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    • Cummins Marine Forum Topics
    • Cummins QSC 8.3 heat exchangers

      This topic has 2 replies, has 2 voices, and was last updated byScott Robson 6 years ago

      February 16, 2018 at 9:36 am As a word of caution to all who are servicing your heat exchangers, the housings have been dipped in some black coating. I would think this is an attempt to help stop corrosion between the dissimilar metals (Brass and Aluminum) and may very well help. The caution here is after you pull the cores out, do not be abusive in cleaning your housing, do not dip in acid bath, do not pressure wash, steam clean, inside or out, you will knock off this prot…

      Started by: Scott Robson in: Cummins Marine Engines


      2 Replies
      March 7, 2018 at 10:49 pm Tony I believe you are talking about after coolers, while I’m talking about heat exchangers, my after coolers do not have this coating inside, just straight aluminum housing. P.S. starting to get everybody around here to use that meta lube you suggest when putting their after coolers back together .

      Last Post by: Scott Robson posted: 6 years ago

    • Help with after cooler core removal

      This topic has 12 replies, has 7 voices, and was last updated byScott Robson 6 years ago

      January 22, 2018 at 6:27 pm Hello Everyone, Seeking some advice on removing the core from a 6bta after-cooler housing. Everything looks good from the core to the caps but I canā€™t seem to get the core to slide out. I have successfully moved it to a point where one end is flush with the housing using lots of PB Blaster and WD 40 using some persuasion and a block of wood but canā€™t get it to move any further. It looks like the plastic on the core has swelled and making things …

      Started by: Bob Neill in: Cummins Marine Engines


      12 Replies
      February 16, 2018 at 9:04 am You can also take them to some one who has a sonic cleaner , that can heat up the housing and also cleans corrosion between core and housing, or soak the whole unit ( with caps and 0-rings off) in diluted Barnacle Buster, try this before beating them out. You can clean cores with Barnacle Buster or similar product after you have them out.

      Last Post by: Scott Robson posted: 6 years ago

Viewing 3 topics - 1 through 3 (of 3 total)