LS Oil Barbell: Why is it a big deal?

Grassroots Motorsports
Grassroots Motorsports
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Published 2020-05-14
The rear galley plug (commonly known as the "barbell" or "dog-bone") is an important part of the oil system in LS engines and replacing the stock part with an upgraded one is a good idea anytime you have the rear cover off your engine.

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All Comments (21)
  • @wheelitzr2
    The factory one is designed to keep oil pressure up on the bearings even if the filter starts to get plugged.
  • @codyzellner
    Spends 5 mins trying to sell barbell, reason? "It can mess up oil pressures and stuff" Thanks for that technical breakdown.
  • @MrFlynryan
    Do not use a metal barbell that has a second o-ring. The oil galleys that go from the filter up to this main galley has sharp ridges where they intersect. If you use a barbell with a second o-ring, it will catch on those edges and tear. The broken pieces will go through your engine and oil will leak past the barbell. The ones that do not have a 2nd o-ring have a very tight tolerance to the oil galley. Nothing over 20 microns is getting past it.
  • @rotsbelramos7685
    What happenes if I lost pressure due to changing the rear main seal can I change it out still because it's still leaking
  • @powellmachineinc3179
    You don't "lose oil pressure " if you leave it out from "backpressure " from going through the filter (if you did have "back pressure" in you filter you would need a lot more than the oil diverter)...... you lose oil pressure from the passage going straight to the back cover as nd dumping in the oil pan, ..... second we build tons of high hp ls engines, turbo,blower, nitrous ect, hot oil, big pressure ect, us nor any customer that I have ever talked to or heard of has had a plastic one fail.
  • @datasailor8132
    Knew that piece existed, but didn’t know what it did. TNX
  • @needadate
    The smallblock chevy has a similar feature for the same reason, a metal plug inserted in the oil channel. Like the LS barbell, not having it in place - or broken/leaking - does not affect your oil pressure but it WILL destroy your engine since it effectively bypasses the oil filter.
  • @mrhighway
    The OEM one never fail waste of money
  • @johnwilleford7715
    I want to see where the dog bone goes. How do you get to it? Take it out and put it in? You holding one in your hand and pointing out oil galilerys doesn't tell me enough.
  • @user-zc6dn9ms2l
    I like the seal at both end . More engine block friendly . And seal cold and hot . But you can add a seal missing on the original one . Assuming the plastic one is not press fitted . If the original one as a tight fit ? It's a non issue
  • @Hitman-ds1ei
    Pity they don't include silicon o ring upgrade too, I use caterpillar yellow ones.
  • @champspec
    I hit the button as hard as i possibly can, but now my monitor is sitting on the floor, pink and green and i cant see anything on it anymore
  • @t.s.racing
    Viton or Nitrile. I hope that helps. T.S. RACING
  • @endurovex7272
    plastic works fine/ In all the years of this engine the plastic has never failed
  • @wendellgreenidge3362
    How can you lose oil pressure from not having the barbell in? What back pressure from the oil filter you are talking about? None of that makes sense