Exhaust Stud not Holding in Crankcase Options

[RestoReese]

As title says, I have an exhaust leak because one of my stud holes in the case is stripped and will not hold. Tried loctite red, but didn't hold with tightening. Also, wasn't sure it would hold with the heat. Thought about JB weld but then reconsidered.

I know I can tap to a larger diameter but wondering if others have had a similar issue and what you would recommend. Any guidance would be helpful.

Case is for 1971 1.7L.

[RestoReese]

Sounds like Time Sert or the step stud is the way to go. I called Porsche and they sell the M9-M8 as a Genuine part for $5.10 each, so thinking I will tap out the M9 and try that first. Time Sert is nearly $90 for the kit, and after 22 months of cost overruns, will be going cheapest route I can (IMG:style_emoticons/default/smile.gif)

And prior to installation, I took a large file and filed the exhaust inserts to be level (saw this on a YouTube video when I first started this project), and have new gaskets that firmly in place prior to placing the exhaust in. I could see the area where the gases were leaking and it was exactly where the stud wasn't torqued tightly so hopefully new studs will do the trick. I never found torque setting for these studs so will use the 18ft/lbs to be sure I don't over tighten.

Thank you everyone for the quick responses and great advice. I am close to the finish line with my restoration (22 months in), and once complete will post the project on the board and thank all of the many people on the fine forum who have helped me along the way.