Cam plate oil hole for timing chain?

Small Block Mopar Engine

  1. QuickDart360

    QuickDart360 Well-Known Member

    Messages:
    1,173
    Likes Received:
    417
    Joined:
    Apr 5, 2014
    Location:
    San Antonio
    Local Time:
    7:21 AM
    Ok folks have a little confusion. I am about to install cam thrust retaining plate. Some members here habe suggested to leave passenger side upper bolt out to lube chain. However, I have a chrysler manual where it shows when smallblocks came with drilled bolt to put it on drivers side. So is there a reason to do opposite side instead.:eek:
     
    • Like Like x 1
    • krazykuda

      krazykuda Well-Known Member FABO Gold Member How-To Section Editor

      Messages:
      53,536
      Likes Received:
      18505
      Joined:
      Aug 20, 2007
      Location:
      Orland Park, IL
      Local Time:
      7:21 AM
      You can either leave that bolt out, or use the bolt with the hole...

      As long as the hole is open and able to let oil get to the timing chain...


      If you have the drip tab for oiling, it requires leaving the bottom driver's side bolt out for the locating tab... I would not recommend not having the other bolt left out, but use the bolt with the hole in it as I wouldn't trust only 2 bolts to hold the camshaft thrust plate...
       
      • Agree Agree x 2
      • toolmanmike

        toolmanmike FABO MODERATOR Staff Member FABO Gold Member

        Messages:
        50,300
        Likes Received:
        35258
        Joined:
        Jan 18, 2006
        Location:
        Iowa
        Local Time:
        7:21 AM
        My 273 didn't have a drilled bolt but I drilled the plate and a tiny hole in the oil galley plug. You can see it in the upper left.

        042500951507[00].jpg
         
        • Like Like x 1
        • Thanks! Thanks! x 1
        • Agree Agree x 1
        • toolmanmike

          toolmanmike FABO MODERATOR Staff Member FABO Gold Member

          Messages:
          50,300
          Likes Received:
          35258
          Joined:
          Jan 18, 2006
          Location:
          Iowa
          Local Time:
          7:21 AM
          I read it in a small block hot rodding book. I bet that thing really squirts at 50#. lol
           
          • Like Like x 3
          • Agree Agree x 1
          • QuickDart360

            QuickDart360 Well-Known Member

            Messages:
            1,173
            Likes Received:
            417
            Joined:
            Apr 5, 2014
            Location:
            San Antonio
            Local Time:
            7:21 AM
            Ok but is the bolt with the hole on driver's side as manual says? Right side bot hole is closer to dripper tip as I observe it.
             
          • RustyRatRod

            RustyRatRod Bla de blizhibliz de blatde blizi bla bla FABO Gold Member

            Messages:
            61,610
            Likes Received:
            33561
            Joined:
            Jun 7, 2010
            Location:
            Georgia
            Local Time:
            8:21 AM
            Heck yeah I bet it does too! lol
             
          • toolmanmike

            toolmanmike FABO MODERATOR Staff Member FABO Gold Member

            Messages:
            50,300
            Likes Received:
            35258
            Joined:
            Jan 18, 2006
            Location:
            Iowa
            Local Time:
            7:21 AM
            No leaks from the front cover or seal.
             
          • RustyRatRod

            RustyRatRod Bla de blizhibliz de blatde blizi bla bla FABO Gold Member

            Messages:
            61,610
            Likes Received:
            33561
            Joined:
            Jun 7, 2010
            Location:
            Georgia
            Local Time:
            8:21 AM
            Naw it would just fall into the oil pan. After splatterin all over everything. lol
             
            • Agree Agree x 1
            • krazykuda

              krazykuda Well-Known Member FABO Gold Member How-To Section Editor

              Messages:
              53,536
              Likes Received:
              18505
              Joined:
              Aug 20, 2007
              Location:
              Orland Park, IL
              Local Time:
              7:21 AM

              Read this article that I authored.... It explains it...

