Oil Galley plugs at Camshaft

Small Block Mopar Engine

  1. Ivoryk3ys78

    Ivoryk3ys78 Well-Known Member

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    Good evening everyone.

    We have started putting together my 408 stroker and the block has nice plugs threaded into the two galley plug holes that go behind the timing chain tensioner. Those holes are covered on the timing chain tensioner. So I am wondering should we take them out of the block or open them up on the timing chain tensioner?

    On the 318 that we took out of the Duster those holes are not even machined with threads and so the plate just covered them.

    Thanks a lot
     
  2. Krooser

    Krooser Building Chinese Free Engines since 1959...

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    I'd keep them. Low oil pressure is a constant issue with the SBM and keeping leaks out of in the oiling system is always a good idea.
     
  3. Ivoryk3ys78

    Ivoryk3ys78 Well-Known Member

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    Okay so just punch or drill the holes out of the timing chain tensioner then.

    Thank you
     
  4. Krooser

    Krooser Building Chinese Free Engines since 1959...

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    No access holes in the cam sprocket? Wait...covered by the tensioner?
     
  5. dodgy

    dodgy Well-Known Member

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    You'll have to do some checking on that block to see what the previous builder has done with it , are the plugs only shallow as not to cover the oil holes to the mains.
     
  6. Wyrmrider

    Wyrmrider Well-Known Member

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    I drill small holes in them to bleed foam and air and to lube the chain
    holes through the cover too
    want more oil to the rods block the feeds for the heads and feed from the back of the block
    lots of other oiling tricks- see the stickie
     
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    • Ivoryk3ys78

      Ivoryk3ys78 Well-Known Member

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      I am saying that these two pipe plugs that are in the block surrounding the camshaft can not poke through the timing chain tensioner. On the plate those holes are not opened up. I assume to cover it up on all blocks because some are not threaded. My 318 the block is not even threaded on those holes.

      20200104_135453.jpg
       
    • Ivoryk3ys78

      Ivoryk3ys78 Well-Known Member

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      So I just want to know if it is best to leave those pipe plugs in and open up holes in the timing chain tensioner plate or to take the plugs out and let them be plugged by the timing chain tensioner plate. I am not sure what people normally do. On the 318 there is not even threads in the block so they would have had to have been just covered.

      Thanks.
       
    • Cudafever

      Cudafever Well-Known Member

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      They must b flush
       
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      • Ivoryk3ys78

        Ivoryk3ys78 Well-Known Member

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        So those pipe plugs that the machine shop put in are not right?

        I have a picture posted above and you can see they are far from flush.
         
        Last edited: Jan 4, 2020
      • Wyrmrider

        Wyrmrider Well-Known Member

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        right
        wrong plugs
        the right plugs are short
         
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        • 70aarcuda

          70aarcuda Master Hoader of SBM FABO Gold Member

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          If you buy a freeze plug kit...those plugs are included in the kit...they are not threaded...they are tapped in...watch the driver side as there is a oil passage there that you do not want to block....with the plug flush with the block the cam retainer or tensioner bolts on...
           
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          • Ivoryk3ys78

            Ivoryk3ys78 Well-Known Member

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            Oh okay. Yea it was confusing. We went and looked at the 318 and it was not threaded but those looked like threaded plugs they have in there. Will have to get them out.

            On the 318 there was nothing in the holes at all and we had no issues with that block. Is there any consensus as to if those should have plugs in them?

            Thank you.
             
          • toolmanmike

            toolmanmike Moderator Staff Member FABO Gold Member

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            There shouldn't be threaded plugs. There are Welch plugs in those passages. (soft plugs) if yours are threaded I doubt that you can go back to soft plugs. The threaded plugs need to be flush or less. Let us know what you find that works. Who did this and why??
             
          • Ivoryk3ys78

            Ivoryk3ys78 Well-Known Member

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            We had boring and line honing and rotating assembly balancing etc done at a machine shop in Oregon City. They from what I understand deal with performance engines though I do not believe specialize in mopar blocks. I did provide a soft plug kit when we brought everything in to be worked on.

            I am not sure what the thinking would have been on this.
             
          • Krooser

            Krooser Building Chinese Free Engines since 1959...

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            Some engines came from the factory without the plugs. A mistake? Maybe... or laziness.

            The small block tends to have some oiling issues at higher rpm but that's not where most guys runs their cars. I guess it's at 6500+ on the tach. If you run those speeds you need to be aware that any "leaks" in the internal oiling system may lead to a spun rod bearing.Too much lifter bore clearance, loose bearing clearances, a loose or missing pipe plug, leaky cover on the oil pump... (there are more!) Any and all can give trouble.

            My advice is to eliminate any and all potential leaks even with a daily driver. Doesn't really cost anything and it's peace of mind if nothing else.
             
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            • yellow rose

              yellow rose Overnight Sensation

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              Who was the brain surgeon who did that.

              Take the pipe plugs out and throw them in the drawer for something else.

              Don't bother with the soft plugs either.

              Bolt the cam plate or tensioner on there and forget the oil gallery is even there. You don't need to plug that off and tapping those holes is beyond idiotic.
               
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              • 70aarcuda

                70aarcuda Master Hoader of SBM FABO Gold Member

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                Need thread....Why do I have low oil pressure...lol

                why chance it...put them it...
                 
              • yellow rose

                yellow rose Overnight Sensation

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                I have never used a plug in those places and never will. Unless the block is junk or the cam reasoning plate is garbage there won't be a lack there.

                Jesus guys make shit hard.
                 
              • RustyRatRod

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

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                For what purpose?
                 
              • Ivoryk3ys78

                Ivoryk3ys78 Well-Known Member

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                The purpose would have been so that the threaded pipe plugs that are not flush with the block could have had room.
                 
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                • RustyRatRod

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

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                  Mike, I've torn down factory engines with short pipe plugs there. Admittedly, most have had the small freeze plugs.

                  To the @Ivoryk3ys78 if you want oil to the timing chain area, here's what you do. Look at the engine from the front. The upper passenger's side cam thrust plate/chain tensioner hole goes through to the bottom of the intake valley. The bolt that goes in that hole needs to be drill right through the center all the way through with an 1/8" bit. Then oil will drip onto the splash point on the tensioner, or the sheet metal point you bolt to the cam thrust plate.
                   
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                  • RustyRatRod

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

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                    Then call Chrysler idiots, because I see a lot of factory blocks with short pipe plugs there. Sometimes it's not about "makin stuff hard" it's about "puttin stuff back like you found it". Just because you haven't seen something, doesn't make it NOT so. You crusty old geezer. lol
                     
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                    • Ivoryk3ys78

                      Ivoryk3ys78 Well-Known Member

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                      Doesn't the timing chain get oiled from around the front of the camshaft and drip onto that tab from there?
                       
                    • RustyRatRod

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

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                      It's supposed to come from that hollow bolt. Most everybody throws the thing away. If you look in the How To section, @krazykuda Karl has a write up on it I believe. It's a factory modification. I don't know when they started doing it, but I've torn down lots that were factory engines with that mod done. No way would I put one together without it. To answer your question more directly, no, there is no "purposed" oiling of the timing chain without that. It just "gets what it gets". If you can improve upon that with one drilled hole, why not do it?
                       
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