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Perkins 4.248 Specifications

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• Perkins 4.248 Engine Specifications
• Perkins 4.248 Engine Troubleshooting

Engine Model ......... Perkins A4.248
Engine Type ......... Four-stroke 4-cylinder direct injection diesel
Cylinder Arrangement ......... In-line
Number of Cylinders ......... 4
Cylinder Bore, in (mm) ........ 3.98 (101.0)
Piston Stroke, in (mm) ........ 5.00 (127.0)
Displacement, cu.in (L) ......... 248 (4.06)
Rated Engine Power, kW (Hp) ......... 80.0 (59.0)
Rated Engine Speed, rpm ......... 2500
Maximum Torque, Nm (lb-ft) ......... 263 (194)
Torque Speed, prm ......... 1400
Aspiration Type ......... Naturally aspirated
Compression Ratio ......... 15.5:1
Firing Order ......... 1-3-4-2
Lubrication System ......... Forced with gear pump
Oil Pump Type ......... Rotor type
Oil Filter Type ......... Full Flow
Cooling System ......... Liquid-cooled
Water Pump Type ......... Centrifugal
Air Cleaner Type ......... Dry element
Starting System ......... Electric Starter
Electrical System Rating, Volts ......... 12
Charging System ......... Alternator

Fuel System ........ Direct injection
Fuel Injection Pump Make ........ CAV
Fuel Injection Pump Type ........ DPA
Injection Pump Rotation ........ Clockwise
Fuel Lift Pump Type ........ A.C. Delco
Fuel Lift Pump Drive ........ Eccentric on Camshaft
Fuel Filter Element Type ........ Paper
Fuel Filter Valve Type ........ Gravity Vent Valve

Overall Width, in (mm) ........ 27.96 (710)
Overall Height, in (mm) ........ 30.51 (775)
Overall Depth, in (mm) ........ 20.95 (532)
Net Weight, lbs (kg) ........ 750 (340)

Cylinder Bore Inside Diameter (Std), in (mm) ......... 3.975 (100.96)
Cylinder Bore Inside Diameter (Wear Limit), in (mm) ......... 3.980 (101.10)
Cylinder Liner Outside Diameter, in (mm) ......... 4.0660-4.0670 (103.27-103.30)
Cylinder Liner Inside Diameter, in (mm) ......... 3.9785-3.9795 (101.05-101.07)
Crankshaft Journal Outside Diameter, in (mm) ......... 2.9984-2.9992 (76.16-76.18)
Crankpin Outside Diameter, in (mm) ......... 2.4988-2.4996 (63.47-63.49)
Crankshaft End Play, in (mm) ......... 0.002-0.015 (0.05-0.38)
Crankshaft Bearing Outside Diameter, in (mm) ......... 3.167 (80.41)
Crankshaft Bearing Inside Diameter, in (mm) ......... 3.0010-3.0026 (76.23-76.27)
Crankshaft Bearing Running Clearance, in (mm) ......... 0.0018-0.0042 (0.05-0.11)
Connecting Rod Small End Bush Outside Diameter, in (mm) ......... 1.535-1.5365 (38.99-39.03)
Connecting Rod Small End to Piston Pin Clearance, in (mm) ......... 0.00075-0.0017 (0.019-0.043)
Connecting Rod Big End Inside Diameter, in (mm) ......... 2.6460-2.6465 (67.21-67.22)
Connecting Rod Small End Inside Diameter, in (mm) ......... 1.53125-1.53225 (38.90-38.92)
Connecting Rod Bearing Running Clearance, in (mm) ......... 0.0012-0.0031 (0.03-0.08)
Connecting Rod Bearing Outside Diameter, in (mm) ......... 2.6465 (67.22)
Connecting Rod Bearing Inside Diameter, in (mm) ......... 2.5008-2.5019 (63.52-63.55)
Cylinder Block Tappet Bore Diameter, in (mm) ......... 0.750-0.7513 (19.05-19.08)
Tappet Running Clearance in Bore, in (mm) ......... 0.0015-0.0038 (0.04-0.10)

