1,5), Nm (lb-ft) .......... 113-123 (83-90)
Fuel injection nozzle nut (M6x1,0), Nm (lb-ft) .......... 7-9 (5-7)
Timer clamping nut (M12x1,75), Nm (lb-ft) .......... 59-69 (43-51)
Governor weight support nut (M12x1,25), Nm (lb-ft) .......... 44-49 (33-36)
High pressure pipe sleeve clamping nut (M12x1,5), Nm (lb-ft) .......... 29-34 (22-25)