12.7l

  1. M

    Fuel Economy 12.7 fuel efficiency add ons?

    Just bought a 97 fld 120with a 12.7 Detroit . Exhaust manifold is cracked so needs replacing. I see bully dogs ceramic coated are 1400.00. How are those for depentability how about Pittsburgh powers? Have any one else on here taken a older 12.7 and done or added things for better fuel milage...
  2. Mammoth Transport

    Driving for economy 12.7

    i have a 12.7 Detroit with a EF 13 speed. 24.5 low pro. At 62mph tachometer reads 1650 rpm. How does one drive this truck for economy at 80gross.
  3. Z

    Detroit 12.7 Hard Start

    Hello, Few weeks ago my 2003 Freightliner Century with a Detroit 12.7 has developed a hard starting problem. It is become so hard to start that I have to use the start up fluid or else I will drain the batteries. Apart from that it has lost power and is consuming quiet a lot of fuel. I got...
  4. Z

    Detroit 12.7 Hard Start, High Fuel Consumption

    ello, Few weeks ago my 2003 Freightliner Century with a Detroit 12.7 has developed a hard starting problem. It is become so hard to start that I have to use the start up fluid or else I will drain the batteries. Apart from that it has lost power and is consuming quiet a lot of fuel. I got...
  5. T

    12.7 porting

    anyone try porting the heads on a Detroit 12.7 and did it do any good??
  6. T

    12.7 work

    Have any of you KW guys done an inframe yourself on a 12.7 detroit..??? would like to hear about how it went and pics..
  7. T

    bull gear on a 12.7

    Does the bull gear run the cams on the 12.7 Detroit???
  8. T

    rebuilding the 12.7

    anyone have a chronicle on a guy who rebuilt his 12.7 DD for the first time..?? pics,story etc..
  9. T

    finding a used 12.7 Detroit

    Where would you go to find a used DD 12.7 stand alone so it could be rebuilt.No truck just the engine..?
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