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    • Cummins Marine Forum Topics
    • QSB 6.7 After cooler Flush

      This topic has 19 replies, has 9 voices, and was last updated bygerryc 3 years ago

      September 20, 2019 at 12:47 pm My engine has about 350 hours and 2 1/2 seasons of use. I want to do the Barnacle Buster flush before I haul out for the season here in the Northeast(NH Seacoast). Many good points on this forum. I will be using the groco replacement cover for the in flow. I plan to remove the exhaust hose at the heat exchanger. My question is will that hose remove easily without damage and go back easily?

      Started by: Paul McInnis in: Cummins Marine Engines

      19 Replies
      February 1, 2021 at 4:40 pm Core only slides out aft. Aluminum retainer ring slides off forward end. Cummins part number for end caps has been superseded for a new design. Using these bronze caps seems to be the best option. Five years old and 600 hours, It really needed this service…..lots of corrosion starting. I will hack saw the old cap to retrieve the bolt.

      Last Post by: gerryc posted: 3 years ago

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