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Don't buy Chinese Turbos, eh? (Bastard threads)

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  • JRouche
    replied
    Originally posted by The Metal Butcher View Post

    Dad called me up today and said he needed a custom banjo bolt for a new turbo. M12x1. Seems rare, but ok. The old one was a pretty standard M12x1.25.Proprietary thread, or general incompetence? I think the latter.


    Turbo is a cheap, ebay "Turbo" brand turbo. Dad's choice. . Anyone placing bets on if the damn thing works at all or blows up in the first five minutes. lol

    Don't buy cheap ****!
    Bets? Heck yeah! Im betting on Dad. So Ill give you 4:1 odds your Dad wins. Deal All Day ..

    Cause you made a great fastener, I like it. Metal washers?

    Love the work and pics, aand the story. JR

    Leave a comment:


  • The Metal Butcher
    replied
    Originally posted by MattiJ View Post
    You could change the topic to ”don’t buy ’murican junk turbos” as Garret uses same ”bastard” thread
    Those bastards!

    Leave a comment:


  • nickel-city-fab
    replied
    Originally posted by MattiJ View Post
    You could change the topic to ”don’t buy ’murican junk turbos” as Garret uses same ”bastard” thread
    Maybe you can tell me why Liebherr uses Cat engines. But I think I'll just ignore you.

    Leave a comment:


  • MattiJ
    replied
    You could change the topic to ”don’t buy ’murican junk turbos” as Garret uses same ”bastard” thread

    Leave a comment:


  • The Metal Butcher
    replied
    Originally posted by psomero View Post

    1/20*25.4 = 1.27mm pitch .393 + 1/20 = .443 * 16 = 7

    It sounds like 7/16-20? Not hard to do the math
    Tried one. Started good, locked up. I think it's 7/16-24.

    Leave a comment:


  • Doozer
    replied
    Originally posted by psomero View Post

    1/20*25.4 = 1.27mm pitch .393 + 1/20 = .443 * 16 = 7

    It sounds like 7/16-20? Not hard to do the math
    Your math looks good to me.
    I cross check inch and metric that way
    when I don't know what something is.
    NF is what AN fittings use, yes ?

    -D

    Leave a comment:


  • psomero
    replied
    Originally posted by The Metal Butcher View Post

    Complete my knowledge then artful.

    Minor diameter: .393"/9.98mm
    Pitch, near 1mm, perhaps a bit longer.
    1/20*25.4 = 1.27mm pitch .393 + 1/20 = .443 * 16 = 7

    It sounds like 7/16-20? Not hard to do the math

    Leave a comment:


  • Doozer
    replied
    Not trying to be annoying, but I was thinking last night,
    Anything related to the oil system of an engine makes
    me want to make sure it is super reliable.
    If the oil line should leak, it could happen that the oil
    could be pumped out of the engine as you drive.
    This happened to my uncle. He installed an additional
    oil filter on his truck. It was a bypass filter and he had
    routed the oil return line to the valve cover, as per the
    instructions. Well it was a cheap die cast zinc fitting that
    attached the hose to however it got connected to the
    valve cover, and it failed. Somehow all the oil got pumped
    on the ground as he drove the truck. I guess it was his
    fault for not seeing the oil pressure gauge or lamp.
    So it cost him a Cummins engine rebuild. So just be
    careful.

    -Doozer

    Leave a comment:


  • Peter.
    replied
    Over here we have this wonderful site called Tracy Tools where you can get many sizes you never heard of off the shelf. Want a 5.5mm x 0.9mm pitch left hand tap - they got 'em.
    ​​​​​​
    They do 11mm taps in 1.0,1.25 1.5mm pitch.

    https://www.tracytools.com/taps-and-dies

    Leave a comment:


  • mattthemuppet
    replied
    Originally posted by The Metal Butcher View Post

    Sarge, damn that's genius! You guys are great! Thanks!
    if the hole is big enough, even a broken off piece of wood with a sharp edge is good enough to press against the threads. I had to do that to measure a chuck backplate thread as I didn't have a 10tpi gauge. I've even raided the kids playdoh before to do the same

    Leave a comment:


  • nickel-city-fab
    replied
    Originally posted by The Metal Butcher View Post
    If we had any hex steel, I'd have used that. We were too lazy to mill our own hex.
    that's what cheap Harbor Freight pry bars are for cheap source of hex steel stock.

    Leave a comment:


  • The Metal Butcher
    replied
    Originally posted by Doozer View Post
    For Dad's eye zoo zoo?
    Just a thought, looks like a thin cross section on that banjo bolt
    once you get all those holes in it. Yellow brass is pretty weak,
    maybe 80,000 psi aluminum bronze would give me more of a
    warm fuzzy feeling as for being strong enough. But if it works
    it works. But great job on the part.
    I ran into a 5/16"-20 thread the other week.
    Was on a Greenfield tap wrench that was OLD.
    I replaced the jumbled up slotted set screw
    with a M-8 x 1.25 hex Allen set screw.
    It fit perfect.

    -Doozer
    Yes, an Isuzu, but not the one you may be thinking of. That one is being parted out to fix one taken off the road 18 years ago for a rusty cab.

    I agree on the strength. We were looking at the 25ksi YS before making it. But, if it doesn't leak now, it shouldn't leak in the future. If we had any hex steel, I'd have used that. We were too lazy to mill our own hex.

    Leave a comment:


  • nickel-city-fab
    replied
    Probably the oddest tap size I have is 5/16-27. This is required as an industry standard for certain shotguns and accessories. Yup, found it on eBay brand new.

    Leave a comment:


  • Doozer
    replied
    For Dad's eye zoo zoo?
    Just a thought, looks like a thin cross section on that banjo bolt
    once you get all those holes in it. Yellow brass is pretty weak,
    maybe 80,000 psi aluminum bronze would give me more of a
    warm fuzzy feeling as for being strong enough. But if it works
    it works. But great job on the part.
    I ran into a 5/16"-20 thread the other week.
    Was on a Greenfield tap wrench that was OLD.
    I replaced the jumbled up slotted set screw
    with a M-8 x 1.25 hex Allen set screw.
    It fit perfect.

    -Doozer

    Leave a comment:


  • nickel-city-fab
    replied
    Originally posted by The Metal Butcher View Post
    Dad contacted the mfg today, and according to them it is M11x1. I'm not sure they are correct, but hey. Not much else to go by.
    If that thread really was supposed to be M11x1 then somebody in manufacturing was way off.... like I said, probably using a dull tool. Or trying to program the entire thread milling cycle starting from bad parameters. Or both. Basically this is what you get from the "lowest bidder" and not enough QA.

    Leave a comment:

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