Hi Kenneth, Just read this and want to pass on a method that worked on one of our 494's.
Drill and tap to 5/16-18. Install 5/16 stud. Easy, fast and has held up! Helicoils require special taps and installation tools and are easy to mess up if you are not careful. I like to keep it simple. HTH, and a belated thanks for the Runoffs DVD, Charlie and Marilyn Schlismann #71 MiDiv > 1. Re: Stripped exhaust thread options (Kenneth > Kirkland) > > From: Kenneth Kirkland <[EMAIL PROTECTED]> > To: [email protected] > Date: Fri, 2 Feb 2007 09:01:42 -0800 (PST) > Subject: Re: [F500] Stripped exhaust thread options > > Guys, > > Thanks for all of the feedback. It was very > informative. I think I'll proceed in order of the > options that remove the least amount of material: > > 1) HeliCoil > 2) drilling and tapping for M9 X 1.0 > 3) drilling and installing the Muller Insert > > Thanks again for the 411, > Kenneth Kirkland > #18 MiDiv / Arkansas Region (77) > 1991 KBS Mk. V > www.kirklandracing.com > > > --- [EMAIL PROTECTED] wrote: > > > Not having read any of the other thread > > contributors, I would still go with > > a thread insert kit (aka HeliCoil). > > > > ----- Original Message ----- > > From: "Kenneth Kirkland" <[EMAIL PROTECTED]> > > To: <[email protected]> > > Sent: Thursday, February 01, 2007 1:57 PM > > Subject: [F500] Stripped exhaust thread options > > > > > > > Hello All!!! > > > > > > I have a situation that I'd like to bounce off > of > > the > > > list before attempting repairs on a cylinder > jug. > > > > > > In the process of installing my rebuilt 494, I > > > discovered stripped threads on one hole of the > pto > > > exhaust port. The original 8mm x 1.0mm threads > > were > > > apparently stripped in the past, repaired with > > > something in the 6mm/.25 inch range, which has > now > > > stripped. 6mm and 1/4" bolts feel like they're > > > threading up, but when it's time for them to > > really > > > torque down, they just keep turning. > > > > > > What's the best way to deal with this? Do > another > > > repair with a thread smaller than the original > > 8mm? > > > Drill the hole out and tap it at 9mm x 1.0mm? > > > > > > Thanks in advance for any and all assistance, > > > Kenneth Kirkland > > > #18 MiDiv / Arkansas Region (77) > > > 1991 KBS Mk. V > > > www.kirklandracing.com > > ________________________________ ________________________________ FormulaCar Magazine - A Proud Supporter of Formula 500 The Official Publication of Junior Formula Car Racing Subscribe Today! www.formulacarmag.com or 519-624-2003 _________________________________ _______________________________________________ F500 mailing list - [email protected] To unsubscribe or change options please visit: http://f500.org/mailman/listinfo/f500 *** Please, DO NOT send unsubscribe requests to the mailing list! ***
