Vegablade Posted July 8, 2005 Share Posted July 8, 2005 alright quite a while back my exhaust got smashed by a huge rock and when i got under the car i noticed a bolt was missing on the passenger side. so i go to tighten it up and all of a sudden the bolt falls out with most of the threads and the pipe wasnt even close to flush. so since then i have bought some heli coils and have straightened thet pipe. now the guys at the parts place said i needed a special tap. is he lying to me, and has anyone done a heli coil on exhaust. its a 10mm by 1.25pitch bolt. im going crazy not being able to drive my car. also all i know about the coils is whats on the box, 770-3025 M10x1.25 Metric Thread Repair Inserts Quote Link to comment Share on other sites More sharing options...
TomRhere Posted July 8, 2005 Share Posted July 8, 2005 Yes, special size drill bit and tap for doing a Heli-coil. Drill out hole, tap in threads, insert Heli-coil, install normal bolt into new threads. Quote Link to comment Share on other sites More sharing options...
Vegablade Posted July 8, 2005 Author Share Posted July 8, 2005 but what size hole and tap pitch Quote Link to comment Share on other sites More sharing options...
Ross Posted July 8, 2005 Share Posted July 8, 2005 You need a special Heli-coil tap, its not a standard size. Quote Link to comment Share on other sites More sharing options...
Vegablade Posted July 8, 2005 Author Share Posted July 8, 2005 crap! the kits are like 60 bucks. Quote Link to comment Share on other sites More sharing options...
ballitch Posted July 8, 2005 Share Posted July 8, 2005 10 mm is close to 7/16'' right? cant you just drill out the heli coil a little bit, then put in a 7/16'' bolt after you tap the heli coil to 7/16''? ~Josh~ Quote Link to comment Share on other sites More sharing options...
Vegablade Posted July 8, 2005 Author Share Posted July 8, 2005 no, heli coils are like little springs. Quote Link to comment Share on other sites More sharing options...
NoahDL88 Posted July 8, 2005 Share Posted July 8, 2005 I used the 7-16th on mine, worked like a charm, use 7/16th bolts and you'll be good to go. Quote Link to comment Share on other sites More sharing options...
NorthWet Posted July 8, 2005 Share Posted July 8, 2005 crap! the kits are like 60 bucks. Last time I got a heli-coil single-size kit (a year ago?) it was only about $20. Do you have the install tool, or did you just buy a package of coils? 11mm x 1.25 might be a better choice then 7/16th inch. Approx same size as 7/16ths, same size and pitch as head bolts, and keeps it metric (I hate mixed-standard vehicles). Quote Link to comment Share on other sites More sharing options...
s'ko Posted July 8, 2005 Share Posted July 8, 2005 I also found that 7/16th is an odd size. Home Despot doesn't have then and the ones at the autoparts stores are often too short. Solved it by buying one that was 3 inches long and hacking it down. Quote Link to comment Share on other sites More sharing options...
NorthWet Posted July 8, 2005 Share Posted July 8, 2005 I also found that 7/16th is an odd size. Home Despot doesn't have then and the ones at the autoparts stores are often too short. Solved it by buying one that was 3 inches long and hacking it down. Are you talking about it being an odd size for bolts??? If so, not around here. :-\ Quote Link to comment Share on other sites More sharing options...
Vegablade Posted July 9, 2005 Author Share Posted July 9, 2005 see, i have the coils i just didnt buy the tap or install too because i figured i could use the bolt to install it and the tap would be some normal size. guess i will have to save my money, man my subaru hasnt been going for like 2 months now, its driving me crazy. Quote Link to comment Share on other sites More sharing options...
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