I have posted in this column before under the same heading. Have new information to share with the membership of this GREAT forum. FINALLY!!!!! After two years. Found that #5 cylinder had a cavitation hole in it. My 1996 3500 4wd first exhibited signs of oil in the coolant. After having oil cooler tested and replacing head gasket twice I have come to this point. Money controls alot of how long it takes you to repair things most of the time and that has definitely been the case for me. I have well over $12,000 tied up at this point. Even with all the difficulty I have had with diagnosing and getting this issue repaired I would not trade it for anything. I own the GREATEST diesel truck on the market!!!!!!! And belong to a great membership in the TDR!!!!!!!! Thanks for all the help.