Joel, This applies to any engine that is fresh water cooled (i.e., has two cooling circuits - the "internal" one that uses the coolant and generally works the same as in your car, and the "external" one that uses the outboard water for removing the heat from the engine). The heat exchanger, as the name implies, is a place where the heat is exchanged between the two systems. It acts in a very similar way to your car's radiator. In a car, the heat exchange is between coolant and the air, in the boat between the coolant and the outboard water.
Marek From: Joel Delamirande via CnC-List <cnc-list@cnc-list.com> Sent: January 15, 2021 10:03 To: Stus-List <cnc-list@cnc-list.com> Cc: Joel Delamirande <joel.delamira...@gmail.com> Subject: Stus-List Re: Acid flushing heat exchanger? Is this for only Diesel engines and in sea water? On Wed, Jan 13, 2021 at 9:33 AM Della Barba, Joe via CnC-List <cnc-list@cnc-list.com<mailto:cnc-list@cnc-list.com>> wrote: If you take the end caps off the heat exchanger, you can see the tubes the raw water flows through. Flushing and replacing the coolant does not touch the inside of these tubes. To truly clean out the heat exchanger you need to remove these caps. I stuck mine in a tub of hot water and detergent, which worked OK for mild cleaning. I could seen into the tubes and there was nothing but a little slime. More robust measures are needed to remove scale and barnacles. Back in the day it was common to get car radiators boiled out at a radiator shop. If any shops are around that still do this that will clean a heat exchanger too. Joe Coquina Thanks to all of the subscribers that contributed to the list to help with the costs involved. If you want to show your support to the list - use PayPal to send contribution -- https://www.paypal.me/stumurray<https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.paypal.me%2Fstumurray&data=04%7C01%7C%7C7dcf7a16a8914d554fe308d8b966adc3%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637463197934706001%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=fpXsNgwiUXjvmDBPTvZ3dDUb837OuzSJaXIHosHAI04%3D&reserved=0> Thanks - Stu -- Joel Delamirande [https://drive.google.com/uc?id=0Bzdvlj_zFQR9UUZyRjFCM0FGejZXeGd5WFVnVTZRb0Y0Q1lZ&export=download] www.jdroofing.ca<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.jdroofing.ca%2F&data=04%7C01%7C%7C7dcf7a16a8914d554fe308d8b966adc3%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637463197934706001%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=xW0trz72FJRlPcPwmNSdjS%2FTqyAk75V%2ByhFPIFDMGyE%3D&reserved=0>
Thanks to all of the subscribers that contributed to the list to help with the costs involved. If you want to show your support to the list - use PayPal to send contribution -- https://www.paypal.me/stumurray Thanks - Stu
