We had a couple of those NH220's running 100kw generators on the Adams class destroyer I served on in the early 90's. With only 4 head bolts per cylinder, they were prone to compression leaks, and the old Master Chief diesel inspector at Pearl Harbor was keen to this. He used to ding me on them every time, if the slightest oil bubbling by the head gasket was present. Didn't help that the counterbores could've used some attention. I got tired of that real quick, so I went and bought some copper spray-a-gasket one day, and sprayed down the head gaskets real good with it. That did the trick. I cleaned up all evidence around the edges, and never did tell him how I fixed them, but he left me alone after that. :D And yes, torquing the head bolts to 600lb-ft was a chore in a cramped space.
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Today's Featured Article - 12-Volt Conversions for 4-Cylinder Ford 2000 & 4000 Tractors - by Tommy Duvall. After two summers of having to park my old 1964 model 4000 gas 4 cyl. on a hill just in case the 6 volt system, for whatever reason, would not crank her, I decided to try the 12 volt conversion. After some research of convert or not, I decided to go ahead, the main reason being that this tractor was a working tractor, not a show tractor (yet). I did keep everything I replaced for the day I do want to restore her to showroom condition.
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