John,
I just recently pulled my heat exchanger to replace the zinc, hoses and clamps. When I removed the outside plate I found fins from an old impeller that were there who knows how long and who knows how old. On the exchanger was a stamp with the manufacturer's name..."Sen-Dure", Bay Shore, NY. After a little internet searching I found Sen-Dure was still in business and still making exchangers for many different applications including and above all marine engines. Long story short, a gentleman by the name of "Dave" was able to tell me the exact date that my heat exchanger was made. They had mine (and probably yours too) in stock for almost half the price that Marine Diesel/Torresen was asking. Given the condition of my 25 yr. old exchanger and the cost of a new one, replacing it was a no brainer. I would strongly recommend Sen-Dure.com if you're considering a replacement, which it sounds like you are. They were extremely helpful, knowledgeable and courteous...and oh yeah, the price was right too. Good luck. Ray Maldonado C27 TR 6036 Setauket, NY -----Original Message----- From: The Emmerichs <[email protected]> To: [email protected] Sent: Fri, May 21, 2010 7:07 pm Subject: [IC27A] Heat Exchanger At the end of last season, I lost 4 or 5 vanes from my sea waterpump impellor. I discovered this when I tried to run antifreeze thru the pump,heat exchanger and associated hoses and nothing came out the exhaust. Iopened the water pump and found vanes were missing. One was blocking thedischarge and when I removed it there was a more or less normal flow out thestern. I have received different advice. A diesel engine mechanictold me you have to find the vanes. Others have said if there is goodflow out the exhaust, don’t worry about it. I’ve decided thatif I was going to 18 mile island or Madison, IN, I would be worrying aboutit. I don’t want to be 12 or 35 miles from home port and have anengine that is overheating. I pulled the heat exchanger this afternoon, took about 2hours. The biggest difficulty was getting the hoses loose which have beenon the boat for 25 years. I have not opened it yet so I don’t know what Iwill find inside. Anyway, I’m committed, the 25 year old hosesprobably needed to be changed anyway. I think I remember some traffic on the list several or moreyears ago that the heat exchanger size was increased in later boats. Mineis a ’85, the heat exchanger is 2 1/16 inches in diameter. I havechecked CD and they do not have heat exchangers on their web site. Any thoughts on this? Does anyone know of a larger heatexchanger? My engine has been running at 175 degrees which is within therange in the engine manual although near the upper end. John Emmerich C27 TR 5874 Louisville, KY