Cylinder Head Length, in (mm) ......... 19.875 (504.82)
Cylinder Head Flatness, in (mm) ......... 0.002-0.003 (0.05-0.08)
Intake Valve Head Diameter, in (mm) ......... 1.736-1.746 (44.09-44.36)
Exhaust Valve Head Diameter, in (mm) ......... 1.435-1.445 (36.45-36.70)
Intake Valve Overall Length, in (mm) ......... 4.831-4.847 (122.71-123.11)
Exhaust Valve Overall Length, in (mm) ......... 4.847-4.863 (123.11-123.52)
Intake Valve Face Angle ......... 45 deg
Exhaust Valve Face Angle ......... 45 deg
Intake Valve Stem Outside Diameter, in (mm) ......... 0.3725-0.3735 (9.46-9.48)
Exhaust Valve Stem Outside Diameter, in (mm) ......... 0.372-0.3728 (9.45-9.47)
Intake Valve Guide Inside Diameter, in (mm) ......... 0.375-0.376 (9.53-9.55)
Exhaust Valve Guide Inside Diameter, in (mm) ......... 0.375-0.376 (9.53-9.55)
Intake Valve Stem to Guide Clearance, in (mm) ......... 0.0015-0.0035 (0.04-0.09)
Exhaust Valve Stem to Guide Clearance, in (mm) ......... 0.00225-0.004 (0.06-0.10)
Intake Valve Springs Free Length, in (mm) ......... 1.5625 (39.7)
Exhaust Valve Springs Free Length, in (mm) ......... 1.780 (45.22)
Cam Lift, in (mm) ......... 0.300-0.303 (7.62-7.70)
Camshaft End Play, in (mm) ......... 0.004-0.016 (0.10-0.41)
Camshaft Journal Outside Diameter (No 1), in (mm) ........ 1.9965-1.9975 (50.71-50.74)
Camshaft Journal Running Clearance (No 1), in (mm) ........ 0.0025-0.0045 (0.06-0.11)
Camshaft Journal Outside Diameter (No 2), in (mm) ........ 1.9865-1.9875 (50.46-50.48)
Camshaft Journal Running Clearance (No 2), in (mm) ........ 0.0025-0.0053 (0.06-0.14)
Camshaft Journal Outside Diameter (No 3), in (mm) ........ 1.9665-1.9675 (49.95-49.98)
Camshaft Journal Running Clearance (No 3), in (mm) ........ 0.0025-0.0053 (0.06-0.14)

Piston Pin Bore Inside Diameter, in (mm) ......... 1.37485-1.37505 (34.92-34.93)
Piston Pin Outside Diameter, in (mm) ......... 1.37440-1.37480 (34.91-34.92)
Top Ring Groove Width, in (mm) ......... 0.1015-0.1024 (2.58-2.60)
Second Ring Groove Width, in (mm) ......... 0.1015-0.1024 (2.58-2.60)
Oil Ring Groove Width, in (mm) ......... 0.1984-0.1992 (5.04-5.06)
Top Ring Groove Clearance, in (mm) ......... 0.0017-0.0027 (0.04-0.07)
Second Ring Groove Clearance, in (mm) ......... 0.0017-0.0027 (0.04-0.07)
Oil Ring Groove Clearance, in (mm) ......... 0.002-0.0038 (0.05-0.10)
Top Ring End Gap, in (mm) ......... 0.016-0.034 (0.41-0.86)
Second Ring End Gap, in (mm) ......... 0.016-0.034 (0.41-0.86)
Oil Ring End Gap, in (mm) ......... 0.016-0.034 (0.41-0.86)

Engine oil type ........ SAE 10W-30, 15W-40
Engine oil capacity, L (qts) ........ 8.0 (8.4)
Coolant capacity, L (qts) ........ 15.6 (16.5)
Oil filter change interval ........ Every 250 hours
Oil change interval ........ Every 250 hours
Fuel filter change interval ........ Every 500 hours

Cylinder Head Nuts/Setscrews (1/2 in), Nm (lb-ft) ........ 136 (100)
Cylinder Head Setscrews with Integral Head, Nm (lb-ft) ........ 120 (88)
Connecting Rod Nuts, Nm (lb-ft) ........ 122 (90)
Main Bearing Setscrews, Nm (lb-ft) ........ 244 (180)
Idler Gear Hub Setscrews, Nm (lb-ft) ........ 41 (30)
Fuel Injection Pump Gear Retaining Setscrews, Nm (lb-ft) ........ 27 (20)
D.P.S. Fuel Injection Pump Gear Retaining Nut, Nm (lb-ft) ........ 81 (60)
Flywheel Setscrews, Nm (lb-ft) ........ 108 (80)
Flywheel Place Bolts, Nm (lb-ft) ........ 122 (90)
Flywheel Housing Setscrews (Standard), Nm (lb-ft) ........ 49 (36)
Camshaft Gear Retaining Setscrews, Nm (lb-ft) ........ 68 (50)
Crankshaft Pulley Retaining Setscrew, Nm (lb-ft) ........ 406 (300)
Oil Filter Setscrews/Nuts, Nm (lb-ft) ........ 41 (30)
Atomiser Securing Nuts, Nm (lb-ft) ........ 18 (14)
Atomiser Clamp Nuts, Nm (lb-ft) ........ 12 (9)
Rockershaft Support Brackets (Cast Iron), Nm (lb-ft) ........ 74 (54)
High Pressure Fuel Pipe Nuts, Nm (lb-ft) ........ 20 (15)
Dynamo Pulley Retaining Nut, Nm (lb-ft) ........ 27 (20)
Alternator Pulley Retaining Nut, Nm (lb-ft) ........ 41 (30)
Balancer Retaining Setscrews, Nm (lb-ft) ........ 50 (40)

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