I couldn't find a thread on what is a recommended service: cleaning and maybe rebuilding fuel injectors on Universal diesels.
Any known pitfalls?
The books say clean the block carefully so junk doesn't fall into the cylinders. Remove the steel fuel tubes without bending them much, and probably as a unit. Remove the blow-by lines connecting the injectors one to another.
I concluded (by reading) that testing and hand-cleaning are probably not sufficient, and that the simple solution is to take the injectors to a diesel shop for a professional assessment, testing and cleaning. They're simple in theory but the tolerances and spray pattern are crucial.
At the moment I have the fuel feed lines off, which was easy enough although required one new (short) 11/16th/17 mm spanner since E38 access is not great. Yesterday I squirted some PB Blaster on the injector threads to prepare for today's attempt at removal. wrenches.
I ought to have done this before the long cruise. When I asked Martin Ball, who did my initial engine survey, what maintenance the M40 needed beyond the usual, he said "Well, you could have the injectors checked out."
I doubt most of our engines have had it done, even after 30 years.
Any known pitfalls?
The books say clean the block carefully so junk doesn't fall into the cylinders. Remove the steel fuel tubes without bending them much, and probably as a unit. Remove the blow-by lines connecting the injectors one to another.
I concluded (by reading) that testing and hand-cleaning are probably not sufficient, and that the simple solution is to take the injectors to a diesel shop for a professional assessment, testing and cleaning. They're simple in theory but the tolerances and spray pattern are crucial.
At the moment I have the fuel feed lines off, which was easy enough although required one new (short) 11/16th/17 mm spanner since E38 access is not great. Yesterday I squirted some PB Blaster on the injector threads to prepare for today's attempt at removal. wrenches.
I ought to have done this before the long cruise. When I asked Martin Ball, who did my initial engine survey, what maintenance the M40 needed beyond the usual, he said "Well, you could have the injectors checked out."
I doubt most of our engines have had it done, even after 30 years.
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