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CATERPILLAR D379 D398 and D399 Essential Diesel Engine Bolt Tightening Torques

 

CAT D379, D398, D399 Main Bearing Bolts
Step 1 = 200 lb.ft, 270 Nm
Step 2 = +120 degrees

CAT D379, D398, D399 Connecting Rod Bolts
Step 1 = 40 lb.ft, 55 Nm
Step 2 = +120 degrees

CAT D379, D398, D399 Cylinder Head Bolts
step 1 - 150 lb.ft, 205 Nm
step 2 - 230 lb.ft, 312 Nm
step 3 - Repeat Step 2

CATERPILLAR D379 D398 and D399 Diesel Engine Specs

 

CAT D379, D398, D399 Displacement, arrangement, bore and stroke
Displacement and arrangement
D379
32.2 liter, 1,964 CID
V8, 4-stroke-cycle diesel

D398
48.3 liter, 2,945 CID
V12, 4-stroke-cycle diesel
turbo aftercooled engine

D399
64.4 liter, 3,927 CID
V16, 4-stroke-cycle diesel
turbo aftercooled engine

Same bore and stroke for all three

Bore
6.25 in, 159 mm

Stroke
8.0 in, 203 mm

CAT D379, D398, D399 Dimensions

D379 approx:
length - 139 in, 3534 mm (incl heat exchanger)
width - 63 in, 1600 mm
height - 90 in, 2250 mm

D398 approx:
length - 161 in, 4097 mm (incl heat exchanger)
width - 63 in, 1600 mm
height - 90 in, 2250 mm

D399 approx:
length - 186 in, 4720 mm (incl heat exchanger)
width - 63 in, 1600 mm
height - 90 in, 2250 mm

CAT D379, D398, D399 Power

D379
500-625 hp,
373-466 kW @1225 rpm

D398 - Marine TA
737-938 hp,
560-700 kW @1225 rpm

D399 - Marine TA
1000-1250 hp,
746-932 kW @1225 rpm

Weight
dry approx:
D379 - 11775 lb, 5340 kg
D398 - 14825 lb, 6723 kg
D399 - 17660 lb, 8009 kg

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