Cummins Marine Diesel Repower Specialists › Forums › Cummins Marine Engines › Heat Exchanger Kit QSB5.9
Byron Biggs.
Hello, I am going to change the exchanger kit https://www.sbmar.com/product/6-cummins-qsb-5-9-425-480-hp-heat-exchanger-kit/ for the first time, could you tell me how to proceed? I couldn’t find any video on the net. Thank you so much John
Some might disagree with me on this but I believe scale removal is at least just as important as crud removal(within limits). I would consider a flow set up thru the raw water side of HX with a continuous flow of barnacle buster for a couple of hours to remove any scale build up.
As stated…not much too it.
Remember not to over torque the nut that screws the cap on.
Yes the end caps are the raw water side of the heater exchager.
If you remove the whole heater exchanger from the engine than you’ll be draining anti-freeze coolant.
btw, I used the distal end hx cap to pickup the water source for the PSS shaft seal on my 5.9 480
TTks
Not much to it, pull off the end caps, soak the entire thing in something like simple green. I use a .22 cleaning rod to remove and buildups in the tubes. That’s about it.
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