>Try posting the question here; found it with a Google search for cat d330t That's an out-of-date site for ACMOC that's no longer in current use. I just posted your valve question over on the current ACMOC site. Check back in a day or two to see what the guys have answered. http://www.acmoc.org/ACMOC_BB/showthread.php?t=1579 Richard