Register now to get rid of these ads!

Technical Found this in the oil galley

Discussion in 'The Hokey Ass Message Board' started by Fabulous50's, May 25, 2021.

  1. Fabulous50's
    Joined: Nov 18, 2017
    Posts: 513

    Fabulous50's
    Member
    from Maine

    So now you guys have me wondering.

    The jiggle pin, or better stated check valve, lets air/oil out but does not let it back in during shutdown. It is the highest point in the oiling system.

    If I simply drill a hole it will let air in and oil will drain out of pretty much to the lowest point. Longer time during startups before oil is supplied to bearings.

    If I simply plug it off completely there is a question about oil to the timing chain.

    Remember my background us in OT German cars, all have overhead cam(s). So I'm not as familiar with timing chains orphaned by themselves in front of the block.

    How does GM and Mopar oil the front chains? I know the FE is famous for oiling issues and I've drilled a drain back hole in the valley, as well as drilling the oil pump to filter housing passage to 7/16 and chamfered several passages to line up better.

    I just as much oil to get through the convoluted passages around the cam bearings and make it the the mains as fast as possible on startup.

    I'm now questioning if I'd be better off making my own jiggle pin for that main plug.
     
    Center of the Galaxie likes this.
  2. Boneyard51
    Joined: Dec 10, 2017
    Posts: 6,440

    Boneyard51
    Member

    You can leave it out or put it back in, either way. But if you decided to plug it, drill the little hole in the plug. Simple. The original jiggle pin would let air back in the galley! But air can also enter the oil system at the lifters, rods mains and other places.








    Bones
     
    Center of the Galaxie likes this.
  3. Elcohaulic
    Joined: Dec 27, 2017
    Posts: 2,212

    Elcohaulic

    I would think twice about using that big roller timing chain. They get real sloppy after a few thousand miles. Best to use the Morse type chain. They keep better timing..
     
  4. Pontiac V8's are commonly modified with a hole drilled in the oil gallery plug for timing chain lube. Some super duty engines came with the hole from the factory as I understand it (I am no Pontiac expert) but it is recommended by many engine rebuilders. I don't think this will cause you bearing or lifter problems, I will attach a picture of the Pontiac mod. unnamed.jpg
     
    Fabulous50's and Joe Travers like this.
  5. 56sedandelivery
    Joined: Nov 21, 2006
    Posts: 6,695

    56sedandelivery
    Member Emeritus

    ^^^"Pontiac mod" on a SBC roller block.^^^ Course they had become "corporate motors" by this time in history. I wonder how Ford arrived at the name Jiggle pin? I am Butch/56sedandelivery.
     
    Fabulous50's likes this.
  6. Yeah, grabbed the photo off the interweb and it said "pontiac" , I didn't pay much attention cause it was the hole in the gallery plug I was talking about. Everything I have done in the past has been Ford or Chryslers, never any GM stuff. That engine could be a Messerschmidt for all I know!
     
    Fabulous50's likes this.
  7. I have one better. I bought a '52 331 hemi in a basket from a classmate in high school in about 1964. When I was tearing it apart to check for damage and wear I pulled the plugs out of the 4 rocker arm shafts. They wer jam-packed full uf pure white silica sand! I was a teen and this was my first engine so I thought the sand might be some sort of speed secret. The parts were to spec, no wear, and the oil pump was like new. To this day I can't figure out what that was all about. I cleaned the parts and have been running them for 50 or so years. Anyone ever hear of something like this?
     
    seb fontana and Fabulous50's like this.
  8. Joe Travers
    Joined: Mar 21, 2021
    Posts: 708

    Joe Travers
    Member
    from Louisiana

    Do not know the answer to that one. I haven't run across one in the three FEs I've owned, '65 352, '66 390, '76 360. It serves two purposes, burp air, oil chain. Looks like you're installing upgraded parts that may or may not need it. The oil passages aren't going to change. That's a given.