              How to Assemble the Front of a Small Block
               
              • Like Like x 2
              • Thanks! Thanks! x 1
              • QuickDart360

                QuickDart360 Well-Known Member

                Messages:
                1,173
                Likes Received:
                417
                Joined:
                Apr 5, 2014
                Location:
                San Antonio
                Local Time:
                7:21 AM
                It confused me because the manual I have is an original manual from chrysler! It is red white and blue in color on front cover and is for 1975 chrysler chassis/engine. It shows a clear pic of bolt with hole on drivers side. However, I see how it makes more sense to put bolt with hole on left (looking @ motor from front side.) Since oil will come down to oil slinger tab as a direct or more direct shot than other side.
                 
                • Like Like x 1
                • yellow rose

                  yellow rose Walking the crooked mile

                  Messages:
                  22,904
                  Likes Received:
                  18891
                  Joined:
                  Jun 19, 2015
                  Location:
                  Living on the razors edge
                  Local Time:
                  5:21 AM
                  Leave the bolt with the hole in it on the bench. You can drill a small hole in the plate on either side. That bolt is worthless.

                  If you want to be really cool, you can tap the plate and screw a .032ish air bleed in there. I know people don't really like drilling holes smaller that .125 and that's just too big. That's how I do my stuff. I screw an air bleed into the plate from the gallery side.
                   
                  • Thanks! Thanks! x 1
                  • barracudadave67

                    barracudadave67 FABO Gold Member FABO Gold Member

                    Messages:
                    1,174
                    Likes Received:
                    483
                    Joined:
                    May 22, 2004
                    Location:
                    Burlington, Wi.
                    Local Time:
                    7:21 AM
                    If you don't have a bolt with a hole in it, you can drill one thru, if you have a drill press, and a drill press vice. Just center punch the center of the bolt head, and drill it out with a 1/8th in, or smaller drill bit. Oil the bit as you drill. Then deburr the holes.
                    I just drilled one yesterday. Came out great. Easy peasey.
                    Install your newly drilled bolt in the upper left bolt hole, on the front (pass side) of your engine.
                    Dave
                     
                    • Thanks! Thanks! x 1
                    • Agree Agree x 1
                    • dartfreak75

                      dartfreak75 Restore it, Dont part it! FABO Gold Member

                      Messages:
                      7,516
                      Likes Received:
                      5267
                      Joined:
                      Aug 10, 2011
                      Location:
                      Virginia
                      Local Time:
                      8:21 AM
                      I have the thrust plate with the tab on it I thought I had lost the 4th bolt and looked even for it just to realize that the "4th" hole was for the tab and didnt have a bolt in it. Lol
                      I like tmm oil plug hole that seems like it would be the most effective and easiest. Bolts can be a right pain to drill thru and I'm with krazykuda I dont trust just two bolts. I think I will do the oil plug hole!!
                      Just curious does the factory original system not provide enough oil to the timing chain? Is that the purpose for this? Or is it just a more is better type deal?
                       
                    • rumblefish360

                      rumblefish360 So close, yet so far away FABO Gold Member

                      Messages:
                      38,266
                      Likes Received:
                      9926
                      Joined:
                      Jun 21, 2005
                      Location:
                      New York, on a Island
                      Local Time:
                      8:21 AM
                      More is better. That’s the idea behind it. It’s a nice and helpful easy mod I can help in very high performance engines.
                       
                      • Thanks! Thanks! x 1
                      • dartfreak75

                        dartfreak75 Restore it, Dont part it! FABO Gold Member

                        Messages:
                        7,516
                        Likes Received:
                        5267
                        Joined:
                        Aug 10, 2011
                        Location:
                        Virginia
                        Local Time:
                        8:21 AM
                        Not building what most would consider high performance but wth I may as well do it while its apart. I have an el cheapo timing chain maybe the extra oil will hold it together.
                         
                      • krazykuda

                        krazykuda Well-Known Member FABO Gold Member How-To Section Editor

                        Messages:
                        53,536
                        Likes Received:
                        18505
                        Joined:
                        Aug 20, 2007
                        Location:
                        Orland Park, IL
                        Local Time:
                        7:21 AM
                        You need to get oil to the chain through that bolt hole or by TMM's method to drill a small hole in the galley plug... Keep in mind that the cup plug hole has PRESSURIZED oil feed and the "factory" bolt hole is just drain and no pressure...

                        Once you get oil in the front of the engine from either hole, then the oil slinger can sling it over the chain to lube it...
                         
