Chromedome Posted May 15, 2015 Report Share Posted May 15, 2015 I bought an '86 recently and found that four of the exhaust studs were stripped. I pulled the head yesterday and found that the PO had tried to drill out two of the holes with the head on the car and they are all wallowed out and way too big now. I need some options on how to repair this. If there's enough metal to do so, I'm thinking drilling and tapping to 12 mm and cutting the head off a low grade bolt, inserting it in the head, then drilling and tapping the bolt to 8 mm. Any other suggestions? Link to comment Share on other sites More sharing options...
psu_Crash Posted May 15, 2015 Report Share Posted May 15, 2015 I'm not sure there is room for 12mm, but a lot of guys have used 10mm exhaust studs. If you want to stick with the 8mm studs get some helicoils, don't install a cut off bolt in there and drill/tap it. Link to comment Share on other sites More sharing options...
jisleyjr Posted May 15, 2015 Report Share Posted May 15, 2015 I agree with the helicoil idea. I had to do that because of a similar situation. I ended up with 10mm studs because there wasn't enough material for 8mm helicoil kit to grab on to, which required me to drill out the exhaust manifold for the bigger studs. It worked out fine without any issue of loosing or exhaust leaks. Link to comment Share on other sites More sharing options...
importwarrior Posted May 15, 2015 Report Share Posted May 15, 2015 time sert is better and they sell a kit for standard and a LARGE kit for cars that hadhelicoils that failed the large kit is 10 to 12 mm in size and once installed it is forstandard 8 mm studs. i had to use the large kit for my head. Link to comment Share on other sites More sharing options...
Starfighterpilot Posted May 15, 2015 Report Share Posted May 15, 2015 time sert is better and they sell a kit for standard and a LARGE kit for cars that hadhelicoils that failed the large kit is 10 to 12 mm in size and once installed it is forstandard 8 mm studs. i had to use the large kit for my head. x 1000 - as long as the head is off. Those things will out last your Lady. Here's a link: http://www.timesert.com/ For What It's Worth. KEN 1 Link to comment Share on other sites More sharing options...
Chromedome Posted May 15, 2015 Author Report Share Posted May 15, 2015 time sert is better and they sell a kit for standard and a LARGE kit for cars that hadhelicoils that failed the large kit is 10 to 12 mm in size and once installed it is forstandard 8 mm studs. i had to use the large kit for my head. I think we have a winner! Thanks man! Link to comment Share on other sites More sharing options...
Metric-man Posted May 18, 2015 Report Share Posted May 18, 2015 Keenserts are by Alcoa (you know the aluminum company?)They have the studs and thread repair kitshttp://catalog.alcoafastenersandrings.com/advanced/general-purpose/metric-heavy-duty-studs? Link to comment Share on other sites More sharing options...
importwarrior Posted May 18, 2015 Report Share Posted May 18, 2015 regular kit http://www.timesert....l/mtrcsert.html Big Kit if you tried heli coils and they failed use the big kit.that is what i used. i installed mine while the head was still on the block in the car. http://www.timesert....ml/bigsert.html Link to comment Share on other sites More sharing options...
randy Posted May 18, 2015 Report Share Posted May 18, 2015 Nice find looks like a great product for thread repairing. Link to comment Share on other sites More sharing options...
importwarrior Posted May 18, 2015 Report Share Posted May 18, 2015 when i installed my timesert thread repair hardware i used this thread locker from RESBOND.i used it on the timesert when i installed them in to the head. i let it cure for over 24 hours.then used it on the studs as well and let them cure for 24 hours. it is EXPENSIVE !!! shelf life of 6 months. Be sure to use the RED stuff not Blue http://www.cotronics...readlockers.htm 2100°F Resbond™ 907TS Threadlockers Available in Viscosities and strengths to meet your toughest sealant needs. Its easy to use. No mixing required. Just apply and let dry to form thermally stable, electrically insulating, chemically resistant bonds. Packaged in convenient 4 oz. applicator bottles. Will not run off or drip while applying. Ideal for use on set screws, adjustment screws, fasteners, studs, bearings, bolts, pipe threads, large nuts, etc. Removable with hand tools. Link to comment Share on other sites More sharing options...
importwarrior Posted May 18, 2015 Report Share Posted May 18, 2015 Link to comment Share on other sites More sharing options...
TexasQuest Posted May 19, 2015 Report Share Posted May 19, 2015 I've used this Resbond stuff on my exhaust studs and so far it's worked great. Link to comment Share on other sites More sharing options...
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