Page 1 of 2 12 LastLast
Results 1 to 10 of 11
  1. #1
    Join Date
    May 2010
    Location
    Muskoka, Ontario
    Posts
    390

    Default Cleaning threads of block drain ports and transmissions drain plugs

    After putting back the plugs on the block and transmission from winterization I noticed they were heavily crusted with rust and had a hard time threading them back in. I was able to clean them enough to get the plugs back in but they don't go in very deep and didn't want to reef on them hard in case they were going to ruin the threads.

    What do you guys do to clean the threads? Do you use an SAE tap and re tap them carefully to clean out the rust etc?

  2. #2
    Join Date
    Jul 2010
    Location
    Vicksburg, MI
    Posts
    536

    Default Re: Cleaning threads of block drain ports and transmissions drain plugs

    Run a tapered pipe tap in the hole. Do not cut the treads deeper, just clean them. Next fall, coat the threads with grease or vasoline to keep the rust off.

    Sent from my Droid Charge using Tapatalk 2
    Joe

    2014 LSV
    2010 Outback V - Sold

  3. #3
    Join Date
    Jan 2008
    Location
    Pensacola, FL
    Posts
    1,544

    Default

    The store sells thread taps and thread cleaners. You want a cleaner, they look very similar. Use it to clean out the threads and put grease or vasoline on the thread cleaner to keep the stuff in the goop and not in the head.

    Anti-sieze the plug threads to help prevent corrosion.
    1997 MasterCraft 205

    2008 Moomba Outback
    1999 MasterCraft Sportstar OB
    1992 MasterCraft 205
    1999 Malibu Response LX
    1987 Marlin Magnum Skier

  4. #4
    Join Date
    Aug 2011
    Posts
    1,088

    Default Re: Cleaning threads of block drain ports and transmissions drain plugs

    Pb blaster next time you pull them out..

    Sent from my Nexus 4 using Tapatalk 2
    2002 Moomba Mobius LSV - Sold
    2006 Moomba Mobius LSV

  5. #5
    Join Date
    May 2010
    Location
    Muskoka, Ontario
    Posts
    390

    Default

    Quote Originally Posted by parrothd View Post
    Pb blaster next time you pull them out..

    Sent from my Nexus 4 using Tapatalk 2
    Anyone know off the top of their head what size it is? 1/4" NPT?

  6. #6
    Join Date
    Jul 2010
    Location
    Vicksburg, MI
    Posts
    536

    Default Re: Cleaning threads of block drain ports and transmissions drain plugs

    If you use a 9/16" wrench to take the plug out, which I believe is true, then yes it is 1/4" NPT.

    Sent from my Droid Charge using Tapatalk 2
    Joe

    2014 LSV
    2010 Outback V - Sold

  7. #7
    Join Date
    Mar 2008
    Location
    Vancouver WA
    Posts
    2,630

    Default Re: Cleaning threads of block drain ports and transmissions drain plugs

    I would coat the threads both the plug and the hole w/ never-seize after you clean the threads.

    Sent from my iPhone 5... ya right!


    PWI as usual...

  8. #8
    Join Date
    Nov 2010
    Location
    Katy, TX
    Posts
    4,185

    Default Cleaning threads of block drain ports and transmissions drain plugs

    Why do you leave them out all winter? I take mine out, and after it drains I put them back in


    Sent from my iPhone
    David

    2008 Mobius LSV, Gravity III , Wake Plate, Z5, Exile SX65c's, Exile XM9s, Exile XI12D, Exile Harpoon, Exile SM600.1 , Exile Xi800.4.

  9. #9
    Join Date
    May 2010
    Location
    Muskoka, Ontario
    Posts
    390

    Default

    Quote Originally Posted by rdlangston13 View Post
    Why do you leave them out all winter? I take mine out, and after it drains I put them back in


    Sent from my iPhone
    I didn't, dealer took out all the plugs and left them in the cup holder all winter. I only noticed when I went to go summerize the boat this year.

  10. #10
    Join Date
    Jul 2002
    Location
    London Ontario Canada
    Posts
    1,851

    Default

    Quote Originally Posted by loudsubz View Post
    I didn't, dealer took out all the plugs and left them in the cup holder all winter. I only noticed when I went to go summerize the boat this year.
    That way they can justify a paltry to exorbitant summarization charge.
    09 21v LAUNCH

    run your engine after you change your oil
    68 th Member. WS420,HSE Revolution, OJ 466, Acme1157,1100 sacs,Kicker HLCD's n IX500.4, Supra Coolies
    Doug

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •