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Detroit Diesel 149 Series model number breakdown

jimg4652

Contributing Member
"I have seen a few threads sta

"I have seen a few threads started asking what that persons particular model number means. I dug through some service manuals at work and found model number break-downs for 53, in-line 71, V-92, and 149 Series engines. This break down is for the 149 Series engine only.

All rotations are found with you standing in front of the engine, looking at the crank pulley. If the pulley rotates counter-clockwise, it's a left-hand rotation. If it turns clockwise, it's right-hand.

Bank determination (Left bank, Right Bank)is with you standing at the back of the engine looking at the flywheel.


First digit in the model number determines what Series your engine is. 1000-0000

5 = 53 Series
1 = In-line 71 Series
8 = V-92 Series
9 = 149 Series




0230-0000: 2nd and 3rd digits determine how many cylinders the engine has.

08 = 8 cylinders
12 = 12 cylinders
16 = 16 cylinders
20 = 20 cylinders


0004-0000: 4th digits determines the "application designation"

2 = Marine
3 = Industrial



0000-5000: 5th digit determines the engine rotation.

3 = Left Hand rotation
7 = Right Hand rotation


0000-0600: 6th digit determines the "Design Variation"

0 = Non-turbo
3 = Turbo or Turbo-Intercooled
4 = Turbo Intercooled bypass
C = DDEC equipped



0000-0078: 7th and 8th digits determine the specific model number.

Remember, the model number on your block determines the way your engine came from the FACTORY. Anything could have changed by others who have rebuilt your engine."
 
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