How to remove rounded off square brass anode head?

Discussion in 'General Maintenance/Repair Questions' started by dtfeld, May 18, 2018.

  1. dtfeld

    dtfeld Water Contrails GOLD Sponsor

    343
    Jun 5, 2016
    Milton, GA
    410 Sundancer 2001
    Cat 3126 V-Drives
    Replacing Anodes, and some were brass square head. I rounded one off and have tried everything I have to get it unfrozen, PB Blaster and WD40 with wrenches for square heads, vice grips and finally a pipe wrench. Been at it 2 weeks spraying with PB Blaster every time I go by it. Limited space to get at it.

    Any suggestions before I pull the cooler and drill and tap it out? Trying to avoid that mess. This is in the transmission cooler and I have another one back on the heat exchanger.

    2B7247B6-293C-4D9B-B98D-17A71B91F98D.jpeg
     
  2. atrick

    atrick Member

    92
    Mar 4, 2017
    Penna
    1995 searay 290 Sundancer
    1990 21 maxum
    Twin 4.3 mercrusers with alpha one drives
    305 chevy with a alpha one drive
    I would get a 8 point socket smaller than what you have tap in on there and try that. You should have had a 8 point first ( not a 12 point, they slip on those ) as they have more contact surface area on the plug and normally won't slip or spin.
     
  3. PlayDate

    PlayDate Well-Known Member SILVER Sponsor

    Dec 25, 2006
    Washington DC
    1994 370 Express Cruiser
    454 Mercruisers
    I'm guessing someone put a rigid sealant on the threads. This is what I would try before I pulled the cooler out. The odds are 50/50 this will work. For certain it will snap the end off if it doesn't unscrew it.

    71O6XZ2QFsL._SL1500_.jpg
     
  4. dtfeld

    dtfeld Water Contrails GOLD Sponsor

    343
    Jun 5, 2016
    Milton, GA
    410 Sundancer 2001
    Cat 3126 V-Drives
    Hey
    Hey PlayDate.

    Where would I find one...thats not a Home Depot or even a Napa kind of buy. I guess I'll have to ask...what do you call it?

    If it snaps the end off, I'll be no worse off as I'll have to drill and tap it out. It will be easier to find the center with the chewed up head gone.
     
  5. PlayDate

    PlayDate Well-Known Member SILVER Sponsor

    Dec 25, 2006
    Washington DC
    1994 370 Express Cruiser
    454 Mercruisers
    dtfeld likes this.
  6. Leardriver

    Leardriver Member

    116
    May 24, 2016
    Denver, CO
    2004 270 Sundeck 8.1 Bravo III
    5.0, 5.7, 6.2 8.1 Bravo III over the years
    Small pipe wrench.
     
    JVM225 likes this.
  7. dtfeld

    dtfeld Water Contrails GOLD Sponsor

    343
    Jun 5, 2016
    Milton, GA
    410 Sundancer 2001
    Cat 3126 V-Drives
    I'll try this... Screenshot_20180518-182742.png
     
  8. JVM225

    JVM225 Well-Known Member

    Apr 8, 2008
    Farmingdale, NY
    2002 410 Sundancer, Monaco Edition.
    3126 Cats.
    That’s what I would try first before I ordered something and waited for it to arrive since you either have one in your toolbox already, probably know someone locally who does, or can get one at a local big box store.
    It’s the same principle as the stud extracter.
    It doesn’t have to be a particularly big one as long as it fits on the rounded head.
    If you can get the pipe wrench in there to get on it. Get it to bite, and if you need a little more leverage you can slide a little length of pipe over the handle to extend the length. A short length of PVC pipe slipped over the pipe wrench handle can be used too and if you don’t have one on hand you can get it in the plumbing aisle of your favorite big box store.
    Should make short work of it.
     
    Last edited: May 19, 2018
  9. dtfeld

    dtfeld Water Contrails GOLD Sponsor

    343
    Jun 5, 2016
    Milton, GA
    410 Sundancer 2001
    Cat 3126 V-Drives

    Unfortunately, I have already tried the pipe wrench (all 3 sizes I have in my box) and it wont move. I dont have enough throw in that area to get enough bite and get movement on the head. I'm moving into the advanced category on this one!

    I'm considering adding some heat to the extrerior, and ice the bolt to help separate, but I need a tool I can get in there and locked down on the head.

    Stud extractor looks like the next logical step. Beyond that,I'm going to have to drill and tap...its that frozen.

    I've been spraying PB Blaster on it several time a week-end hoping that will help, but nothing so far. Any other sparay penetrant ?
     
  10. JVM225

    JVM225 Well-Known Member

    Apr 8, 2008
    Farmingdale, NY
    2002 410 Sundancer, Monaco Edition.
    3126 Cats.
    If the stud extractor doesn’t work then you may want to think about just taking it out of the boat, removing it on the bench, and reinstalling the oil cooler.
    Actually, if it’s a frozen as it sounds you may want to just skip ahead to removing the oil cooler now and trying to remove the plug with a pipe wrench on the bench.
    Sounds like you may be headed that way anyhow.
    You’ll probably save yourself some time and grief.
     
  11. ZZ13

    ZZ13 Well-Known Member GOLD Sponsor

    Nov 25, 2009
    Lady's Island, SC
    2001 400 Sedan Bridge
    Cummins 450 Diamond
    If it's the original cooler I would just throw it out and buy a new one. It's well into the risk phase of its life at 17 years old (I think you have a 2001 but I may be misremembering that) and a sudden failure will damage the transmission. Replace the other engine's as well. About $300 each. Just replaced both of mine.
     
    my3sons likes this.
  12. fwebster

    fwebster Well-Known Member TECHNICAL Contributor PLATINUM Sponsor

    Oct 6, 2006
    Middle Tennessee ; Panama City Beach, FL
    1996 450DA
    3116 Caterpillars
    If you remove or replace the transmission oil coolers, go by a Caterpillar store and get/order new 90˚formed hoses for each end of the cooler.
     
  13. dtfeld

    dtfeld Water Contrails GOLD Sponsor

    343
    Jun 5, 2016
    Milton, GA
    410 Sundancer 2001
    Cat 3126 V-Drives
    I don’t know the age of the oil coolers, but they do not appear to be original. Is the a way to test?

    Of course if I don’t get a new anode in the damn thing I will need to replace.
     
  14. ZZ13

    ZZ13 Well-Known Member GOLD Sponsor

    Nov 25, 2009
    Lady's Island, SC
    2001 400 Sedan Bridge
    Cummins 450 Diamond
    I don't think the originals Sea Ray installed had zincs (my 2001 coolers did not), so yours may very well be replacements. I am not an expert but a marine transmission person told me that he highly recommends to replace them every 10 years. He said from that point on they can pressure test fine one day and then spring a leak the next day.
     
  15. LG111

    LG111 Active Member

    364
    Jan 4, 2015
    NW
    410
    8.1
    Butane touch. Heat up the head... threads and softn whatever thread lock that was previously used.
     
  16. fwebster

    fwebster Well-Known Member TECHNICAL Contributor PLATINUM Sponsor

    Oct 6, 2006
    Middle Tennessee ; Panama City Beach, FL
    1996 450DA
    3116 Caterpillars
    Be very careful using heat on brass plugs in a brass heat exchanger or cooler. The internal tube construction is assembled with solder joints that begins to break down at fairly low temperatures. You might get the thread sealer/locker to soften but if you melt the internal solder joint at the same time, you haven't achieved your goal.
     
    my3sons likes this.

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