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Popular Diesel Engine Specs

Cummins QSK38 & QSK50 Essential Diesel Engine Bolt Tightenting Torques

 
Cummins QSK38 and QSK50
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°

 
Cummins QSK38 and QSK50
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

 
Cummins QSK38 and QSK50
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

 
Cummins QSK38 and QSK50
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

 
Cummins QSK38 and QSK50
Power
QSK38
Marine
1200-1400 hp, 895-1044 kW 
@ 1500-1800 rpm

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

 
Cummins QSK38 and QSK50
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

 
Cummins QSK38 and QSK50
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




Page Revision #7.6RsC 01-18