Key Diesel Engine Specs for
 CATERPILLAR 3304 and 3306 
at Barrington Diesel Club




 

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    Specs for diesel engines and technical data provided courtesy of Barrington Diesel Club	
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 CATERPILLAR 
Model
 Displacement   Arrangement   Bore   Stroke  Power Torque
3304 7.0 liter
427 CID
4 Cyl In-Line 4.75"
120.65 mm 
6.0"
152.4 mm
71 kW, 95 hp @ 2800 rpm   277 lb.ft, 376 Nm @ 1800 rpm
Image CAT 3304  Key Torques  Mains Con Rods Cyl Head
Step 1 = 40 Nm, 30 lb.ft
Step 2 = +90°
Step 1 = 40 Nm, 30 lb.ft
Step 2 = +90°
Step 1 = 155 Nm, 116 lb.ft
Step 2 = 250 Nm, 186 lb.ft
Weight  Dimensions  Compression Ratio Notes & Links Valve adjustment
1630 lb
739 kg
length = 46 in, 1158 mm
width = 29 in, 744 mm
height = 50 in, 1270 mm
15.0:1
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Intake = 0.015 in, 0.38 mm
Exhaust = 0.025 in, 0.64 mm
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 CATERPILLAR 
Model
 Displacement   Arrangement   Bore   Stroke  Power Torque
3306 10.5 liter
638 CID
6 Cyl In-Line 4.75"
120.65 mm 
6.0"
152.4 mm
3306NA = 145 hp, 108 kW @ 1800 rpm
3306T = 150 hp, 111 kW @ 1800 rpm
3306TA = 211 hp, 157 kW @ 1800 rpm
 
3306NA = 423 lb.ft, 574 Nm @ 1800 rpm
3306T = 458 lb.ft, 621 Nm @ 1800 rpm
3306TA = 616 lb.ft, 835 Nm @ 1800 rpm
Image CAT 3306  Key Torques  Mains Con Rods Cyl Head
Step 1 = 40 Nm, 30 lb.ft
Step 2 = +90°
Step 1 = 40 Nm, 30 lb.ft
Step 2 = +90°
Step 1 = 155 Nm, 116 lb.ft
Step 2 = 250 Nm, 186 lb.ft
Weight  Dimensions  Compression Ratio Notes & Links Valve adjustment
2090 lb
948 kg
3306T
length = 59 in, 1208 mm
width = 48 in, 830 mm
height = 39 in, 978 mm
15.0:1
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Intake = 0.015 in, 0.38 mm
Exhaust = 0.025 in, 0.64 mm
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