Official Cummins 6cta 450C thread

Discussion in 'Diesel Engines/Drives/Transmissions/Props' started by FeLizDream, Apr 24, 2016.

  1. Ben1553

    Ben1553 New Member

    14
    Aug 23, 2018
    Solomons Island, MD
    2002 410 Express Cruiser "Vice"
    Dual Simrad NSS12 EVO2 w/ Halo 3 Open Array and structure scan
    Cummins 6CTA 8.3M 450C
    Yes...all alternators are rebuildable. Some shops rebuild better than new. You just need to find a reputable shop.
     
  2. ZZ13

    ZZ13 Well-Known Member GOLD Sponsor

    Nov 25, 2009
    Lady's Island, SC
    2001 400 Sedan Bridge
    Cummins 450 Diamond
    When one of mine went I bought a brand new (not rebuilt) one from sbmar for a whopping $450. Then I bought a rebuilt one for $120 to keep on board as a spare.

    So you might want to listen to everyone else's advice... Although that expensive one is definitely pretty darn robust. And it starts putting out immediately at low rpm. You don't need to kick the engine up to 1000 rpm to activate it.
     
  3. fr8dog

    fr8dog Active Member

    286
    May 25, 2012
    Florida
    Currently Boatless
    460DA
    300DA
    370EC
    Boatless
    You can also buy a new Delco Remy from a truck parts store for considerably less. They work perfectly. Check out their website.
     
  4. PMC

    PMC Well-Known Member

    Apr 10, 2009
    Long Island, NY
    2001 40 Sedan Bridge
    Cummins 6CTA
    If you have a website link, I'll check it out....thanks!
     
  5. PMC

    PMC Well-Known Member

    Apr 10, 2009
    Long Island, NY
    2001 40 Sedan Bridge
    Cummins 6CTA
    I assume this is the 3 wire version that SBMAR sells? I looked quick (on a hot engine last night) and it seems there was 2 wires. 1 heavy to the battery, and a single wire in a molex type connector. Does that sound right?
     
  6. PMC

    PMC Well-Known Member

    Apr 10, 2009
    Long Island, NY
    2001 40 Sedan Bridge
    Cummins 6CTA
    The stock alternator is a common item: Delco Remy 22SI 12V/130A
    I looked at SBMAR, they have the 160amp version for $450, and I'm taking my chances with DB Electrical ($94). I'll need to swap the pulley.
     
  7. ZZ13

    ZZ13 Well-Known Member GOLD Sponsor

    Nov 25, 2009
    Lady's Island, SC
    2001 400 Sedan Bridge
    Cummins 450 Diamond
    It's the two wire version. One big wire to battery by way of starter and a small wire that plugs into bottom of alternator that monitors battery voltage. And yes, I went with 160 amp, although since I pulled off my grid heaters probably not as important.
     
  8. manfredr

    manfredr Member

    30
    Apr 3, 2008
    Westport, CT
    420 Sedan Bridge 2004
    Cummins 450C
    I have and it fixed my problem!
     
  9. manfredr

    manfredr Member

    30
    Apr 3, 2008
    Westport, CT
    420 Sedan Bridge 2004
    Cummins 450C
    I have used the DB Electric ones on both engines to replace the original Delco 22SI. They have been working 5 years plus. Can’t beat the price!
     
  10. fr8dog

    fr8dog Active Member

    286
    May 25, 2012
    Florida
    Currently Boatless
    460DA
    300DA
    370EC
    Boatless
    Just go to Delcoremy.com The new style 24SI works great.
     
  11. PMC

    PMC Well-Known Member

    Apr 10, 2009
    Long Island, NY
    2001 40 Sedan Bridge
    Cummins 6CTA
    Did you need to change any of the alternator wiring?
     
  12. ZZ13

    ZZ13 Well-Known Member GOLD Sponsor

    Nov 25, 2009
    Lady's Island, SC
    2001 400 Sedan Bridge
    Cummins 450 Diamond
    Nope. Super easy. Disconnected big power wire from the old alternator. Unplugged twin lead monitor plug (only one of the two leads used). Swapped alternators and reconnected the same wires. The new alternator came with a new monitor wire plug. But I just plugged the old one into the new one. Same form factor. I'm sure Tony speced then to be exact replacements. I'll take a picture later today.
     
    Jaybeaux likes this.
  13. PMC

    PMC Well-Known Member

    Apr 10, 2009
    Long Island, NY
    2001 40 Sedan Bridge
    Cummins 6CTA
    Thanks Bill......installed and charging great again! Not sure why I keep putting back the belt shroud though. That is one pain in the ass on the stbd engine with it right up against the coolant overflow bottle.
     
  14. ZZ13

    ZZ13 Well-Known Member GOLD Sponsor

    Nov 25, 2009
    Lady's Island, SC
    2001 400 Sedan Bridge
    Cummins 450 Diamond
    Yup. I have to remove my overflow bottle and move it out of the way to get that belt cover on and off. So I've cut back on the number of screws holding it up from six to four. And I have to rig up some kinda of socket and tape gizmo to get that bottom belt guard bolt on. My arm is too short.
     
  15. PMC

    PMC Well-Known Member

    Apr 10, 2009
    Long Island, NY
    2001 40 Sedan Bridge
    Cummins 6CTA
    That is funny with the tape. I was showing my 9 year old son some of dads tape on the bolt tricks......I remove the radiator (4 bolts) and pull it away to remove the shroud. My overflow is not touched
     
  16. ZZ13

    ZZ13 Well-Known Member GOLD Sponsor

    Nov 25, 2009
    Lady's Island, SC
    2001 400 Sedan Bridge
    Cummins 450 Diamond
    All done. Found a new elbow at the local plumbing store. It was much easier to use a wrench on this new elbow fitting. One more dab of touch up paint left to go.
     

    Attached Files:

  17. All's Well

    All's Well Active Member PLATINUM Sponsor

    576
    Jan 14, 2010
    Houston
    '03 460DA
    6CTA's
    Alternators are rebuildable - and aren't that bad. Find a good rebuild shop and you'll be good to go
     
  18. PMC

    PMC Well-Known Member

    Apr 10, 2009
    Long Island, NY
    2001 40 Sedan Bridge
    Cummins 6CTA
    Thanks, I went with a new unit. Tbe boat was out of commission for 3 days!
     
  19. PMC

    PMC Well-Known Member

    Apr 10, 2009
    Long Island, NY
    2001 40 Sedan Bridge
    Cummins 6CTA
    Bill, what was the symptom that you did all this work? Were you leaking fuel at the banjo fitting? Assuming this was one engine, just currious if you did both engines from a preventative measure.
     
  20. ZZ13

    ZZ13 Well-Known Member GOLD Sponsor

    Nov 25, 2009
    Lady's Island, SC
    2001 400 Sedan Bridge
    Cummins 450 Diamond
    Fuel was weeping out from the elbow threads going into the big long nut at the end of the banjo pipe. I guess it wasn't tight enough and/or sealant failed. It only leaked with engine off, since with engine on that fuel line is under suction. Been that way since I bought boat in 2013. Banjo washers weren't leaking at all. I had a similar problem a few years ago at one of the fittings going into the fuel selector valves in the cockpit. That one I just removed the fitting, cleaned all the threads and then put new sealant on and tightened it back on.

    Other engine is fine. Fitting is bone dry. I didn't touch it.
     

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