Soldering Volvo Penta exhaust outlet

Hello All, If any of you are familiar with soldering cooper and cast iron together and/or with the cooling arrangement on a Volvo Penta MD7A (1979 Cal 31); I could dearly use some advice. I have been trying for quite some time to get the copper cooling pipe installed without leaks. I even broke down and ordered a new one for $100 for a copper pipe about 15" long with 3 fittings on it; one from the raw water pump, a "T" fitting into the bottom of the exhaust manifold and then one into the bottom of the thermostat housing. I would like to redesign this rather lame arrangement by soldering copper fittings onto the exhaust manifold and thermostat housing and then use simple heat rated tubing on barbs w/ hose clamps; anything that would make a better, easier fit than the existing POS. In fact, I think this is how it was done on the MD6A and B engines. Any advice would be greatly appreciated, John Stacklyn Cal 31 #33 "Sol Survivor" Shell Point, FL

Yes you can solder cast iron. When you google it there are some YouTube videos that show how. When you do it please document it because I will follow your lead. Bob Connell "Jollygood!", Cal 31, #59 Olympia, WA From: John <st… [at] embarqmail.com> To: Ca… [at] yahoogroups.com Sent: Wed, April 7, 2010 4:00:12 AM Subject: [Cal_Boats] Soldering Volvo Penta exhaust outlet Hello All, If any of you are familiar with soldering cooper and cast iron together and/or with the cooling arrangement on a Volvo Penta MD7A (1979 Cal 31); I could dearly use some advice. I have been trying for quite some time to get the copper cooling pipe installed without leaks. I even broke down and ordered a new one for $100 for a copper pipe about 15" long with 3 fittings on it; one from the raw water pump, a "T" fitting into the bottom of the exhaust manifold and then one into the bottom of the thermostat housing. I would like to redesign this rather lame arrangement by soldering copper fittings onto the exhaust manifold and thermostat housing and then use simple heat rated tubing on barbs w/ hose clamps; anything that would make a better, easier fit than the existing POS. In fact, I think this is how it was done on the MD6A and B engines. Any advice would be greatly appreciated, John Stacklyn Cal 31 #33 "Sol Survivor" Shell Point, FL