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Cummins N855 Big Cam specifications and bolt torques


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Basic specs are open to everyone and include images, displacement, dimensions and weight, essential bolt tightening torques, the characteristics of the engine like its power and torque.
Essential bolt tightening torques are the main bearing cap bolt torque, the connecting rod cap bolt torque and the cylinder head bolt torques.


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Cummins N855 Big Cam bolt torques, specifications and links to manuals

At Barrington Diesel club, we do diesel engine manuals, specs, bolt torques
at Barrington Diesel Club

Cummins N855 Big Cam I thru Big Cam III step by step essential bolt tightening torques

Main Bearing Bolts
Step 1 = 85 lb.ft, 115 Nm
Step 2 = 170 lb.ft, 230 Nm
Step 3 = 255 lb.ft, 345 Nm
Step 4 = Loosen
Step 5 = 85 lb.ft, 115 Nm
Step 6 = 170 lb.ft, 230 Nm
Step 7 = 255 lb.ft, 345 Nm

Connecting Rod Bolts
Step 1 = 100 Nm, 75 lb.ft
Step 2 = 200 Nm, 150 lb.ft
Step 3 = Loosen
Step 4 = 100 Nm, 75 lb.ft
Step 5 = 200 Nm, 150 lb.ft

Cylinder head Bolts
Step 1 = 30 Nm, 25 lb.ft
Step 2 = 135 Nm, 100 lb.ft
Step 3 = 340 Nm, 305 lb.ft


Cummins N855 Big Cam IV step by step essential bolt tightening torques

Main Bearing Bolts
1" bolts:
Step 1 = 110 lb.ft, 150 Nm
Step 2 = 210 lb.ft, 285 Nm
Step 3 = 305 lb.ft, 415 Nm
Step 4 = Loosen
Step 5 = 110 lb.ft, 150 Nm
Step 6 = 210 lb.ft, 285 Nm
Step 7 = 305 lb.ft, 415 Nm

Main Bearing Bolts
3/4" bolts:
Step 1 = 90 lb.ft, 120 Nm
Step 2 = 170 lb.ft, 230 Nm
Step 3 = 255 lb.ft, 345 Nm
Step 4 = Loosen
Step 5 = 90 lb.ft, 120 Nm
Step 6 = 170 lb.ft, 230 Nm
Step 7 = 255 lb.ft, 345 Nm

Connecting Rod Bolts
Step 1 = 100 Nm, 75 lb.ft
Step 2 = 230 Nm, 170 lb.ft

Cylinder head Bolts
Step 1 = 35 Nm, 25 lb.ft
Step 2 = 135 Nm, 100 lb.ft
Step 3 = 385 Nm, 285 lb.ft

N855 Common Specs from BigCam I thru BigCam IV

Cummins N855 Big Cam
Displacement
14.0 liter,  855 CID

Arrangement
6 cylinder in-line engine
with
naturally aspirated
turbocharged 
and turbo aftercooled
variants

Cummins N855 Big Cam
Bore:
139.7 mm,  5.5 in

Stroke:
152.4 mm,  6.00 in

Power
250-400 hp
186 -298 kW @ 2100 rpm

some later standby gensets 
rated at 600 hp, 450 kW

Torque
(400 hp engine)
1150 lb.ft, 1559 Nm @ 1500 rpm

Dimensions:
approx:
length 1496 mm, 59 in
width 863 mm, 34 in
height 1293 mm, 51 in

Weight:
approx:
2800 lb, 1273 kg

BigCam Cummins N855 Manuals, Books, History, Valve and injector set procedures



Barrington Diesel Club
Phone: +27 72 754 4660
email: steve@barringtondieselclub.co.za
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