School Me! Rope Style Oil Seal

Small Block Mopar Engine

  1. eekvonzipper

    eekvonzipper My Member is Legendary! FABO Gold Member

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    Would someone please school me on how to install the old rope-style rear main seal?
    and what the extra little pieces are?
    I'm assuming that they sit in the Main Cap (as pictured) before it goes in?
    Use any Sealant on this???
    Gonna set the Crank into a '65 273
    and need to do this right the 1st time.
    Thank You for any help.

    S1.jpg

    S2.jpg
     
  2. RustyRatRod

    RustyRatRod I was born on a Monday. Not last Monday. FABO Gold Member

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    Find the nearest trash can and install it there, then get a good modern rubber seal.
     
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    • eekvonzipper

      eekvonzipper My Member is Legendary! FABO Gold Member

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      What? Why?? The One I took Out lasted 55 years!?.
       
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      • RustyRatRod

        RustyRatRod I was born on a Monday. Not last Monday. FABO Gold Member

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        Ok. Use the rope seal.
         
      • eekvonzipper

        eekvonzipper My Member is Legendary! FABO Gold Member

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        Looking for Help, not the usual negative comments from you. Geez man!
         
      • RustyRatRod

        RustyRatRod I was born on a Monday. Not last Monday. FABO Gold Member

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        I was searching for a good video for you. I'm thinkin now maybe I shouldn't have.
         
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        • eekvonzipper

          eekvonzipper My Member is Legendary! FABO Gold Member

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          Now That was Helpful! Thank You Triple R!
          Was that so hard? (Lol) :thankyou:
           
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          • E7polyhachett

            E7polyhachett Member

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            When I have needed to do a rope seal, I used a wooden bare hammer handle and
            just rolled the rope seal in the block moving up one side and down the other. You
            want to take your time, and make sure it is as firm and tight as possible in the block! Just
            be very careful when it comes time to cut the seal ends as straight as you can, and flush with the block. Good luck with your install!
             
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            • Plymouth 65

              Plymouth 65 Floorable Deplorable

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              Send me your address through a PM and I'll send you a rubber seal for free. You should dump that rope seal in my opinion. 65'
               
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              • eekvonzipper

                eekvonzipper My Member is Legendary! FABO Gold Member

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                What's wrong with them? I don't get it. It's a Stock Seal for a '65 Right?
                 
              • eekvonzipper

                eekvonzipper My Member is Legendary! FABO Gold Member

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                Well, 1st Attempt Failed... I snugged down the Rear Cap and the Crank wouldn't turn...
                 
              • 1WildRT

                1WildRT Well-Known Member

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                Lotta folks seem to have zero actual experience with rope seals....
                Yes they are more work to install, the actual reason auto makers quit using ropes seals was more about speed of building an engine assemble than a better solution...

                Rope seals tend to weep a little oil but it's very rare to have one actually pour out oil... Even with 100K miles they rarely truly leak... Rubber lip seals often weep too though some actually stay dry (Pretty rare) But when a lip seal goes it's common to have it pouring oil...

                Yes the modern interpretation of a rope seal isn't as good as the original rope seals were.... Originals had asbestos in the seal, modern ones are graphite embedded...

                I watched a few minutes of the video, it seems to cover the basics....
                 
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                • RustyRatRod

                  RustyRatRod I was born on a Monday. Not last Monday. FABO Gold Member

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                  That's typical when you don't mash the seal down enough before hand and you don't cut enough off the ends. I always used a razor blade and cut flush with the block and the cap. I also smooth on a light layer of motor oil on both the block side and cap side of the seal and put a dab of RTV on the cut ends to assure a good seal.

                  Rope seals work, but they can be a pita and they can leak easier than a rubber seal, because they are finniky to get right. The rubber seals are light years ahead and much easier to install. Until fairly recently though, the rope seals were all you could get for some GM V8 engines, like Pontiac, for example.
                   
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                  • RustyRatRod

                    RustyRatRod I was born on a Monday. Not last Monday. FABO Gold Member

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                    I agree 100% with that assessment. I think speed and ease of assembly was probably the reason for the changeover. But rope seals do leak more often, since they are harder to get right. Once right though, they work well....and yes, you hit the nail on the head about the asbestos being gone. That's big brother trying to take care of us again. That was really good stuff that served a very needed purpose. I don't think there's anything else on the market that could stand up to heat like it could.
                     
                  • KosmicKuda

                    KosmicKuda FABO Gold Member FABO Gold Member

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                    IIRC, Doug Dutra has a very nice detailed write write up in his Slant Six book.

                    The book came out after I had rebuilt my 225. Having said that, I'd use a neoprene anyway.

                    Also less drag so you gain a little HP.
                     
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                    • bcschief

                      bcschief Well-Known Member

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                      Rope seal materials have changed thru the years I believe the original ones were asbestos which are no longer made but I read an article about 10 years ago that touted a graphite impregnated material. but I don't remember the source.
                       
                    • RustyRatRod

                      RustyRatRod I was born on a Monday. Not last Monday. FABO Gold Member

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                      You said impregnated. ahhh hahaha ahhh hehhehheh
                       
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                      • eekvonzipper

                        eekvonzipper My Member is Legendary! FABO Gold Member

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                        The Rope is "In Tha Trash" Triple R!
                        The Newer Style Seal was No Problemo.
                         
                      • 68 HEMI GTS

                        68 HEMI GTS Well-Known Member

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                        Why bother. Modern seals work much better. I did this for a living, I wouldn’t put a rope seal in an engine if you paid me extra.. and I have been taught how to install them. Makes no sense with modern technology
                         
                        Last edited: May 15, 2022
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                        • Bewy

                          Bewy Well-Known Member

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                          Rope seal= model T
                          One piece silicon seal= space age
                           
                        • eekvonzipper

                          eekvonzipper My Member is Legendary! FABO Gold Member

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                          Alright, Enough. I just didn't know!
                          I thought "Early Barracuda" old skool stuff.
                          Never occurred to me that a modern seal would work in that early 273, but I'm Really glad it does!
                          Goin' together tomorrow...
                          Thanks to Everyone!

                          1.jpg
                           
                          Last edited: May 15, 2022
                        • Bakerlite

                          Bakerlite Well-Known Member

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                          JW1.jpg
                           
                          Last edited: May 15, 2022
                        • Daves69

                          Daves69 Well-Known Member

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                        • dogbreath

                          dogbreath Well-Known Member

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                          And if you do , then use the newer viton double lip seal.
                           
                        • Mike69cuda

                          Mike69cuda 66 is the new 17 FABO Gold Member

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                          Definitely get the best seal. I was told by someone on here to trim it. That didn’t work. I called the manufacturer & they told me to install it as it comes. That worked out well, but took me two tries due to bad advice.
                           
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