Mark asked... Now I bring the heat exchanger to the local radiator shop as recommended in previous posts thinking it's going to cost maybe $35-$50 for the bath. When the guy quoted me $165.00, I picked up my heat exchanger and exited the shop. Is it me or did this seem to be way out of line in price? Dennis responds... First, remember it came off a boat! I have had some recent experience with this issue. When we took Sadie B out of the water last fallI took the heat exchanger to Kissimmee, FL with us and left it in a recommended radiator shop. I was flabbergasted to get a bill for $150, but I had not asked for an estimate. Also, they had not pressure tested the unit, which I had asked for. More recently, I took the same exchanger to a radiator shop in Burlington, VT to be pressure tested as I had a small coolant leak I could not find anywhere else. I told the shop I wanted a pressure test only and described the problem I had. When I returned after the Paulsbo Trawlerfest to pick it up, they had cleaned it again as well as pressure tested it. While I was rehearsing my argument about the size of the bill, the shop manager told me to "Get out of here and have a good weekend", and did not charge me anything. So, it seems there is a fairly wide allowable range of amounts for the service. By the way, with all this preventative maintenance, the antifreeze leak is now seemingly gone, but we are close to overheating, which in fact never happened before. Wish I had one of those high tech infra red thermometers! Grainger wants $175 Canadian for one. I am going to try another temperature gauge tomorrow, or whenever we get to Peterborough, Ontario. Looking forward to seeing many of you at the upcoming Grand Haven Trawlerfest event in Grand Haven. Dennis Dennis and Esther Bruckel 1984 Albin 27 Sadie B Kissimmee, FL winters, Cruising summers The smaller the boat, the bigger the adventure" Cell phone all year 321-624-2066