1. Registration trouble? Please use the "Contact Us" link at the bottom right corner of the page and your issue will be resolved.
    Dismiss Notice

Overthinking Gaskets…

Discussion in 'Early CJ5 and CJ6 Tech' started by Fresbone, Feb 19, 2024.

  1. Feb 20, 2024
    colojeepguy

    colojeepguy Colorado Springs

    At the foot of...
    Joined:
    Apr 4, 2010
    Messages:
    7,228
    I hesitate to brag about this because I don't want to jinx it, but I put my T18/D18/OD together about 9 months ago with Right Stuff and it's still dry...no leaks! I've never had a truly leak free 18 before!
     
    Stakebed, Ol Fogie, dnb71R2 and 2 others like this.
  2. Feb 20, 2024
    Keys5a

    Keys5a Sponsor

    Florida Keys
    Joined:
    Jan 23, 2014
    Messages:
    4,218
    For paper gaskets, I use Permatex copper spray. I use Permatex #2 or Aviation on the shafts and on bolt threads, and yoke splines.
    I use a skim of The Right Stuff on valve cover and pan gaskets, and a bead on V8 intake valleys.
    -Donny
     
    Ol Fogie likes this.
  3. Feb 20, 2024
    colojeepguy

    colojeepguy Colorado Springs

    At the foot of...
    Joined:
    Apr 4, 2010
    Messages:
    7,228
    I used this on the D18 output shims.
     
    Ol Fogie likes this.
  4. Feb 20, 2024
    vtxtasy

    vtxtasy oldbee 2024 Sponsor 2023 Sponsor

    Tucson, AZ
    Joined:
    Feb 5, 2006
    Messages:
    1,483
    The Permatex #2 is silicone unlike the old stuff that was a bear to remove. For a silicone, I have had good luck with the Right Stuff in an oil environment.
     
    Ol Fogie likes this.
  5. Feb 20, 2024
    Steve's 70-5

    Steve's 70-5 Active Member

    Louisville, Ky
    Joined:
    Nov 12, 2009
    Messages:
    1,383
    Right Stuff is what to use. Make sure the metal surfaces are clean and free of oil film.
     
    Ol Fogie and vtxtasy like this.
  6. Feb 21, 2024
    Fresbone

    Fresbone Member 2023 Sponsor 2022 Sponsor

    Fresno, California
    Joined:
    Jul 29, 2022
    Messages:
    473
    You better go put a drip pan under your jeep just to ward off the woof gods!
     
    Ol Fogie, colojeepguy and vtxtasy like this.
  7. Feb 21, 2024
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Hills of NH
    Joined:
    Aug 3, 2003
    Messages:
    9,887
    What???
     
    Ol Fogie likes this.
  8. Feb 21, 2024
    45es

    45es Active Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Naches, WA
    Joined:
    Mar 31, 2007
    Messages:
    1,113
    Not according to the MSDS. The material safety data sheet does not list any silicone in its chemical makeup.
     
    Ol Fogie likes this.
  9. Feb 21, 2024
    Keys5a

    Keys5a Sponsor

    Florida Keys
    Joined:
    Jan 23, 2014
    Messages:
    4,218
    The Permatex #2 I use is the nasty brown stuff with the brush in the cap. It looks like thick molasses. Isopropyl alcohol is about the only thing to get it off your hands.
    -Donny
     
    Ol Fogie likes this.
  10. Feb 21, 2024
    vtxtasy

    vtxtasy oldbee 2024 Sponsor 2023 Sponsor

    Tucson, AZ
    Joined:
    Feb 5, 2006
    Messages:
    1,483
    You are correct. I had done a quick look from here. Still a nasty product to clean up IMO.
    https://www.autozone.com/sealants-g...ealant-slow-dry-non-hardening-3-oz/526681_0_0
    PRODUCT SPECIFICATIONS
    Part # 80016
    SKU # 526681
    Weight 0.25lbs
    Maximum Temperature Rating 400.0
    Material Silicone
     
    Ol Fogie likes this.
  11. Feb 21, 2024
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Hills of NH
    Joined:
    Aug 3, 2003
    Messages:
    9,887
    Well if it was on the internet, it must be true.
     
