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In Reply to: oil pressure loss on d342 posted by Tom Ellefson on Friday, January 04, 2008:
Cummins makes a dye to put in engine oil or fuel. You could put some in your fuel, use a black light to check for the sorce of the leak. Glows bright yellow under blacklight and easy to see. Not too familiar with the engine configuration you've got but check around the seals where the lines go into the head- if applicable. Also check around the injectors, maybe a seal went south on you...