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Broken head bolt...

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Old Feb 6, 2017 | 06:43 AM
  #1  
jamestfl's Avatar
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From: South Flatistan
Default Broken head bolt...

So I'm doing a head gasket replacement this past weekend. The tear down on Saturday went really well, stopped at the heads. I go out Sunday morning and the first bolt to do is the LH side #1 head bolt. I end up snapping the thing. There's about 1 inch of bolt / stud still there. I did get the head off. Blown gasket at #7 and almost blown at #5. I try a couple of sears bolt extractors with no luck. How do I get this bolt out? Maybe try putting 2 nuts? Maybe try a ratcheting extractor that previous posters have suggested? I'm worried that I've screwed this engine. Any thoughts? ...
 
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Old Feb 6, 2017 | 07:15 AM
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I'd start with several doses of PB Blaster over a few hours. If there are enough threads, use two nuts as you mentioned and maybe a bit of GENTLE heat on the block.

Good luck.
 
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Old Feb 6, 2017 | 07:37 AM
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heat and oil is the normal. Let me know if you have to do thread repair i just went through all that on 4 stripped head bolt holes in my block.
 
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Old Feb 6, 2017 | 07:40 AM
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If there's threads on the bolt left try the two nuts method. If there are threads or that doesn't work a good old pipe wrench would probably do the trick.
 
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Old Feb 6, 2017 | 07:44 AM
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Get a larger coupling nut for more grip and a regular nut. PB blaster and be patient and let it soak for longer period. Good luck
 
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Old Feb 6, 2017 | 08:14 AM
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Scorched on 7 and a bit on 5



Deck scorching on 7



Fairly clean- maybe done before...



Internals, reddish brown in valley. Rocker arms fairly clean.
 
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Old Feb 6, 2017 | 09:20 AM
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those pistons are almost to clean.. it had to be the bolt back there that broke off. you may have to drill a hole in a piece of flat bar slip it over the bolt and weld it just be careful not to to get the bolt to hot.
 
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Old Feb 6, 2017 | 03:38 PM
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Originally Posted by Red5
I'd start with several doses of PB Blaster over a few hours. If there are enough threads, use two nuts as you mentioned and maybe a bit of GENTLE heat on the block.

Good luck.

X1 ........... good luck, what a bitch eh.
 
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Old Feb 6, 2017 | 03:41 PM
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Originally Posted by gulfdisco
those pistons are almost to clean.. it had to be the bolt back there that broke off. you may have to drill a hole in a piece of flat bar slip it over the bolt and weld it just be careful not to to get the bolt to hot.
Good idea, last resort tactic though.
 
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Old Feb 6, 2017 | 04:02 PM
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Use a good penetrating oil, and tap on it and add a little heat if you can. If you don;t have enough room for 2 nuts (it's hard to tell from the photo) maybe some vice grips if the penetrating fluid & heat loosens it up.
I've used this method for several broken bolts, but never a head bolt.
 
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