I had an MD17 HD, and I think than is not a good idea to dismantle it before trying seriously to establish a solid diagnostic of the cause this smoking. In my opinion this smoking is fuel or injection related: probably an dirty injector or in worst case, the injection pump itself out of specs. I also had this type of problem once when I took fuel at a fishing
fleet docks somewhere in North Carolina
. Keep in mind that these solid Volvo
engines, run at relatively low compression
, are a bit smoky to start with, and any miss adjustment in the injection process, creates significant smoking problems. But they are strong and won't be stopped easily: I spend the last few days of the sailing season one running it with a blown head gasket
on one head, that put one cylinder out of commission essentially, but the engine run to let me finish my season. Sending the injectors, and the injection pump to an injection shop would be a good start, and anyway it is alway good to have them checked, cleaned, and put back to specs. A single
injector leaking a bit would perfectly create such smoking problem.