 So here is the story. About a year ago, I noticed the #1 injector on our 1755 was hissing (losing compression). While running, I could physically see the injector bouncing when the engine was idling. When I rebuilt the engine about 10 years ago, I noticed one of the injectors had a slightly different tip. The basic dimensions were the same so I decided to keep running it on the #1 cylinder. I decided to replace the #1 injector last spring to see if that would solve the "bouncing injector problem. I replaced the whole set since they were still the originals. The carbon damn on #1 was completly gone. When I ran the micrometer over the OD, I couldn't see any dimensional difference over the other injectors so I assumed the bore was OK and that no major wear occured due to the bouncing. Before I installed the new set, I ran an appropriatly sized reamer through the bores to make sure the carbon was out. The local diesel shop recommended I intall the injector lowering kit for better starting so I did. With the new set in, the engine ran great for about 1/2 hour. After that, the idle wasn't quite as smooth, but nothing really worth doing much about. Over the summer (about 75 hrs. of running), I noticed some black seepage around the #1 exhaust port. Since I have been fixing little things on the tractor this spring, I decided to pull the injector to see if I could find a problem. When I went to pull the injector, it was stuck...and I mean stuck. I ended up wrecking my injector puller and final ended up welding an adapter onto the injector to pull it with my 5 lb slide hammer. From what I can tell, the carbon dam eroded and carbon packed inbetween the injector and the bore. The other injectors are free & "normal", therefore I know something is up with #1. Any thoughts? Does the injector bore need to be sleeved? Bad injector settings? I appreciate your help.
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