could be heat exchanger has internal leak it happened to me??? -----Original Message----- From: [email protected] [mailto:[email protected]]on Behalf Of John Miller Sent: Wednesday, February 10, 2010 12:29 AM To: [email protected] Subject: Re: [UnifliteWorld] Re: change from salt water to antifreeze cooling for manifolds
I said reservoir, meant expansion tank. Engines run about 180 deg,no problem, but I am adding fluid often. no leaks, not on long runs,but when turning motors on and off I need to keep an eye on the fluid level. Same on both motors. On Tue, Feb 9, 2010 at 11:03 PM, John Miller < [email protected]> wrote: This sounds like the system on my 318's. I have a diagram and instructions calling it "The San Juan Cooling System" My heat exchangers are mounted along each engine on the outside. I have the original aluminum reservoir, none of the replacement ones fit under the hatch on my '72 SaltyDog. On Tue, Feb 9, 2010 at 7:17 PM, gene < [email protected]> wrote: John: Am I correct that your engine has a "half" system, that is antifreeze cooled block and salt (raw) water cooled exhaust manifolds? If so, the small aluminum reservoir may not be sufficient to cool the antifreeze after being heated by both the block and the manifolds. In a full system, one hose from the heat exchanger usually runs to a T fitting which in turn runs one hose to the aft end of each manifold. Hoses also run from the forward or top forward end of the manifolds to a T and then to the thermostat housing. That puts the two manifolds in the antifreeze circulating system before the fluid enters the block. The heat exchanger needs to have fittings for the cooling salt water in and out and then two more fittings for the heated antifreeze in and out (total of four). You may want to check with some heat exchanger manufacturers like Sen Dure in Florida for the capacity and size of the heat exchanger designed for your engine. By the way, if the manifolds have been salt water cooled for any period of time, you may find that the passages are already clogged. Gene -- You received this message because you are subscribed to the Google Groups "UnifliteWorld" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected] <mailto:unifliteworld%[email protected]> . For more options, visit this group at http://groups.google.com/group/unifliteworld?hl=en. -- You received this message because you are subscribed to the Google Groups "UnifliteWorld" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/unifliteworld?hl=en. -- You received this message because you are subscribed to the Google Groups "UnifliteWorld" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/unifliteworld?hl=en.
