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Cummins ISB and QSB engine specifications and manuals - amp

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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 ISB and QSB engine specs, manuals and essential bolt torques - amp

 
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Cummins ISB and QSB Essential Diesel Engine Bolt Tightening Torques

 
Cummins ISB QSB
Main Bearing capscrews

Used bolts
Step 1 = 50 Nm, 37 lb.ft
Step 2 = 80 Nm, 60 lb.ft
Step 3 = + 90 degrees

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Cummins ISB and QSB 
engine manuals and specs
 
Cummins ISB QSB
Main Bearing capscrews

New bolts
Step 1 = 120 Nm, 90 lb.ft
Step 2 = loosen all
Step 3 = 60 Nm, 45 lb.ft
Step 4 = 85 Nm, 63 lb.ft
Step 5 = + 120 degrees

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Cummins ISB and QSB 
engine manuals and specs
 
Cummins ISB QSB
Connecting Rod Bolts

step 1 = 30 Nm, 22 lb.ft
step 2 = 60 Nm, 44 lb.ft
step 3 = + 60 degrees

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Cummins ISB and QSB 
engine manuals and specs 
 
Cummins ISB QSB
Cylinder Head capscrews

step 1 = 90 Nm, 66 lb.ft
step 2 = repeat above
step 3 = + 90 degrees

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Cummins ISB and QSB 
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Cummins ISB and QSB Diesel Engine Spec Sheets

 
cummins qsm performance graphs - 3 pages, click to download

Cummins qsb specs overview

Cummins ISB and QSB Diesel Engine workshop repair Manuals

 
Cummins ISB ISL
training booklet, 107 pages - click to download

ISB QSB Service manual, 690 pages - click to download

cummins qsb 6.7 parts book, 97 pages - click to download

Cummins qsb4.5 qsb6.7
operation and maintenance manual, 340 pages - click to download

Cummins ISB CM2100 CM2150 Service manual, 1379 pages - click to download manual

Cummins ISB and QSB Diesel Engine Specs

 
Cummins ISB and QSB 
Displacement, bore and stroke

4-cylinder engines
Displacement 
3.9 liter, 238 CID 

Bore 
102 mm, 4.02 in

Stroke 
120 mm, 4.72 in

Displacement 
4.5 liter, 275 CID

Bore 
107 mm, 4.21 in

Stroke 
124 mm, 4.88 in

6-cylinder engines
Displacement 
5.9 liter, 360 CID

Bore 
102 mm, 4.02 in

Stroke 
120 mm, 4.72 in

Displacement 
6.7 liter, 409 CID

Bore 
107 mm, 4.21 in

Stroke 
124 mm, 4.88 in

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Cummins ISB and QSB 
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Cummins ISB and QSB
Power Ratings

4 CYL
Power from:
 140 to 185 hp
 104 to 138 kW @ 2500 rpm

Torque from:
 550 to 750 Nm 
 406 to 553 lb.ft
 @ 1200 to 1600 rpm

6 CYL
Power from:
 205 to 300 hp
 153 to 224 kW @ 2500 rpm

Torque from:
 750 to 1150 Nm 
 553 to 848 lb.ft
 @ 1200 to 1700 rpm

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Cummins ISB and QSB 
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Cummins ISB and QSB
Dimensions and weight

5.9 liter Dimensions
length 1036 mm, 41 in
width 836 mm, 33 in
height 880 mm, 35 in
approx

5.9 liter Weight
612 kg, 1350 lb
approx

6.7 liter Dimensions
length 1097 mm, 43 in
width 910 mm, 36 in
height 857 mm, 34 in
approx

6.7 liter Weight
659 kg, 1450 lb
approx

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Cummins ISB and QSB 
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