John I have all the extractors and have tried all the tricks with and without a welder. The problem remains that the studs are down inside a coolant jacket in the corner so that even if you could drill them you would need a foot long hardened drill to keep the hole straight. I have done this in shop and no longer bother drilling when its broken close to flush and tack welding a nut to the stud fails Bob ----- Original Message ----- From: "John Rodgers" <j_rodgers@charter.net> To: "Robert Donalds" <bostneng@FCL-US.NET> Cc: <vanagon@GERRY.VANAGON.COM> Sent: Tuesday, May 14, 2002 12:12 AM Subject: Re: Head gasket job getting out of hand (
> Bob, When I was active in the aviation industry, the shops where I would work, and even some guys out in the field, had little jigs that were designed to allow one to set up and drill straight down through the center a stud. After that a tool called and "Ease-out" was used to back the stud out. The ease-out had a left-hand thread, sharp edges on the thread, and it't pitch was extremely course, like maybe 1:3 -- one turn of thread in three inches of length . Anyway, if the stud was drilled out sufficiently it was usually not much more than a shell, and > the thread of the Ease-out would catch, and get a deeper bite as you turned the ease-out counter clockwise. I don't recall ever seeing a failure when the stud was drilled right. And some of those aircraft engine studs - especially on the big radial engines - were awsome. > > John Rodgers > 88 GL Driver > > > |
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