Oil filter plate leaks?

Small Block Mopar Engine

  1. Cope

    Cope Fusing with fire

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    I'm chasing a bad leak on the filter adapter plate on my 360. Not using the 90 degree adapter just the plate.

    How have you folks solved this stupid plate to block leak? I tried cork, rubber and the factory gasket all of them leak. I dont wanna use right stuff as it will be a major bitch to clean off if I ever need to remove it but i will if that's what it takes?

    Also with just the plate do i use the small gasket around the part the filter threads on to under the plate?

    Thanks for the time and advice.
     
  2. brian6pac

    brian6pac Well-Known Member

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    Clean all the gaskets off of it and put the plate on the block without gaskets, how does it fit ? is there a bigger gap on the outside or the inside of the plate? or does it fit perfect, are the gaskets the same thickness?
     
  3. Cope

    Cope Fusing with fire

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    The plate fits nice. Not sure what you mean by out side and inside?
     
  4. brian6pac

    brian6pac Well-Known Member

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    There is a gasket around the outside and a gasket around the fitting that holds it to the block
     
  5. dusted

    dusted FABO Gold Member FABO Gold Member

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    My 2001 V6 Ram did the same thing. I finally used some ultra grey on the gaskets and all was good after that.
     
  6. 408 swinger

    408 swinger FABO Gold Member FABO Gold Member

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    I only use the Fel-Pro gasket on this. It is thick and pretty rigid. With that said, I still use the MINIMAL amount of RTV. I can't remember the part# at the moment. Stay tuned.
     
  7. pishta

    pishta I know I'm right....

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    Many are warped. A chap is selling iron 90 adapters for $35 here, they dont leak there.
     
  8. Cope

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    The inside gasket goes under the plate correct?

    I'll pull the plate (again) in the morning put it on the flat steel table and check just how inline the two surfaces are.
     
  9. moper

    moper FABO Gold Member FABO Gold Member

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    Don't use any RTV on oil pressure stuff. The block has to be surgically clean and all remnants of the old (outer perimeter) gasket removed. No grease or oil on them. The plate has to be flat, no oil or grease, and no traces of the old gasket. Make sure any scraping scars are polished out if you beat it up... Use the inner gasket, plus the perimeter gasket, torque it well, and it shouldn't leak. RTV is asking for a problem IMO.
     
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    • 408 swinger

      408 swinger FABO Gold Member FABO Gold Member

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      Yes, larger dia. gasket between block and plate. I have taken many small blocks apart. Have not seen a gasket between oil filter thread and plate. Only seen gasket between bolt and adapter on the 90 degree deal.
       
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      • Max1196

        Max1196 Well-Known Member

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        Are you using a HV pump, Is there only 4 holes in the plate, Do not put a gasket around the inner center threaded stub or do not use that "3 spoked" provided Felpro gasket. With your application only the outer perimeter needs the gasket.
         
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        • pishta

          pishta I know I'm right....

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          you dont want inner and outer flanges on the same plane, the inside needs to be deeper. If it bottoms out before the outer does, youll have no clamping force on the gasket. you can seet hat with a straight edge across the boss. If they are parallel, tap it with a hammer to make it recessed a bit.
           
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          • diymirage

            diymirage HP@idle > hondaHP@redline

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            I'll just pipe up in case you do some digging and you find my previous posts on this...are you sure it is the oil filter plate?

            I chased my tail on this for months
            One day I decided to do a test to see where the oil was coming from and I taped a shoprag around my filter (figured if I could pinpoint the problem, maybe, just maybe I could fix it)
            Went for a spin and found oil on the OUTSIDE of my shoprag
            Some more testdrives with cardboard and rags in odd places led me to find a leaking rear main seal
            Oil would come out at the pan, travel back and hit the torque converter. The TQ would fling it up, it would land on the filter and "bam"...highest wet spot = spot of origen, right?

            My point is, are you SURE it is the filter plate?
             
          • rustycowll69

            rustycowll69 Well-Known Member

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            I thought they had two different plates with different offsets. I could be delusional.
             
          • Cope

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            It's the plate. New engine. I have no inner fenders and can watch it leak with an inspection mirror.
             
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            I think I have the small gasket under the plate. I will pull it apart in the AM and respond after work.

            Thank you!
             
          • rustycowll69

            rustycowll69 Well-Known Member

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            is it an LA or a Magnum engine?
             
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            Yup HV pump.
            HV pump

            Again THANKS!!

            if I can stop this leak, I owe ya one big time!
             
          • Cope

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            LA block
             
          • Cope

            Cope Fusing with fire

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            Ya know what started this? Dam thing leaked after I removed the the 90 degree adapter. Everything I tried wouldn't stop the leak. Went nextdoor to my engine builder and asked him why it leaks, he walks over with the one gasket and tells me replace the gasket you f*** up..... I guess he does know his sh!t....

            That's why I pay for engines to be built.....
             
          • mopardude318

            mopardude318 Well-Known Member

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          • pishta

            pishta I know I'm right....

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            someone said the magnums were flat and the LA's are not, cannot confirm but LAs dont get a gasket under the inner ring, only the outer and sometimes the gasket gets painted with the block so you think there is none and you add a second.
             
          • Cope

            Cope Fusing with fire

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            Pulled the filter and plate off and sure enough I had the little gasket around the center.... new gasket on just the outside and NO MORE LEAK!!

            THANK YOU SO MUCH!!!

            I dont even wanna say how long I've been chasing this leak....
             
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