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    • Cummins Marine Forum Topics
    • Walker airsep drain

      This topic has 3 replies, has 2 voices, and was last updated bypmerklinger59 3 years ago

      November 26, 2020 at 11:25 am Hi, hope all are well on this site, i have a 2005 5.9qsb 380ho.It has the stock Walker air sep, at the bottom of the sep there is a drain hose (blue) that runs to the bottom of the block on the right side of the motor. This hose runs into a one way valve that screws into a ypipe that goes into the block. The y pipe is rusted and broken off. I have tried everywhere to find this pipe and have exhausted everywhere. Has anyone else run into this, is…

      Started by: pmerklinger59 in: Cummins Marine Engines


      3 Replies
      November 30, 2020 at 2:23 pm No luck finding part so we put a 18 thread pitch quarter pipe tap through the block and installed the check valve into the block eliminating the y-pipe (pictured in the last pic) . Seemed to work and fit good.

      Last Post by: pmerklinger59 posted: 3 years ago

    • Flushing engine

      This topic has 1 reply, has 2 voices, and was last updated byJ Dragon 3 years ago

      August 31, 2020 at 10:34 am 6 CTA Cummings – I flushed my engine a few weeks ago with barnacle buster. Last weekend I wanted to take a peak inside the heat exchanger and replace the end cap gaskets. It was pretty clean but my assumption was that the heat exchanger always has water in it. Since it doesn’t, what’s the best way (without removing the heat exchanger) to flush it if barnacle buster isn’t actually staying inside the heat exchanger?

      Started by: Dave Galehouse in: Cummins Marine Engines


      1 Reply
      August 31, 2020 at 12:26 pm Disconnect hose off your raw water pump, and also your hose exiting the heat exchanger. Rig a temporary hose and circulating pump between those two lines with a bucket of barnacle buster or ryde lyme or whatever plumbed into the loop, and circulate the goodies in the system for several hours.

      Last Post by: J Dragon posted: 3 years ago

Viewing 2 topics - 1 through 2 (of 2 total)