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Cummins QSK38 and QSK50 specifications and manuals




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Your Diesel Engine Specs

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.


Some Popular Engine Specs


Cummins QSK38 and QSK50 bolt torques, specifications and manuals

Cummins QSK38 & QSK50 Essential Diesel Engine Bolt Tightenting Torques

Main Bearing Bolts
main bearing capscrews
step 1 = 265 Nm, 195 lb.ft
step 2 = 605 Nm, 445 lb.ft
step 3 = loosen
step 4 = 265 Nm, 195 lb.ft
step 5 = 605 Nm, 445 lb.ft

main bearing mounting capscrews
step 1 = 176 Nm, 130 lb.ft
step 2 = 339 Nm, 250 lb.ft
step 3 = loosen
step 4 = 339 Nm, 250 lb.ft
step 5 = + 90°

Connecting Rod Bolts
(Manual Vol 3)
step 1 = 108 Nm, 80 lb.ft
step 2 = 217 Nm, 160 lb.ft
step 3 = 325 Nm, 240 lb.ft
step 4 = loosen
step 5 = 108 Nm, 80 lb.ft
step 6 = 217 Nm, 160 lb.ft
step 7 = 325 Nm, 240 lb.ft
step 8 = 365 Nm, 270 lb.ft

Cylinder head Bolts
step 1 = 270 Nm, 200 lb.ft
step 2 = 407 Nm, 300 lb.ft
step 3 = 555 Nm, 410 lb.ft


Cummins QSK38 & QSK50 Diesel Engine Specs

Displacement
QSK38 - 38 liter, 2300 CID

QSK50 - 50 liter, 3067 CID

Arrangement
QSK38 - 
V12 turbocharged after-cooled

QSK50 - 
V16 turbocharged after-cooled

Compression Ratio:
Range from 13.5:1 to 15.5:1
Depending on CPL

Power
QSK38
Marine
1200-1400 hp, 895-1044 kW 
@ 1500-1800 rpm

QSK50
Drilling Genset
1400-1600 hp, 1044-1715 kW 
@ 1200-1800 rpm

Bore:
6 1/4", 158.75 mm

Stroke:
6 1/4", 158.75 mm

Weight:
approx:
QSK38
4 640 kg, 10 230 lb

QSK50
5 700 kg, 12 566 lb

Dimensions:
approx:
QSK38
Marine + accessories approx:
length 2688 mm, 106 in
width 1642 mm, 65 in
height 2108 mm, 83

QSK50
length 2609 mm, 1063 in
width 1492 mm, 59 in
height 1910 mm, 75

Cummins QSK38 & QSK50 Diesel Engine Spec Sheets

QSK38 marine spec sheet, p1
Cummins QSK38 
marine spec sheet 
2 page - click to download
qsk50 drilling engine spec sheet p1
Cummins QSK50 
drilling engine spec sheet 
2 pages - click to download
QSK50 genset engine spec sheet p1
Cummins QSK50
genset engine spec sheet 
4 pages - click to download

Cummins QSK38 & QSK50 Diesel Engine workshop repair Manuals

qsk50-and-qsk38 workshop manual p1
Cummins K38, K50, QSK38, QSK50 
workshop manual 
854 pages - click to download




Barrington Diesel Club
Phone: +27 72 754 4660
email: steve@barringtondieselclub.co.za
© copyright Steve Barrington 2016

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