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Popular Diesel Engine Specs


Cummins QSK38 and QSK50 Essential Diesel Engine Bolt Tightening 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°

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engine manuals and specs
 
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







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engine manuals and specs
 
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











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QSK38 and QSK50 
engine manuals and specs
 

Cummins QSK38 & QSK50 Diesel Engine Specs

 
Cummins QSK38 and QSK50
Displacement, arrangement 
and compression ratio

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

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engine manuals and specs
 
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








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engine manuals and specs
 

Cummins QSK38 and QSK50
Bore, stroke and weight

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

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engine manuals and specs
 
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



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engine manuals and specs
 

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 #7.7RsC 08-18