Does anyone have a procedure for cleaning out a heat exchanger? I have a 3" dia. one on my Universal M25XP that looks like it has been some time since anyone paid it any attention. I would like to "do it myself" rather than send it out.
I used Salt-X, 5 gallon pail, bildge pump and hose to conect bildge pump to raw water side of heat exchanger. Then another hose back to the 5 gallon pail. I ran the bildge pump untill the water was very dirty then replaced with clean water and Salt-x untill there water was not nasty any more.
I strongly recommend that you use a non-acidic heat exchanger de-scale compound. Most
DIYers and many mechanics pickle heat exchangers and engine internals with muriatic (HCl) acid - the result being a lot of dissolved metal. Use RydLyme or Marsolve. Get a small vane pump and recirculate it through the exchanger, etc.