Sean,
Here is the post about cleaning the heater core with an acid cleaner.
I did not try this as was not sure what metal the heater core was made of. I stuck with the prestone flush.
https://www.turbodieselregister.com/forums/search.php?searchid=1584609
Regards,
Steve
Here is the post about cleaning the heater core with an acid cleaner.
I did not try this as was not sure what metal the heater core was made of. I stuck with the prestone flush.
https://www.turbodieselregister.com/forums/search.php?searchid=1584609
Regards,
Steve