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Getting out manifold bolts--need advice

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Roger

05-29-2003 18:34:40




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I need to replace the manifold on my 430. Assuming that the bolts will break off (one already is broken) can I get them out with an easy out?
Or do I need to drill them out.

Thanks for your help.

Roger




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Mike Aylward

05-30-2003 08:41:27




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 Re: getting out manifold bolts--need advice in reply to Roger, 05-29-2003 18:34:40  
Roger, here is the procedure I use to get manifold bolts out assuming there is some bolt left to get ahold of. First, heat the bolt ONLY and let it cool naturally. Next, heat the bolt AND the surrounding area, and while these are hot take an ice cube and put on the bolt to shrink it quickly (use gloves as the steam given off is hot). I have done this many times and quite often you can remove the bolt with your fingers. If it doesn't work the first time and it usually will the second. Hope this helps. Mike

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CJDave

05-30-2003 00:18:31




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 Re: getting out manifold bolts--need advice in reply to Roger, 05-29-2003 18:34:40  
Save your self the grief and expense of drills, EZ-outs, and damage to the cast iron threaded bore. Weld a nut on top..... let it cool for HOURS till the broken bolt thread has shrunk back farther than it was....then slowly work it back and forth till it unscrews. If the nut twists off.....do it again..... and again.....you'll get it.



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chris

05-29-2003 23:16:42




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 Re: getting out manifold bolts--need advice in reply to Roger, 05-29-2003 18:34:40  
I would start by striking the end of bolt/stud with a hammer and punch. By striking the bolt/stud this seems to releave the threads and the bolt/studs come out alot easier. Try a few swings then try loosing the stud/bolt, then back to swinging,loosening,etc. I've had great results. chris



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Lee

05-29-2003 22:36:06




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 Re: getting out manifold bolts--need advice in reply to Roger, 05-29-2003 18:34:40  
My advise is to never drill or attempt EZout especially in cast iron. So much easier to heat till red hot, clamp with visegrip and work the bolt out slowly as bolt cools. Not enough to grab? Weld it up till there is.

I followed this advice to fix 3 broken manifold bolts on my own 43 A - it works and no broken drills, taps, or EZouts to really complicate the issue. I can remember about a dozen broke off exhaust studs on several chevy pickups that I wish I had treated as above - would have saved me a world of misery and several drills, taps, and ezouts too.

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Duane Larson

05-29-2003 21:53:32




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 Re: getting out manifold bolts--need advice in reply to Roger, 05-29-2003 18:34:40  
Roger,
No question in my mind - drill them out (unless you have at hand equipment to remove broken ezouts). A broken bolt can be drilled, a broken ezout can't.



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John T

05-29-2003 20:48:58




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 Re: getting out manifold bolts--need advice in reply to Roger, 05-29-2003 18:34:40  
Good Evening Roger, Ive had some luck geting broken bolts out using an easy out, but HARDLY EVER on those in the JD's or any other high heat and years of use application. In some places, Ive had some luck welding a nut on top of a broken off bolt or stud and then they will turn out. If its broke down close and the weld a nut on trick wont work, I try and grind the surface as smoth and even as possible so I can use a dot punch and and get a good DEAD CENTER drill start mark. Then use good quality hard bits startign with a small size and working up. I replace with hard studs or bolts and apply plenty of anti sieze grease and use stainless or brass nuts and washers.

Good Luck John T Nordhoff

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Clooney

05-29-2003 18:58:16




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 Re: getting out manifold bolts--need advice in reply to Roger, 05-29-2003 18:34:40  
Roger, you are better off drilling them out & chasing the threads with a proper sized tap. Start with a small drill bit & get the hole centered & straight. Then use progressively larger drill bits until you get just under tap size. Try to keep the holes centered & running straight. I have a full set of left hand drill bits for drilling out broken bolts. The L/H drill bits are great for that task as there is good chance the drill bit will catch on the broken bolt as you start to get near bolt size & back the broken bolt out on the end of the drill bit. ~Be careful when drilling those bolts out & don't drill too deep & into the cylinder head.
~I would suggest that YOU NOT try to use an easy-out. Those easy-outs are mis named & should be called a bolt expander as that is usually what they do. If the bolt was stuck hard enough to break off to begin with why would a twisty little piece of metal be strong enough to remove it. If you break one of those hardened easy-outs off [and you will] they are near impossible to get out..

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Tugboat

05-30-2003 08:19:51




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 Re: Re: getting out manifold bolts--need advice in reply to Clooney , 05-29-2003 18:58:16  
Clooney; I agree with your comment about easy outs. Someboby needs to invent an easyout remover. They could call it an easyout easyout. There's nothing worse then hearing that SNAP from a broken easyout as you try to back that bolt or stud out of the hole. I don't use them anymore for two reasons. First is that I don't like them and the second is all the ones I had are broken anyway. Now I use the welded nut trick but I wet the stud with a little P.B. Blaster and give it a few love taps first. Usually works on the first try.
I always enjoy reading your posts. Please keep it up!
Regards, Tugboat

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DaveWis

05-30-2003 17:46:19




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 Re: Re: Re: getting out manifold bolts--need advic in reply to Tugboat, 05-30-2003 08:19:51  
In my experience, the only time easyouts work is if the stud/bolt is broke off from something other than stuck threads. Over the years I have removed hundreds of them by welding a washer on them first then welding a nut to the washer. I do it that way because you get a better weld to the broken bolt. Also you get two heat-cool cycles which helps break the rust.



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CJDave

05-31-2003 03:00:43




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 Re: Re: Re: Re: getting out manifold bolts--need a in reply to DaveWis, 05-30-2003 17:46:19  
Hmmmmm..... I'll have to add the "washer step" to our usual welding procedure. That sounds like a good way to increase the probability of a successful "extraction". One good thing about welding....the weld doesn't care if your best buddy's EZ-out is broken off in there or not, and usually by the time someone calls me for help or advice, they have a drill, a tap, or an EZ-out broken off in the hole.

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