Hi Bill...took off whole unit..let him take apart. the oil cooler is /was located below and behind aftercooler, so it made sence to take both.
The report from stew was that there was NO electrolysis showing. which leads me to again think my prop problem is/was ALL cavitation
Have no $bill yet, so dont know.
Do you know where I can get some RYDLYME ?
Tomy, if you want to clean the heat exchanger yourself, easy enough to do with muriatic acid. His some pics of a 6BTA heat exchanger. Same as your 6CTA, maybe a bit smaller. Less expensive than Rydlyme.
I pulled the following off a boatdiesel post by Tony Athens.
"Do it yourself.. Take it off, rod it out initially with a 1/8 welding rod.. Then put the cap and gasket back on the alternator end.. Stand the unit upright and fill the saltwater side up with 10:1 water & HCL
( pool acid) and let it bubble smoke and puke for about 2-3 hrs.. Keep filling as needed.. It will be perfect when you are done.. Remove the zinc and plug that hole too..
Way better than the radiator shop and easier on the unit "