Thanks Wayne, I really don't think a lift pump would cause a fuel dilution problem. You should still keep an eye on the oil/fuel dilution levels. In my experience with diesels, either the injectors are leaking fuel into the pistons areas and not atomizing properly, or the rings are not doing the job correctly. As far as the antifreeze, keep and eye on that level too. Oil cooler, or possible pin hole in a cylinder liner. Do you run a good radiator additive? Injector cleaner? Hope this all works out as cheaply as possible for you...keep us up to speed. Thanks