Head Bolt Stripped
I have a 94 accord. I am putting a new head gasket in and as I was taking the 10 bolts that hold on the head to the block off and I noticed that one of them is stripped and I tried many different sockets on it and it just doesn't seem to come off. I tried using an air hammer and putting a chisel at the end of it to get it to budge but it doesn't even move at all.. Using a chisel has always worked for me to get stripped bolts off.. Does anybody have any other idea's on how I would get that bolt off?
Honda-Tech Member
Joined: Aug 2004
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From: Altamonte Springs/Orlando, Florida, USA
Drill into it slowly, with lubrication.
Stay square into the center of it use a small bit then go bigger and fit a screw extractor into it or smash an undersized sized socket over it after deforming the outer diameter.
I've done it.

Stay square into the center of it use a small bit then go bigger and fit a screw extractor into it or smash an undersized sized socket over it after deforming the outer diameter.
I've done it.

yes you could drill it out or if your gonna replace the bolt get a slightly too small socket and hammer it on there till its stuck. then just loosen it right up. you lose the sokcet and the bolt but its quite easy
i already tried putting a smaller size socket on it and hammering it but it still strips it out.. but i will try drilling it and using a screw extractor... what is a twist of socket? i never heard of it.. does anybody else have any other ideas that might work or that you know works?
Drill the head of the bolt completely off and remove the head, Then use vice grips to remove head bolt, it will come out easily.
Did this on a few motors... Don't drill into the head!
Did this on a few motors... Don't drill into the head!
Honda-Tech Member
Joined: Aug 2004
Posts: 4,638
Likes: 0
From: Altamonte Springs/Orlando, Florida, USA
You don't lose the socket?
i already tried putting a smaller size socket on it and hammering it but it still strips it out.. but i will try drilling it and using a screw extractor... what is a twist of socket? i never heard of it.. does anybody else have any other ideas that might work or that you know works?
You'd have to be a complete dummy to drill in the head you'd have to be holding the drill diagonal in any way to be doing that.
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I've used these before and without a doubt this is what I would be using if it was me in this situation.
he isn't saying to do all that with the head on the motor still. He is saying to drill the bolt with a big enough drill bit to remove the head of the bolt from it's shaft. Once the head of the bolt is removed and the other bolts are removed you can remove the head and proceed with removing the threaded part of the bolt. So if doing it this way, it could be easy enough to drill into the head.
I've used those extractors, had some luck and some breaks. For a head bolt, I'd use the craftsman bolt out's before anything else, as long as there is room for it to fit. Those should remove the bolt the easiest and without having to drill anything and make sure you are drilling perfectly inline with the bolt.
It's a head bolt there isn't tons of play room, drill square into the middle of the bolt and drill very deep this takes a couple of hours get a worm gear style screw extractor and a T-handle with a long shank.
You'd have to be a complete dummy to drill in the head you'd have to be holding the drill diagonal in any way to be doing that.
You'd have to be a complete dummy to drill in the head you'd have to be holding the drill diagonal in any way to be doing that.
I've used those extractors, had some luck and some breaks. For a head bolt, I'd use the craftsman bolt out's before anything else, as long as there is room for it to fit. Those should remove the bolt the easiest and without having to drill anything and make sure you are drilling perfectly inline with the bolt.
Honda-Tech Member
Joined: Aug 2004
Posts: 4,638
Likes: 0
From: Altamonte Springs/Orlando, Florida, USA
he isn't saying to do all that with the head on the motor still. He is saying to drill the bolt with a big enough drill bit to remove the head of the bolt from it's shaft. Once the head of the bolt is removed and the other bolts are removed you can remove the head and proceed with removing the threaded part of the bolt. So if doing it this way, it could be easy enough to drill into the head.
I've used those extractors, had some luck and some breaks. For a head bolt, I'd use the craftsman bolt out's before anything else, as long as there is room for it to fit. Those should remove the bolt the easiest and without having to drill anything and make sure you are drilling perfectly inline with the bolt.
I've used those extractors, had some luck and some breaks. For a head bolt, I'd use the craftsman bolt out's before anything else, as long as there is room for it to fit. Those should remove the bolt the easiest and without having to drill anything and make sure you are drilling perfectly inline with the bolt.
Unless you're using a dremel with a cut off disc and taking it clean off using it as a bench mark.
You must have been using thin extractors if you were breaking them. You use the biggest one you can get in there and worm gear style extractors come in very large sizes.
You're tearing into probably tool steel and it looks like torn up aluminum, I'm guessing you used metal feelers? Blindly drilling into a bolt is retarded.
When you drill into the center of a fastener it loses tension since it's losing the mass that exerts on the threads.
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