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CATERPILLAR D348 Essential Diesel Engine Bolt Tightening Torques

 

CATERPILLAR D348 Main Bearing Nuts
Step 1 = 81 Nm, 60 lb.ft
Step 2 = + 120 degrees

CATERPILLAR D348 Connecting Rod Nuts
Step 1 = 120 Nm, 90 lb.ft
Step 2 = + 120 degrees

CATERPILLAR D348 Cylinder Head Bolts
Step 1 = 240 Nm, 175 lb.ft
Step 2 = 340 Nm, 250 lb.ft
Step 3 = (repeat step 2)





CATERPILLAR D340 D343 and D348 Diesel Engine Specs

 

CATERPILLAR D340 D343 and D348 Displacement, arrangement, bore and stroke

Displacement and arrangement
D340 - 9.7 liter, 595 CID
4 Cylinder in line

D343 - 14.6 liter, 893 CID
6 Cylinder in line

D348 - 29.3 liter, 1786 CID
v12 turbo aftercooled engine

Same bore and stroke for all three

Bore
5.4 in, 137 mm

Stroke
6.5 in, 165 mm

CATERPILLAR D340 D343 and D348 Power

D340 - In Scraper 619C
285 hp, 212 kW @2100 rpm

D343 - Marine T
continuous (shaft) 238 hp,
177 kW @1800 rpm
Max (flywheel)
395 hp, 294 kW @2000 rpm

D343 - Marine TA
continuous (shaft) 354 hp,
263 kW @1800 rpm
Max (flywheel)
550 hp, 409 kW @2000 rpm

D348 - Marine TA
continuous (shaft) 703 hp,
523 kW @1800 rpm
Max (flywheel)
1100 hp, 818 kW @2000 rpm

CATERPILLAR D340 D343 and D348 Dimensions, weight and compression ratio

Dimensions
D343 approx:
length - 77 in, 1955 mm (incl heat exchanger)
width - 48 in, 830 mm
height - 39 in, 978 mm

Weight
approx:
D343 weight
2230 lbs, 1014 kg

D348 weight
8500 lbs, 3850 kg

Compression ratio
15.0:1

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