Vintage 273/318 head gaskets

Mopar General Discussions

  1. Garrett Ellison

    Garrett Ellison Amateur driver on public roadway, do not imitate.. FABO Gold Member

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    image.jpg image.jpg image.jpg image.jpg image.jpg image.jpg image.jpg Just thought I’d let anyone that may be interested in on something I found in the eBay archives. Found in a search for NOS & Military surplus head gaskets.
    They have a 4.00 inch bore and look to be no more than .037 thick. A good option for someone who is looking for gaskets that won’t kill your compression.
     
    Last edited: Jan 14, 2022 at 12:59 PM
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    • pishta

      pishta I know I'm right....

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      link?
       
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      • Garrett Ellison

        Garrett Ellison Amateur driver on public roadway, do not imitate.. FABO Gold Member

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        Last edited: Jan 14, 2022 at 4:16 PM
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        • Garrett Ellison

          Garrett Ellison Amateur driver on public roadway, do not imitate.. FABO Gold Member

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          There are also some of the Steel shim Mopar big block gaskets and thin steel core 340 Victor Reinz head gaskets, too. Very possible to come across small block steel shim head gaskets there.
           
          Last edited: Jan 14, 2022 at 4:14 PM
        • pishta

          pishta I know I'm right....

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          Those field jacket liners are awesome. sleeves are a little short to wear it as is but we used to wear them under our long sleeve camy shirts and were toasty warm when we could not wear our field jackets. Marines stress uniformity, Its everyone wears a field jacket or no one does....The issue "wooley pullies" wool sweaters were great too, warm even when wet. $27 is a little steep though.
          s-l1600.jpg
           
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          • Garrett Ellison

            Garrett Ellison Amateur driver on public roadway, do not imitate.. FABO Gold Member

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            Pre compressed thickness measures out to .047 and the average bore size is 4.02.
             
          • bnichols

            bnichols Well-Known Member

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            They look familiar
             
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            • Garrett Ellison

              Garrett Ellison Amateur driver on public roadway, do not imitate.. FABO Gold Member

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              It's become an uphill battle to find thin gaskets that can be used as a standard service replacement (60 RA deck finish) for a 318 that don't have over a 4.1 inch bore. Sure, there are some MLS options from Mr. Gasket and SCE that are Viton coated and don't require an ultra smooth finish, but good luck finding any. There has been a large volume of MilSurp and NOS Chrysler/Mopar gaskets through different vendors on eBay lately, though. Thought it was worth sharing. These should be good for over 10:1 with iron heads and premium head bolts or studs.
               
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              • toolmanmike

                toolmanmike Moderator Staff Member FABO Gold Member

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                Read up. There's a lot of threads here about 273/teen head gaskets. Poke around for more information. I have a pair of 273 steel shim gaskets from a member here so I could measure bore size and thickness. If I can post that info I wil post it here.

                Source for 273 Head Gaskets??
                 
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                • George Jets

                  George Jets 1967 Dart 2 Door FABO Gold Member

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                  All Kinds of these Mr Gasket 1121G head gaskets for the 318s on ebay.

                  Smaller Bore and .028 compressed.

                  Screenshot_20220114-195520_Firefox.jpg
                  20220114_200418.jpg
                   
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                  • toolmanmike

                    toolmanmike Moderator Staff Member FABO Gold Member

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                    Thanks George. I surfaced the heads and deck and used those ony 273. 10 years and still going strong.
                     
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                    • George Jets

                      George Jets 1967 Dart 2 Door FABO Gold Member

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                      Supposed to be good to 11:1 c.r. too.
                       
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                      • Garrett Ellison

                        Garrett Ellison Amateur driver on public roadway, do not imitate.. FABO Gold Member

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                        I’ve recently used a Mopar Performance gasket that I believe is the Mr. Gasket pictured, just in Mopar packaging. It took a retorque to stop the coolant seepage, but still going strong on a heavy duty 360. I really like the fire rings on these NOS gaskets though. I’ve got a set of LA 318 4 barrel/360 iron heads that have been milled enough that the largest chamber diameter is around 3.98. I’m going to give these a whirl to see how they do in a 10.5:1 application.
                         
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                        • MOPAROFFICIAL

                          MOPAROFFICIAL FABO Gold Member FABO Gold Member

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                          Looks like the head gaskets you would see on van 318/360 from 80's.
                           
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                          • Garrett Ellison

                            Garrett Ellison Amateur driver on public roadway, do not imitate.. FABO Gold Member

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                            Correct again! These are superseded by a later part number that are essentially the same gasket. It shows up as a dodge M880 (1977-1980) 318/360 head gasket.
                             
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                            • George Jets

                              George Jets 1967 Dart 2 Door FABO Gold Member

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                              Good to have some different options for head gaskets in case supply dries up.
                               
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                              • George Jets

                                George Jets 1967 Dart 2 Door FABO Gold Member

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                                Here are the Mr Gasket 1121G head gaskets fitting up on a 360 application.

                                Screenshot_20210713-203352_Chrome.jpg
                                 
                              • RustyRatRod

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

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                                Those are not steel head gaskets. They are composition style. They are no different than say some of the Fel Pros or Mr Gasket stuff in terms of gasket thickness or material. They might be different as for bore size, which a lot of people would probably be interested in because those smaller bore gaskets are kinda hard to find. Maybe somebody should get with Cometic and see if they'd make a run of them. I bet they might.
                                 
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                                • RustyRatRod

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

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                                  Yeah, but those have a huge gasket bore size compared to the 4" bore gaskets Garrett linked to.
                                   
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                                  • RustyRatRod

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

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                                    I see the small bore size though as an advantage for the 318 and 273 guys. You cannot find them with that small a bore size now. Smallest I see off the shelf is like a 4.040 and that's an almost 100 buck a piece Cometic.
                                     
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                                    • Garrett Ellison

                                      Garrett Ellison Amateur driver on public roadway, do not imitate.. FABO Gold Member

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                                      Thanks Rusty! Yes, not a true steel MLS gasket but a graphite or asbestos core gasket (1968 manufacture date) with a stainless steel combination fire and sealing ring.
                                       
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                                      • George Jets

                                        George Jets 1967 Dart 2 Door FABO Gold Member

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                                        Screenshot_20220114-233608_Firefox.jpg
                                         
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                                        • MOPAROFFICIAL

                                          MOPAROFFICIAL FABO Gold Member FABO Gold Member

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                                          In case you didn't see it the 1st time...


                                          Come on George! Lol
                                           
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                                          • toolmanmike

                                            toolmanmike Moderator Staff Member FABO Gold Member

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