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Thread: COT o-rings

  1. #1
    Join Date
    Dec 2008
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    South Carolina
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    Unhappy COT o-rings

    So I got a used cot from spectragod installed it and 6 months later I got air in the system (amen nothing happened) so I was burping the system and found that there's no o-ring on the cot cap!. made 3 trips to the flaps and the rings won't seal right. Called the dealer they don't even know what I'm talking about !. So what's the point to my story watch your rings a cooling system is nothing to play with. And does anyone know where I can find this ring
    03 300a. black #1695 of 7839 born 6/20/02.
    Adopted 3/31/11. Sold


    03 300a black #1199
    TERMINATOR SWAP
    430rwhp. Done by mo's

  2. #2
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    I found that you have to file the sharp edge inside the receiving end of the plug or it literally cuts the O rings in half. I bought a big container of many different sizes of Viton O-rings at harbor freight for cheap money.
    11.931 @ 116.33 (MT ET Streets)
    12.073 @ 118.43 (Nitto 555)

    I love the smell of Nitromethane and rubber in the morning!
    Drag racers prayer:
    As I lay rubber down the street, I pray for traction I can keep, but if I spin and begin to slide, please dear God protect my ride." -Amen

  3. #3
    Join Date
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    Quote Originally Posted by RacerX View Post
    I found that you have to file the sharp edge inside the receiving end of the plug or it literally cuts the O rings in half. I bought a big container of many different sizes of Viton O-rings at harbor freight for cheap money.
    Did the same when I pulled mine apart. Leak free for about 10k now and no issues with air getting into the system..

    Was like $5-10 for the kit vs the $20-30 from my local stealership.

    Sent from my SPH-D710 using Tapatalk
    04 SB MM RIP 4/24/09
    Number 553 of 3213 04s, 208 of 993 Silvers 04s

    03 SB MM (the new girl)
    Born 5/15/2003, Adopted 7/17/09
    Number 7458 of 7838 03s, 225 of 417 Silver 03s

    Mods: K&N CAI, 180° stat, SW headers, custom 2.5" h-pipe exhaust from headers to tips w/Dynomax VT mufflers, Part of the Art Carr Stage 2 tranny kit, rebuilt with Alto Black bands and clutches, deep transmission pan, big ass trans cooler, PI 3.5k rpm Triple disk TC, Dynotech 4" driveshaft, Metco Drive shaft loop and rear CA's, Addco front and rear sway bars, just a bit of powder coating, stock size performance brake upgrades, QA1 shocks in the rear with KYBs in the front, and replaced every stock suspension bushing. Tuner's Inc tuned 298 rwhp/306 rwtq
    .


  4. #4
    Join Date
    Feb 2009
    Location
    Upstate NY
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    I bought 2 o rings for my COT (COT to HEADS) at Ford dealer for like $6
    2021 F150 XLT Super Crew short bed - no chrome! - 3.5 Ecoboost 400hp/500tq - 36 Gal tank (600 miles) - 4x4 FX4 Offroad + Max Tow - 3.55 Locker - 10 Speed - Pro Power 2kva - 24mpg @ 80 Ford is still the best.
    03 300A - Number 1727
    - Super Touring - 10k in the best upgrades - 13.8@99 N/A - SOLD
    - STAP was so much fun, loved meeting you all and racing.



  5. #5
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    Cape Cod, MA
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    I have had to cot cap of a few times I have never noticed a rubber o ring. Are you talking about the cap with the allen head ?
    2004 marauder black purchased new. Sold 9/16 at 297,000 miles. Still ran strong didn't burn a drop of oil.
    2003 marauder black 28,000 miles all stock. Garage Queen.
    2004 marauder red daily driver.

