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now the method that you use will vary with the location and type/size of the bolt, and how far below the surface it broke off, in some cases a NUT can be welded on and the combo of the larger grip surface and the heat of the welding will loosen the threaded section fairly easily
THE TRICK with sucessfully useing easy outs correctly is that you need to center the drilled hole (it should be about 2/3-3/4 of the bolt dia.)and drill it ALL the way thru the remaining bolt both centered and CONCENTRIC with the bolt centerline and TO SOAK the bolt threads LIBERALLY over 30 minutes with a GOOD PENETRATING OIL that can reach both ends of the bolt (I strongly advise »
http://www.freealloil.com/ )
most failures are due to rushing the job,
(not soaking a MINIMUM of 30 minutes)
(not useing a good corrosion removing penetrating oil)
(appling too much torque to the easyout, if it won,t back out easily in most cases you did not use enougth oil or waited long enought)
(or and this is most of the time, not drilling the hole both concentric and all the way thru the bolt)
http://www.crustyquinns.com/tech/easyout.html
http://www.asashop.org/autoinc/may2003/techtotech.htm
"How would YOU go about trying to remove a cast iron exhaust manifold that has been in place for??? 20 years?"
well Id sure soak it down liberally and often over several days if I could wait that long,with a good penetrating oil, and Id use a small hammer to tap hard on each bolt head a good deal while I was appling that oil to allow the vibration to work the oil flow into more places,Id also get some rounded bolt head removal sockets
Okay how about tricks for keeping them from turning into the rusted ready to snap pieces of junk, in the first place?"
use grade 8 stainless and a coat of ANTISEIZE paste on the threads durringg assembly tends to prevent the problem
http://www.jegs.com/webapp/wcs/stor...atalogId=10002&storeId=10001&categoryId=22449
THE TRICK with sucessfully useing easy outs correctly is that you need to center the drilled hole (it should be about 2/3-3/4 of the bolt dia.)and drill it ALL the way thru the remaining bolt both centered and CONCENTRIC with the bolt centerline and TO SOAK the bolt threads LIBERALLY over 30 minutes with a GOOD PENETRATING OIL that can reach both ends of the bolt (I strongly advise »
http://www.freealloil.com/ )
most failures are due to rushing the job,
(not soaking a MINIMUM of 30 minutes)
(not useing a good corrosion removing penetrating oil)
(appling too much torque to the easyout, if it won,t back out easily in most cases you did not use enougth oil or waited long enought)
(or and this is most of the time, not drilling the hole both concentric and all the way thru the bolt)
http://www.crustyquinns.com/tech/easyout.html
http://www.asashop.org/autoinc/may2003/techtotech.htm
"How would YOU go about trying to remove a cast iron exhaust manifold that has been in place for??? 20 years?"
well Id sure soak it down liberally and often over several days if I could wait that long,with a good penetrating oil, and Id use a small hammer to tap hard on each bolt head a good deal while I was appling that oil to allow the vibration to work the oil flow into more places,Id also get some rounded bolt head removal sockets
Okay how about tricks for keeping them from turning into the rusted ready to snap pieces of junk, in the first place?"
use grade 8 stainless and a coat of ANTISEIZE paste on the threads durringg assembly tends to prevent the problem
http://www.jegs.com/webapp/wcs/stor...atalogId=10002&storeId=10001&categoryId=22449
