Cummins Marine Diesel Repower Specialists › Forums › Cummins Marine Engines › Another QSC Exchanger/Cooler thread › Reply To: Another QSC Exchanger/Cooler thread

February 16, 2019 at 3:55 pm #58207

Tony Athens
Moderator
Vessel Name: Local Banks
Engines: QSB 6.7 550 HP
Location: Oxnard, CA
Country: USA

NO acid on the copper fins……………………..10:1 Pool acid mixed w/ water inside the tubes only, end plate and bronze caps.

Aftercooler core looks pretty good. Use spray cleaners or ultrasonic..

Aftercooler housing & sealing surfaces condition is ?

Coolant side of tubes on HX– Usually a alkaline based cleaner will clean that or ?? Try some newer spray cleaners..

Tony