60 series Detroit / head off for injector cup??

[jmlash75]

Can anyone tell me if you have to take the head off of a Detroit 60 series to replace the injector cups? I have fuel getting into my coolant system, and am told it is injector cups. Ive heard from some that the head has to come off for this. I have also heard that the head does not need t come off. Thank you in advance for some insight to this question.

[jakemcclure]

If you have EPA04 detroit or newer, i believe that is DDEC V and newer (could be 4's also) then the head will NOT have to come off.. the cups on those model engines and newer use stainless steel cups and they screw out. Anything older then they will have to come off. If you have an EGR engine, then you are safe. You will need the tool to remove and install the cups though, which is about $85 and cups are about $13/each and it's a good/smart/wise idea to replace all of them if you replace any of them. also a good idea to replace injector o-rings as well.

[truckersrstupid]

The previous post isn't 100% true. DDEc IV's can not be serviced on the engine. Only DDEC V's can be. The DDEC IV still used an N2 injector, which is the old style press-in and machine cups. N3's and E3's can be serviced without pulling the head (they do thread in from the top). You can tell pretty quick by looking at the injectors. If they have terminals w/screws holding the wires to the injector solenoid, then you're screwed. If they are plug-in style connectors, you're golden.