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Technical oil plug in engine

Discussion in 'Traditional Hot Rods' started by Douglas Smith, May 11, 2023.

  1. Douglas Smith
    Joined: Nov 26, 2022
    Posts: 31

    Douglas Smith
    Member

    In a typical 50s OHV V8 (Caddy, olds etc) if the oil galley plug in the distributor well is not installed would the engine have any oil pressure; a little if cold, none at all cold or hot?
     
  2. Kevin Ardinger
    Joined: Aug 31, 2019
    Posts: 1,043

    Kevin Ardinger
    Member

    Guess it depends on how big the hole is.
     
  3. vtwhead
    Joined: Oct 20, 2008
    Posts: 5,298

    vtwhead
    Member

    Doug, I suspect that it would reduce or eliminate pressure. This will bump it to the top for ya....
     
  4. Budget36
    Joined: Nov 29, 2014
    Posts: 15,251

    Budget36
    Member

    You should edit and change your****le. Start off (I’m****uming) “50’s OHV Cad engine no/low oil pressure”.
    Certainly you’re not thinking ahead about wanting to leave something out of an engine that the engineers designed into it.
     
  5. Really hard to give a good answer to this question as there are many variables. Size of the hole, engine design, oil pump condition, engine rpm, and distance of hole to the oil pump among many. A good example is Buick Nailhead. Leaving that plug out results in no if any pressure.
     
  6. vtwhead
    Joined: Oct 20, 2008
    Posts: 5,298

    vtwhead
    Member

    post from Tony at Ross Racing in 2018:
    [/QUOTE]That's the screw-in hex plug with a jet hole, aimed at the timing chain. If that is left out, it would be a huge internal oil pressure loss.[/QUOTE]
    Everybody remembers the 2 plugs in the front of the engine behind the timing gear......it's the one that needs installation inside, behind the small soft plug, in the back of the block , that everybody forgets.
    It's at the end of the lifter bank in line with the distributor and also weeps a little oil on the gear
    I get 1-2 calls a wk about this one

    Tony
    And a post from Gonzo with pics
    [​IMG]



    [​IMG]
     
  7. hemihotrod66
    Joined: May 5, 2019
    Posts: 968

    hemihotrod66
    Member

    My early hemi as an internal pipe plug in the oil galley to....The old racers drilled a .050 hole in it to oil the brass distributor gear that is used on roller cams....Did that on mine and the brass gear shows no wear after 7 thousand miles.....
     
    Desoto291Hemi and seb fontana like this.

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