Simple screen would probably work just fine, need a large surface area. Might also install pressure gauges before and after the heat exchanger to measure the pressure drop, if the difference in pressure is more than a few pounds, you may have a problem. -- Max Dillon Charleston SC '95 E300 '87 300TD
Randy Bennell <rbenn...@bennell.ca> wrote: > >I would like to think you are correct but I don't want to over heat the > >engine. I am told that is a no-no with these engines. >What I have is an old 165 HP inline 6 cylinder GM engine - 250 cid. >Basic GM block used by Mercruiser for a number of years in the 60's and > >70's. > >I bought a heat exchanger that I am told was originally used on that >engine on ebay last winter. It had been retrofitted for use on a >smaller inboard engine in a sailboat for a number of years. >The sailboat underwent a bit of a rebuild and at the end of the day >they >installed a new engine with its own cooler setup. >Before that happened, this heat exchanger was cleaned up and was ready >for re-installation. >I have not taken it apart but I have photos of the inside of it >somewhere, from when it was cleaned out. > >It does look as though it has reasonably large passages through it. > >So, the filter idea may only be a temporary thing while I see how much >gunk is showing up. I wonder if a screen of some sort might be >sufficient just to see what appears at the outset. >However, as I said, I don't want to ruin the thing. I am told that if >one overheats this engine the head will warp and it will then need >extensive work. > >My whole reason for wanting to do this change to closed cooling is to >make a cabin heater more viable. One can run a heater core off of the >engine like in a car and I am told it is much more effective with a >closed system vs a raw water system. > >For those spring and fall days, it would be nice to have a heater under > >the dash that would blow a bit of warmth back at me. > >Randy > >On 12/10/2012 10:56 AM, Dan Penoff wrote: >> Randy, >> >> I am only familiar with smaller engines that use heat exchangers in >> marine applications, but even with them the tubes in the heat >> exchanger were easily 1/4 of an inch in diameter at least, so I >can't >> imagine there bring enough cruft in the engine to plug them up. >> >> As for a coolant filter, I have only seen these on industrial Diesel >> engines, and they were more of a means to introduce and maintain DCA >> (decavitation additive) than to actually filter the system, as they >> were relatively small, the size of a typical spin on oil filter, and >> had a minimal amount of coolant flow through them. >> >> I would think that if your coolant is clean and properly mixed, there >> would be no issue with converting it to a closed system. >> >> Dan >> >> On Oct 12, 2012, at 11:46 AM, Randy Bennell <rbenn...@bennell.ca> >wrote: >> >>> Does anyone have any ideas on how one might filter coolant on an >engine? >>> I admit I have not done any sort of google search etc. I am just >putting this out here to see if anyone has encountered such a device or >has ideas of how one might create such. >>> >>> The gist of it is that I would like to filter coolant on a boat >engine. >>> I have an inboard outboard that has been run for years with lake >water pumped through it. - Only fresh water so not an issue of salt >water corrosion but never-the-less somewhat rusty looking inside. >>> I would like to install a closed system setup so that the engine >uses anti-freeze and is cooled by the fresh water going through the >heat exchanger. >>> The folks on the boating forum suggest this is not going to work >because the rust particles from the engine will clog up the heat >exchanger passages. >>> They say it should only be installed on a new engine. >>> So, my thought is that there must be some fairly simple way to >filter the water flowing through so that I can trap and remove the rust >particles. >>> >>> There is some space available on a boat so not like trying to fit >something under the hood on a car. >>> >>> Ideas? >>> >>> Randy >>> >>> > > >_______________________________________ >http://www.okiebenz.com >For new and used parts go to www.okiebenz.com >To search list archives http://www.okiebenz.com/archive/ > >To Unsubscribe or change delivery options go to: >http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