  6. #6
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    Quote Originally Posted by burt ragio View Post
    I have had to cot cap of a few times I have never noticed a rubber o ring. Are you talking about the cap with the allen head ?
    Yes, the COT fill plug. There's a small O-ring on that, an O-ring on each leg that goes into the heads and two O-rings when you pull the COT apart into two seperate pieces. Most people don't know that the COT is actually two pieces.
    11.931 @ 116.33 (MT ET Streets)
    12.073 @ 118.43 (Nitto 555)

    I love the smell of Nitromethane and rubber in the morning!
    Drag racers prayer:
    As I lay rubber down the street, I pray for traction I can keep, but if I spin and begin to slide, please dear God protect my ride." -Amen

  7. #7
    Join Date
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    Quote Originally Posted by burt ragio View Post
    I have had to cot cap of a few times I have never noticed a rubber o ring. Are you talking about the cap with the allen head ?
    Yes the cot coolant cap. There's a o-ring for every end that the cot connects to
    03 300a. black #1695 of 7839 born 6/20/02.
    Adopted 3/31/11. Sold


    03 300a black #1199
    TERMINATOR SWAP
    430rwhp. Done by mo's

  8. #8
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    Quote Originally Posted by RacerX View Post
    I found that you have to file the sharp edge inside the receiving end of the plug or it literally cuts the O rings in half. I bought a big container of many different sizes of Viton O-rings at harbor freight for cheap money.
    I guess this pack you got replaced all cot rings?
    03 300a. black #1695 of 7839 born 6/20/02.
    Adopted 3/31/11. Sold


    03 300a black #1199
    TERMINATOR SWAP
    430rwhp. Done by mo's

  9. #9
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    I only needed to replace the fill plug o ring, but, figured I may as well get a random assortment for the price. http://www.harborfreight.com/205-pie...kit-67644.html

    I have a new Ford 03/04 termi upper rebuild kit that has all the gaskets and rings for heads, Eaton parts, coolant, etc.
    11.931 @ 116.33 (MT ET Streets)
    12.073 @ 118.43 (Nitto 555)

    I love the smell of Nitromethane and rubber in the morning!
    Drag racers prayer:
    As I lay rubber down the street, I pray for traction I can keep, but if I spin and begin to slide, please dear God protect my ride." -Amen

  10. #10
    Join Date
    Apr 2011
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    Wheeling, WV
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    41
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    1,309
    I have the ford part numbers for the COT o rings at home. When I get off work I will post it.

  11. #11
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    #391533-s100 i believe that is the correct part number for the crossover tube o-rings.

  12. #12
    Join Date
    Aug 2005
    Location
    Houston TX
    Posts
    725
    these are the other ones the COT uses

    391533-S100





    Car is soon to be for sale...

    03 300A: Full SW exhaust (sold their crappy mufflers for $50 and replaced w/ Dynomax and factory tips), JLT, GMS connectors, NGK, 4.10, lowered, Zack fuel filter mod, Xcal tune, Musclemerc catch can. Non go fast stuff: Tint, Vinyl wrapped chrome, badgeless, spoiler, blendmount and hardwire V1, trunk organizer, factory changer, BC4E Dead pedal

  13. #13
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    Thanks erbody.
    03 300a. black #1695 of 7839 born 6/20/02.
    Adopted 3/31/11. Sold


    03 300a black #1199
    TERMINATOR SWAP
    430rwhp. Done by mo's

  14. #14
    Join Date
    Jun 2008
    Location
    Waukesha, WI
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    You "feel" the difference because you want to "feel" the difference. Since you just spent money on the upgrade you "have" to feel the difference

    I'm looking to eliminate the double pump process I have to follow right now to get the pedal hard

    2004 300A Procharger #0010 D1X
    2003 300A Procharger #0017 D1SC (SOLD. Last I heard, it was in Washington State)

  15. #15
    Join Date
    Sep 2008
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    USA
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    I decided to end my COT fill cap woes and went with one of these:

    http://forums.corral.net/forums/svt-...d-problem.html

    It moves the O-ring deeper, eliminating the edges cutting the O-ring or other fitment issues.
    Ex Panther Owner

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