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Cummins QSK38 and QSK50 engine specifications and manuals - amp

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dimensions and weight, 
essential bolt tightening torques, 

characteristics of the engine 
e.g. its power and torque. 

Essential bolt tightening torques are
 main bearing cap bolt torque, 
 connecting rod cap bolt torque 
 and the cylinder head bolt torques.
 


 
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Cummins QSK38 and QSK50 engine specs, manuals and essential bolt torques - amp

 
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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 degrees

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Cummins QSK38 and QSK50 
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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Cummins QSK38 and QSK50 
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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Cummins QSK38 and QSK50 
engine manuals and specs
 

Cummins QSK38 and QSK50 Diesel Engine Spec Sheets

 
Cummins QSK38 
marine spec sheet 
2 page - click to download

Cummins QSK50 
drilling engine spec sheet 
2 pages - click to download

Cummins QSK50
genset engine spec sheet 
4 pages - click to download

Cummins QSK38 and QSK50 Diesel Engine workshop repair Manuals

 
Cummins K38, K50, QSK38, QSK50 
workshop manual 
854 pages - click to download

Cummins QSK38 and 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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Cummins QSK38 and QSK50 
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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Cummins QSK38 and QSK50 
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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Cummins QSK38 and QSK50 
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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Cummins QSK38 and QSK50 
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