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broken head bolt on an H

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Digger

01-03-2004 21:01:51

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I have created myself a nice little problem. I have snapped a head bolt off, and this head bolt falls on the side of the water jacket and after removeing the water jacket cover I now why it broke. The water runs over the bottom of the head bolts on that side but now matter. I have drilled out the center of the bolt tryed an easy out no luck. Im not right on center little to one side. going to try the heating it next and useing the easy out. and I am wounder with all the know how out there I might be able to get some other ideas from you all i'm stll learning, and I dont think I'm the only who has broken a headbolt. Thanks in advance! Dig

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farmall

01-04-2004 08:52:56

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Re: broken head bolt on an H in reply to Digger, 01-03-2004 21:01:51

Take a larger nut (5/8-3/40) and set on top of broken stud. Weld nut to stud. When nut cools it will turn right out. Do it all the time. Hope this helps.

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stxtech1

01-04-2004 19:45:40

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Re: Re: broken head bolt on an H in reply to farmall , 01-04-2004 08:52:56

I have to agree with farmall, using a nut one size larger than the broken bolt seems to work the best for me. Crank the heat up and weld from the center of the bolt to the outside and up to the top of the nut. Dont be too concerned about weld sticking to the block because it is cast iron and will come right off. Do the weld hot and fast, all at one time. After welding let it cool and you are "usually" able to turn the bolt out. Bad thing about this method is once you start you are committed to finish it this way, the top of the bolt will get very hard and will be difficult to drill. I very seldom use an "easy out" because too often I break them off and then you are really in pickle.

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kraigWY---heat stop

01-04-2004 08:44:51

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Re: broken head bolt on an H in reply to Digger, 01-03-2004 21:01:51

There is a item, (paste) called "Heat Stop". Its sold by Brownell's Gunsmithing Supply" (they are on the web. You put the paste on the part (block) you don't want to heat. Then you can weld an extention bolt on the broken stud. While hot it will come right out. The Heat Stop will keep the block from getting hot. I use it when welding bolt handles on rifle bolts to keep the heat from drawing the temper from the bolt. It would great on removing broken bolts from cast iron. You wont believe this until you try it but you can put the paste on a spike (large nail) hold onto the end with the paste and heat the other end red hot with out burning your fingers. Rather in-expensive also.

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tractorhead

01-04-2004 07:32:45

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Re: broken head bolt on an H in reply to Digger, 01-03-2004 21:01:51

Digger; all the above can work and do work in there own way, but if these fail,and you bugger the hole up to the point it is no longer any good,drill the holeout to the next suiteable tap size then make a new step stud with the new size on the bottom and the original size the rest of the way. being a pump machinist for 40 years i saved many of pump casings this way.um you may have to find a machine shop to make this stud but it is a small easy job

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Paul in Mich

01-04-2004 10:50:14

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Re: Re: broken head bolt on an H in reply to tractorhead, 01-04-2004 07:32:45

Tractorhead, I'm sure that anyone who has ever worked on pumps will agree that they are the source of more broken bolts than any other thing in existence. I've rebuilt my share and each one seems to present a new challenge. In addition to all the good suggestions I've seen here, a good set of transfer punches is another tool that is of great value when trying to drill into the center of a bolt. In the case of a head bolt, the head can be mounted back in place and a transfer punch slipped into the problem spot. This doesnt remove the stud but in many cases it enables a good start.

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tractorhead

01-04-2004 12:07:16

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Re: Re: Re: broken head bolt on an H in reply to Paul in Mich, 01-04-2004 10:50:14

yup your right,forgot about them ol transfer punches,been retired too long i guess

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jason

01-04-2004 04:50:25

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Re: broken head bolt on an H in reply to Digger, 01-03-2004 21:01:51

make sure you drill all the way through the bolt that takes alot off stress of the bolt. i had a broken bolt in the same spot on a h block, drilled through it and heated it red hot just the bolt not the block put in an easy out spun right out. good luck.

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Larry

01-04-2004 03:38:04

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Re: broken head bolt on an H in reply to Digger, 01-03-2004 21:01:51

I've got a suggestion, if you got a hole drilled completely thru the bolt, cut the bolt out with your cutting torch--I'll admit its probably not the best way, but it can be done, and if you're lucky and careful, you won't even hurt the threads in the block--and since its into the water jacket, slag can be cleaned right out. Just try and split the bolt in about 3 sections and then see if you can drive it down and into the water jacket. Its kind of a pain, but I've done this several times (on different things)and....knocking on wood....its worked for me everytime so far. If you don't feel comfortable doing it, have a welder stop by your shop and do it...still beats the other alternatives.

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Paul White

01-04-2004 00:11:47

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Re: broken head bolt on an H in reply to Digger, 01-03-2004 21:01:51

I forgot to mention that EBAY has a lot of helicoils & repair kits of all sizes. Just enter the word "helicoil" in the "SEARCH", and shop till your hearts content.

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Slowpoke

01-08-2004 00:19:40

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Re: Re: broken head bolt on an H in reply to Paul White, 01-04-2004 00:11:47

If you have to go the Helicoil way, be sure to use enough of them to equal the tapped thread length. If you don't match the original thread length, there's a chance the single Helicoil could be pulled out and strip the new threads. Check the instructions on the box.

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Paul White

01-03-2004 23:21:45

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Re: broken head bolt on an H in reply to Digger, 01-03-2004 21:01:51

Digger you have just become a member of the "Broken Bolt Club". Each member can tell you a million ways to get them out without damaging the threads. But dont get discouraged. Even if you damage those threads, the "helicoil" was invented for repairing damaged threads. Just for a start, go to the WEB and enter "helicoil" in your search. You will then be led to many suppliers of helicoils and tool kits. Good Luck

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lee

01-03-2004 23:10:14

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Re: broken head bolt on an H in reply to Digger, 01-03-2004 21:01:51

I would be careful to heat it too much locally as you can crack the block casting. This is a long shot short of pulling the engine and getting it to a machine shop. Milwaukee and others make a real heavy duty, portable, magnetic base drill press. If you could locate one to borrow or rent you might use it to mill that bolt out to near tap drill size with a carbide end mill and then re-tap it. The problem with a hand drill is you are probably off center and way out of square. That head bolt is in there a ways. Sorry to say, I think you know you are in deep do-dah, digs. Worst case, you get that block to a shop, they'll fix it.

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F-man

01-03-2004 21:20:58

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Re: broken head bolt on an H in reply to Digger, 01-03-2004 21:01:51

Well, everybody has their own technique for busted bolts. I usually drill the bolt out as far as possible without getting into the threads. You can then take a small punch and wittle out the remaining material from the casting. If you get about a third of it out, you can chase the rest of it out with the proper size tap since it is open under the stud. I've done this many times and it is frustrating! Easy Outs work great on newer stuff. They don't work too well on 50 plus years of rust! Good luck to you and yes, we all have had our share of busted bolts. You will get the hang of it because this won't be your last!

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Tommy H

01-03-2004 21:30:53

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Re: Re: broken head bolt on an H in reply to F-man, 01-03-2004 21:20:58

Hmm, i broke a botl off on the Coolant neck on my car once. Broke an easy off on the drilled bolt. Took a whole day t oget it out...not fun.

Sell the tractor on Ebay...

just kdding. I wouldnt advise using alot of penetracting lube here, it will make a neasy out unaffective. Be carefull where the shavings go.

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