Detroit Diesel 4-71 Manuals, Bolt Torques, Specs

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Detroit Diesel 4-71
Main Bearing Bolts
Step 1 = 100 lb.ft, 135 Nm
Step 2 = 184 lb.ft, 250 Nm

Detroit Diesel 4-71
Connecting Rod Bolts
67, lb.ft, 90 Nm

Detroit Diesel 4-71
Cylinder Head Bolts
Step 1 = 100 lb.ft, 135 Nm
Step 2 = 184 lb.ft, 250 Nm

Detroit Diesel
4-71 Arrangement,
Displacement, Bore, Stroke
and Compression Ratio

Arrangement
4-71N
4 Cyl In-Line, Naturally Aspirated

4-71T
4 Cyl In-Line, turbocharged

Displacement
4-71 - 4.7 liter, 284 CID

Bore
4.25 in, 108 mm

Stroke
5.0 in, 127 mm

Compression Ratio
4-71N 18.7:1
4-71T 17.0:1

Detroit Diesel 4-71
Power and Torque

Power
4-71N
155 hp, 116 kW @ 2100 rpm

4-71T
211 hp, 157 kW @ 2300 rpm

Torque
4-71N
407 lb.ft, 552 Nm @ 1600 rpm

4-71T
533 lb.ft, 723 Nm @ 1400 rpm

Detroit Diesel 4-71
Dimensions and Weight

Dimensions approx
4-71N
Length 1067 mm, 42 in
Width 737 mm, 29 in
Height 1067 mm, 42 in

4-71T
Length 1128 mm, 44 in
Width 790 mm, 31 in
Height 1120 mm, 44 in

Weight approx
4-71N 807 kg, 1780 lb
4-71N 830 kg, 1830 lb