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    • Cummins Marine Forum Topics
    • Pressure testing coolant system

      This topic has 4 replies, has 3 voices, and was last updated bycj.brown1056 3 years ago

      June 27, 2019 at 7:15 am i have a pair of Cummins 6CTA8-3 engines on a SeaRay 2005 4200 Sundancer that i have had coolant leaks on. I want to buy a pressure tester but do not know what size the neck is on the coolant tank. lots of cheap testers out there but it seems the better ones have few adapters. Anyone know the size of the neck and a recommendation on a reasonably priced pressure tester?

      Started by: JEROLD MARMER in: Cummins Marine Engines

      4 Replies
      September 29, 2020 at 11:26 am No, I hadn’t. Thanks so much. Greatly appreciated.

      Last Post by: cj.brown1056 posted: 3 years ago

    • Winterizing Anti Freeze

      This topic has 3 replies, has 2 voices, and was last updated byRob Schepis 5 years ago

      September 10, 2018 at 2:19 pm is it ok to use a winterizing anti freeze that has alcohol in it in a 6cta-8 engine

      Started by: JEROLD MARMER in: All Other Marine Diesels

      3 Replies
      September 12, 2018 at 4:22 am If you can drain the water from the coolers first (remove zincs and reinstall) and drain your mufflers then you don’t have to worry about any dilution issues and you will use less. Depending on you setup 6 gallons should be more than enough to ensure a solid pink out the back. Here’s 6 gallons ran through my 6BTA’s. I do pull the zincs to drain the seawater so the engine is getting straight pink as soon as she fires and pul…

      Last Post by: Rob Schepis posted: 5 years ago

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