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kate lara
Novice
Aug 26, 2007, 9:11 PM
Post #1 of 6
(7335 views)
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bolt broke off in block
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hi, its me again. got the hormonic balancer off and it does look a little on the shabby side. But was trying to remove the water pump I rounded off a bolt. then proceeded to weld a nut to the end of it, which then twisted off (not a good day) got any ideas as to getting the durn thing out now. 360 dodge coachman motorhome.
thanks
kate
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Aug 27, 2007, 5:59 AM
Post #2 of 6
(7328 views)
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Re: bolt broke off in block
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Is the bolt still there rounded off? There are a couple approaches that can work before you need to drill it out which can be a nightmare - avoid that if at all possible.
They make tools called "stud estractors" which get tighter the harder you turn kind of like a pipe wrench. Better yet is to soak whatever you can get at for threads with PB (power blaster) and wait a day if needed. Find a socket metric or standard that you are willing to abuse. If you get one just close enough - hammer it over the rounded bolt till it's as tight as possible without breaking the socket. Best now to use a weak air tool. The 3/8ths speeder air ratchet for starters. The idea is to rattle the rust where it is stuck. This tool is generall not strong enough to break the bolt. Go forward a little and backward a little and when you detect any real movement of the bolt itself keep at that a little at a time - forward and backward (out) and eventually it should give way and come out.
Take all the time you need as it will cost tons of time if it breaks and lots more work. If it breaks off flush I don't know of a way other than drilling it out. Must be awesome strengh metal drill and a straight line in center of now stud. Screw extractors can be used and don't break them off as I don't know of a drill that can drill those!! Heat like oxy-acet can get just the bolt glowing but that should be a last ditch try. Heat takes away some of the hardness of the bolt (you've already welded it) and it will break off even easier. Heat expands which actually makes the bolt larger which is tigher but heat transfer to the threaded hole is slower and it tends to break that bond.
This is tough stuff and in some cases you may have to remove the part that is the problem to get a straight shot at it,
T
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Dynamix
Novice
Sep 29, 2008, 6:32 PM
Post #3 of 6
(6781 views)
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Re: bolt broke off in block
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Hold on I'll be right over.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Sep 29, 2008, 6:36 PM
Post #4 of 6
(6779 views)
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Re: bolt broke off in block
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Go away!
T
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cpaine0106
User
Feb 15, 2009, 2:58 PM
Post #5 of 6
(6536 views)
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Re: bolt broke off in block
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I'm sure this has been fixed by now, but for anyone else with a similar problem that finds themselves here; many tool companies are now producing a tool called a "bolt extractor." This is a socket with internal reversed threads that bite into a rounded bolt head and pull the tool on tighter as the the bolt is turned counter-clockwise. These work great when the head is too rounded to pound a smaller socked on, or there's no room to swing a hammer. The tool from Craftsman is fine for occasional use, but if it is used frequently, you'll find yourself making frequent trips to Sears for replacement. Snap-on and Mac sell very high quality sets. They're expensive, but in this case, you get what you pay for.
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sean882
Novice
Mar 11, 2009, 10:20 PM
Post #6 of 6
(6468 views)
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Re: bolt broke off in block
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I've seen those, they look pretty neat. Though I still like my simple method - a bolt cutter wheel on a dremel tool. Just use it on the exposed surface to create a notch, spray a little liquid wrench or PB in there to loosen it, and just use a slotted (flat) screwdriver to twist it right out.
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