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    • Cummins Marine Forum Topics
    • Low oil pressure 6CTA 450

      This topic has 8 replies, has 4 voices, and was last updated bycam 7 months ago

      August 28, 2023 at 4:04 am Hi,   I’ve got a low oil pressure problem on one of my 450s, After a run at cruise and slowing down to idle, alarm will sound, on port engine. I disconected the Cummins panel alarm a few years ago, as it was always alarming, even with 20PSI at idle. I just use a stand alone 10 psi switch, on the back up Aqua alarm panel. Engines have 7,000 hours on them and have been serviced regularly, their whole lives. Anyone have any ideas?  …

      Started by: cam in: Cummins Marine Engines

      8 Replies
      September 4, 2023 at 6:39 am Thanks Tony. I was fishing and there is no worse way to end a day, than having the oil pressure alarm ghosting, when you come back to idle! I’ll try bumping up the idle a bit and see if the shifts are still smooth. Thanks, Cam

      Last Post by: cam posted: 7 months ago

    • CTA SMX seawater pump overhaul

      This topic has 3 replies, has 3 voices, and was last updated byBill 1 year ago

      January 12, 2023 at 10:08 am Hi looking for instructions or a video on how to overhaul the SMX pumps on my 450CTAs. Iā€™ve got the kits and want to get them overhauled, as Iā€™ve got 7,000 trouble free hours on them. Theyā€™ve earned some TLC! thanks Ā  Cam Ā  Ā  Ā 

      Started by: cam in: Cummins Marine Engines

      3 Replies
      January 15, 2023 at 6:44 am Here it is: Leaking SMX pump

      Last Post by: Bill posted: 1 year ago

    • CTA 450 cylinder head torque

      This topic has 2 replies, has 2 voices, and was last updated byTony Athens 2 years ago

      October 9, 2021 at 3:39 am Hi, I have blown the head gasket on my 450 and am about to dive into removing the head, etc. I found the link under Tony’s tips for the head torque procedure and it lists the values for 26 bolts. The diagram shows 32 bolts. What is the procedure/torque values for the remaining 6 bolts? Thanks, Cam

      Started by: cam in: Cummins Marine Engines

      2 Replies
      October 16, 2021 at 2:39 pm Per my best mechanic that does this stuff quite often————-This is Accurate for the “C” 8.3 –26 bolts.. 12 x 80MM and 14 x 160 mm long————-Obviously my web site in wrong & I need to change it..

      Last Post by: Tony Athens posted: 2 years ago

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