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Thread: Pipe of Agony O-Ring and Securing Ring Prep?

  1. #1
    Senior Member
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    Pipe of Agony O-Ring and Securing Ring Prep?

    Hey all,

    When I disassembled my intake manifold, the pipe of agony already seemed kinda loose in the mixture unit and came out with a rattle. I later found the brass securing ring and the o-ring in the valley absolutely slathered with Permatex gasket sealer.

    The pipe itself was caked in it as well - I guess by the P.O. ?

    Anyway, I cleaned everything up, careful with plastic scrapers so as not to score the pipe itself, and removed all of the Permatex.

    When reassembling, I was told to prep the o-ring with grease. Any particular kind? Or should I use Permatex again? (Frankly it looked like a hack job mess when I removed it.)

    Thanks,
    RUNDMC
    With DeLoreans, real knowledge comes only with experience.

  2. #2
    Not dead yet, also Admin. sean's Avatar
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    Quote Originally Posted by rundmc View Post

    When reassembling, I was told to prep the o-ring with grease. Any particular kind?
    Most any kind will do. You just want to lube it to help ease the pipe in and also add to the seal.
    eBay selling at it's best I can tell you stock Delorians and quite a bit of slugs so the Turbo is a super nice up-grade.
    K-Jet: Causing electrical issues since November 5th 1955

  3. #3
    Senior Member
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    Thanks
    With DeLoreans, real knowledge comes only with experience.

  4. #4
    DMC Midwest - 815.459.6439 DMCMW Dave's Avatar
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    The brass ring is supposed to be "staked" in place, i.e. a tight fit. This is about impossible to correct with the air metering assembly in place on the engine. So - someones workaround was gasket glue.
    Dave S
    DMC Midwest - retired but helping
    dswingle@DeLorean.com

  5. #5
    One of those purists you keep hearing about. sdg3205's Avatar
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    Despite my best efforts, my brass ring never stays in place. The rubber washer does, which prevents the vacuum leak, but I was wondering if a little gasket sealer on the washer then the ring would be permissible.
    Dave

    Here, somewhere.


  6. #6
    Not a DeLorean Guru
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    Quote Originally Posted by sean View Post
    Most any kind will do. You just want to lube it to help ease the pipe in and also add to the seal.
    Yes, one should always use lube to ease it in.
    -Mike
    1981 DeLorean, Carb LS4 swap in progress
    1999 Corvette, cam/headers/intake manifold, 400 rwhp
    2005 Elise, stock
    2016 Chevy Cruze

  7. #7
    One of those purists you keep hearing about. sdg3205's Avatar
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    Quote Originally Posted by opethmike View Post
    Yes, one should always use lube to ease it in.
    Especially if it's their first time.
    Dave

    Here, somewhere.


  8. #8
    Not dead yet, also Admin. sean's Avatar
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    Quote Originally Posted by opethmike View Post
    Yes, one should always use lube to ease it in.
    Quote Originally Posted by sdg3205 View Post
    Especially if it's their first time.
    Dirty, dirty, dirty......
    eBay selling at it's best I can tell you stock Delorians and quite a bit of slugs so the Turbo is a super nice up-grade.
    K-Jet: Causing electrical issues since November 5th 1955

  9. #9
    Senior Member WelmoedJ's Avatar
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    If the brass cup does fit tightly any longer there's one way to make it larger.
    Carefully tap the material to make it get a larger diameter.
    You do that from the inside out all along the "ring" that should keep it tight.

    My car was missing the brass cup and I was told it's no longer available.
    I therefore used a large copper washer and tapped it until it was a bit larger than the opening it has to fit and stay in.
    After that I put the O-ring in and used a pipe (approx 17mm diameter) to press the copper washer in until it locked the O-ring tightly.

    It's a tedious and time consuming job, but it works.
    Don't use any sealant also because you need to be able to replace the O-ring at some point in time.
    You grease the tip of the pipe all around before pushing it in.
    Any thick grease will do.
    Welmoed
    Black D 1981-11 VIN #06513
    Toyota Prius III 2009-07

  10. #10
    Senior Member Bitsyncmaster's Avatar
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    I used a thick loctite to lock the brass ring in with great success. Of course the mixture unit has to be out of the car and clean the areas to get a good bond. Also keep the loctite off the O-ring.
    Dave M vin 03572
    http://dm-eng.weebly.com/

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