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    • Cummins Marine Forum Topics
    • 6CTA Coolant leak on top of exhaust manifold 1 2

      This topic has 35 replies, has 7 voices, and was last updated byBob Foster 5 years ago

      January 23, 2019 at 9:07 pm Hello, Iā€™m hoping to get some advice regarding a coolant leak that I noticed today while checking on my boat. I have a 1999 Formula 41pc fitted with twin Cummins 6CTA Diamonds. After the cold snap that we just had in Philadelphia I decided to check on the boat as it is on the hard for the winter. During my inspection in the engine room, I spotted engine coolant resting ontop of the port exhaust manifold. It appears to be coming from some type …

      Started by: Bob Foster in: Cummins Marine Engines

      35 Replies
      February 24, 2019 at 4:19 pm I finally had some free time to stop by the boat today and get the exhaust manifold cap gasket done. I got completely sidetracked and did the Aftercooler service but the whole purpose of this post was regarding the manifold cap gasket leaking. I started by draining about 3 gallons of coolant from the exhaust manifold. I was able to drain the mainifold by removing the bung plug on the turbo. I circled it in the picture. To ensure that the coolant…

      Last Post by: Bob Foster posted: 5 years ago

    • Oil pan bolt missing

      This topic has 2 replies, has 2 voices, and was last updated byBob Foster 5 years ago

      October 29, 2018 at 10:32 am Hello everyone, I am new on the forum here and also new to Diesel power in general having just upgraded from a 1997 SeaRay 330DA with twin 7.4MPI to my 1999 Formula 41PC with twin Cummins 6CTA’s. I have been poking around the bilge getting familiar with everything and I keep focusing on the fact that both engines seem to be leaking oil as there are absorbent mats under them collecting the leaking oil. I replaced the mats with new ones to …

      Started by: Bob Foster in: Cummins Marine Engines

      2 Replies
      December 6, 2018 at 10:07 am Tony , Thank you very much for the reply and also for confirming that the valves will need adjustment at 1000 hours. I have read most of the articles pertaining to this engine and I will definitely give the marine age article a read as well, I must say that the articles that I have read thus far have been extremely informative. Once I have some more free time I will be happy to upload some pictures of the bolt that I found in the bilge here and …

      Last Post by: Bob Foster posted: 5 years ago

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