                        Last edited: Apr 13, 2019
                        • Like Like x 1
                        • 69FBCuda

                          69FBCuda Life in the Fast Lane FABO Gold Member

                          Messages:
                          2,577
                          Likes Received:
                          1368
                          Joined:
                          Aug 28, 2014
                          Location:
                          Florida
                          Local Time:
                          8:21 AM
                          I can't see where a pin hole in a non pressurized bolt would flow a lot of oil. I left the upper passenger side bolt out since I didn't have a dripper. If you want to go the dripper route I'm sure and A bodied bud would have one to sell!

                          upload_2019-4-13_9-11-42.jpeg
                           
                          • Like Like x 2
                          • Agree Agree x 1
                          • krazykuda

                            krazykuda Well-Known Member FABO Gold Member How-To Section Editor

                            Messages:
                            53,536
                            Likes Received:
                            18505
                            Joined:
                            Aug 20, 2007
                            Location:
                            Orland Park, IL
                            Local Time:
                            7:21 AM
                            You can get the drip tab in this comp cams block hardware package sold through Mancini Racing:

                            Competition Cams Engine Finishing Kit
                             
                            • Thanks! Thanks! x 2
                            • Like Like x 1
                            • Agree Agree x 1
                            • dartfreak75

                              dartfreak75 Restore it, Dont part it! FABO Gold Member

                              Messages:
                              7,516
                              Likes Received:
                              5267
                              Joined:
                              Aug 10, 2011
                              Location:
                              Virginia
                              Local Time:
                              8:21 AM
                              That's a good deal that's worth buying just for the cam key.
                               
                              • Agree Agree x 3
                              • Like Like x 1
                              • Wyrmrider

                                Wyrmrider FABO Gold Member FABO Gold Member

                                Messages:
                                3,466
                                Likes Received:
                                1658
                                Joined:
                                Sep 5, 2016
                                Location:
                                los angeles
                                Local Time:
                                5:21 AM
                                a hole into the oil galley- a small hole- also bleeds foam and trapped air bubbles
                                nothing wrong with the drain hole either as an addition
                                 
                                • Like Like x 1
                                • Krooser

                                  Krooser Reform School Graduate

                                  Messages:
                                  2,426
                                  Likes Received:
                                  1942
                                  Joined:
                                  Jul 19, 2015
                                  Location:
                                  Central Wisconsin
                                  Local Time:
                                  7:21 AM
                                  • Thanks! Thanks! x 2
                                  • Like Like x 1
                                  • dartfreak75

                                    dartfreak75 Restore it, Dont part it! FABO Gold Member

                                    Messages:
                                    7,516
                                    Likes Received:
                                    5267
                                    Joined:
                                    Aug 10, 2011
                                    Location:
                                    Virginia
                                    Local Time:
                                    8:21 AM
                                    • Like Like x 1
                                    • Krooser

                                      Krooser Reform School Graduate

                                      Messages:
                                      2,426
                                      Likes Received:
                                      1942
                                      Joined:
                                      Jul 19, 2015
                                      Location:
                                      Central Wisconsin
                                      Local Time:
                                      7:21 AM
                                      I was on one of my hang outs a few days ago and the discussion was about timing chains. I may have seen something like this here, too.

                                      Anywho... the discussion was double row vs. single row timing chains. There were several guys in the business who install single row timing chains on competition engines ie. drag and oval track stuff that is routinely rebuilt. The concensus was single row is fine... but double row sells. The single row seens to require a bit less power to spin it, too.

                                      Looking back almost 60 years I never installed a double row timing chain in any engine until I did my blown Hemi back around 2005. They were not available for most of that time. And I did a bunch of engines of different flavors... SBC, SBF, FE Fords, 351-C Fords, Olds, Pontiac, Buick and Mopar.

                                      Has anyone ever seen a single row chain with iron sprockets fail? I mean in under 7-8,000 rpm applications...

                                      Right now a $29.00 single row chain with cast sprockets seems to be pretty enticing.
                                       
                                    1. This site uses cookies to help personalize content, tailor your experience and to keep you logged in if you register.
                                      By continuing to use this site, you are consenting to our use of cookies.