Here are the tests. Heli coil wins due to cost being much cheaper . time-sert next due to the narrowest repair but expensive
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You need to talk to a longtime Caddy tech, lololol!!!!!!Kia/Hyundai have block failure head bolts pull out and give you the same symptoms of bad head gasket , the fix is thread certs. Terrible Quality control don’t buy one there junk . The car not the repair .
And some Honda techs, and......
The butchery I've witnessed says that right there. Drilled offset/crooked by a mook deters a bunch who don't want to hog out a hole, or plop the carb down, then finger in the crooked stud every time. Unless You've got a live eyeball on it, hard to tell from pics, so....I agree when they are done right but I have seen a few done wrong/crooked, maybe that's where the hesitation come from.
I have NEVER had a problem with a Heli Coil. A few people in this thread have stated that sometimes people do a poor/crooked job of drilling out and tapping the hole. Big deal, people screw things up all the time. Just because a few people do something poorly, that does NOT make the product they screwed up a bad one.I have seen several ads and posts that make a big deal about the bolt holes not being helicoiled in an intake manifold. I don't get it. I've had many manifolds that have carb stud holes helicoiled and even one that had the themostat housing holes done and never had a problem out of them, what gives???? Some of the coolest manifolds haven't been made for 40 or 50 years.
It's not about the heli coil, I don't think anyone's arguing it's not better than threaded aluminum. I think what the problem with people being hesitant about used parts that have heli coils is if it was done right. You can't tell from a pic most times and I've seen some pretty bad heli coil jobs where it was unfixable without welding it which I think is a big deal. And then there are those who are just so anal retentive that no matter how good the heli coil is it just ruins that str-12 intake now matter how nice it is.I have NEVER had a problem with a Heli Coil. A few people in this thread have stated that sometimes people do a poor/crooked job of drilling out and tapping the hole. Big deal, people screw thins up all the time. Just because a few people do something poorly, that does NOT make the product they screwed up a bad one.