Heat exchangers

[HappyKamper]

I have Yanmar 440 6LY2A-STP engines. I'm in need of 2 heat exchangers. Both have severe corrosion.
Do I go to a aftermarket shop and have new ones made or try for Yanmar stock ?

 

[boatbum]

Severe corrosion or do they need to be boiled out? Any photos?

 

[HOGAN]

If they need to be cleaned, I just took mine to a guy in South Jersey who does sonic cleaning

 

[PascalG]

How old are they? Do you change the zincs as needed? Outside corrosion or inside ?

 

[HappyKamper]

 

[HappyKamper]

 

[HappyKamper]

I have ordered 2 aftermarket coolers. There is a manufacturer near me called Lenco. Apparently they sell across the country.
They are 19 years old with 800 hours.

 

[PascalG]

They don’t look too bad but 19 years old… good call. Hours are irrelevant, it s about age.