    Joe
     
    Last edited: Jun 2, 2021
    Fabulous50's likes this.
  9. Fabulous50's
    Joined: Nov 18, 2017
    Posts: 513

    Fabulous50's
    Member
    from Maine

    So none of the FEs you've pulled apart have a different plug in that oil galley plug? All just have a regular plug in the end?

    The link belt chain or silent chain as they are sometimes referred to was quite sloppy with less that 10,00p miles on it. I was told by my local engine machinist that link belts are known to get sloppy quickly. That a roller chain, like what a modern LS uses will last much longer. I know it was 3x the price of an OE style link belt. Both made by Cloyes.
     
  10. DDDenny
    Joined: Feb 6, 2015
    Posts: 19,132

    DDDenny
    Member
    from oregon

    The Cloyes timing sets of old are not what they are selling today, some of their product line comes from "overseas", a sign of the times.
     
    Fabulous50's likes this.
  11. Joe Travers
    Joined: Mar 21, 2021
    Posts: 708

    Joe Travers
    Member
    from Louisiana

    None that I can remember. The '65 was a truck engine with a cam thrust plate. Not much help on upgrading cam and timing chain here, seeing you are using the later set-up. They are different. Hope your machinist is up on the changes. Not many are.

    Joe
     
    Fabulous50's likes this.
  12. birdman1
    Joined: Dec 6, 2012
    Posts: 1,591

    birdman1
    Member

    Ford heavy duty truck engine used roller chain from the factory
     
    seb fontana and Fabulous50's like this.
  13. Ebbsspeed
    Joined: Nov 11, 2005
    Posts: 6,250

    Ebbsspeed
    ALLIANCE MEMBER

    "Jiggle pin" was probably some body part nickname created by the wife of an FE designer, and he carried the phrase forward to the drafting table.
     
    Fabulous50's likes this.
  14. ronzmtrwrx
    Joined: Sep 9, 2008
    Posts: 1,137

    ronzmtrwrx
    Member

    And to think all these years I’ve been calling it the oil galley. I thought a gallery was either where you shot your pistol or looked at weird art. :D Not according to the Ford service manual.
     
    nosford, Truck64 and Fabulous50's like this.
  15. Fabulous50's
    Joined: Nov 18, 2017
    Posts: 513

    Fabulous50's
    Member
    from Maine

    I paid the price for American Made, and that is what I recieved. I believe their cheaper stuff may be off shore. The billet steel stuff is made here. I actually emailed them before I bought it. I an generally very inquisitive about things like that.
     
    nosford likes this.
  16. Jacksmith
    Joined: Sep 24, 2009
    Posts: 1,564

    Jacksmith
    ALLIANCE MEMBER
    from Aridzona

    If that's a "jiggle-pin", what's holding the "wobble-shaft" in? I think you should check the block for a bullet hole...
     
  17. Oneball
    Joined: Jul 30, 2023
    Posts: 606

    Oneball
    Member

    Is there a consensus on what to do with this plug with the jiggle pin? Do I need a hole here?
    I’ve got one in mine, I was going to leave it but the oilways are so filthy I really ought to pull it to clean

    IMG_6128.jpeg
     
  18. Johnboy34
    Joined: Jul 12, 2011
    Posts: 1,588

    Johnboy34
    Member
    from Seattle,Wa

  19. bchctybob
    Joined: Sep 18, 2011
    Posts: 5,190

    bchctybob
    Member

    This is interesting. Does anyone have a photo of a good jiggle-pin and how it goes into the passage?

    The whole thing reminds me of the big cotter pin in the bottom of the clutch cover on my buddy’s flathead. ???
     
    seb fontana likes this.

Share This Page

Register now to get rid of these ads!

Archive

Copyright © 1995-2021 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. Terms of Service. Privacy Policy.

Atomic Industry
Forum software by XenForo™ ©2010-2014 XenForo Ltd.