    Stakebed, Ol Fogie and vtxtasy like this.
  12. Feb 22, 2024
    kenb

    kenb Cleverly disguised as a responsible adult

    Detroit
    Joined:
    Jan 22, 2019
    Messages:
    681
    Timely thread. I'm getting ready to do a rear main seal on my TJ and was debating in my head what to use on the oil pan gasket. I'm sure RTV would seal it but I'm afraid of blobs breaking off on the inside and clogging the oil pickup. I'm a fan of aviation #2 sealer but that goes on relatively thin. I suppose I'll have to see if there are any significant imperfections in my oil pan. I also should see what the FSM calls for.
     
    Ol Fogie likes this.
  13. Feb 22, 2024
    Ol Fogie

    Ol Fogie 74 cj5 304, 1943 mb

    Southern...
    Joined:
    Nov 24, 2019
    Messages:
    1,840
    Ah, if auto manufacturers would just make all cast oil sumps, gear covers and valve covers with O-Rings like my xt500 yamaha. :bananatool:.
     
    vtxtasy likes this.
  14. Feb 22, 2024
    amboynut

    amboynut Member

    Chelatchie, WA
    Joined:
    Aug 25, 2021
    Messages:
    318
    Long, long ago in a galaxy far, far away I was a technical trainer for Honda motorcycle. Crankcase halves were bolted together with the tiniest smear of sealant. No gasket. We strongly cautioned against over application of any sealant, especially RTV. To illustrate the point we once bolted a CB750 bottom end together dry. No Leaky.
     
  15. Feb 22, 2024
    Keys5a

    Keys5a Sponsor

    Florida Keys
    Joined:
    Jan 23, 2014
    Messages:
    4,218
    Thats how I assemble VW air cooled engines; Permatex aviation brushed on the case half. Never had a leak,
    -Donny
     
    Ol Fogie and vtxtasy like this.
  16. Feb 22, 2024
    vtxtasy

    vtxtasy oldbee 2024 Sponsor 2023 Sponsor

    Tucson, AZ
    Joined:
    Feb 5, 2006
    Messages:
    1,483
    I have sealed split motorcycle cases and transmissions and used the Honda recommended sealer with no problems. It was a silicone base like Ultra Gray.
     
    Ol Fogie likes this.
  17. Feb 22, 2024
    Fresbone

    Fresbone Member 2023 Sponsor 2022 Sponsor

    Fresno, California
    Joined:
    Jul 29, 2022
    Messages:
    473
    Off on a tangent, but I used permatex gasket remover after I got the lions share of the gasket removed. I'm not sure what any of your experience is with that product, but I'm not sure how much more effective it is than any other liquid. You certainly don't see gasket material melting off the metal!
     
    Ol Fogie, vtxtasy and Andrew Theros like this.
  18. Feb 22, 2024
    termin8ed

    termin8ed I didn't do it Staff Member

    Mason, MI
    Joined:
    Dec 22, 2002
    Messages:
    4,426
    Whatever you use, just make sure it's compatible with the fluid it's containing. Chrysler had about 3 different rtv's for axles. If you mixed 2 if them together they would react and get white crystally snowy stuff growing from it. They also had red gasket maker gooop that worked on transmission and tcase halves. The grey stuff they use on the 3.6 will glue just about anything together. Isn't rubbery like silicon rtv's
     
    Last edited: Feb 23, 2024
    Fresbone, vtxtasy and Jw60 like this.
  19. Feb 23, 2024
    amboynut

    amboynut Member

    Chelatchie, WA
    Joined:
    Aug 25, 2021
    Messages:
    318
    Right. I believe it was a Japanese product called 3 Bond (not 3M). The process was to apply the thinnest possible bead from the tiny squeeze tube, then wipe it off with your finger. The remaining nearly imperceptible film was all that was required.
     
    Ol Fogie and vtxtasy like this.
New Posts