Any advice on replacing exhaust intake manifold or drilling out frozen bolts..I have been soaking broken off bolts w/penetrating juice. no joy thanks...andy
no, I broke heads off I got manifold on bench. put pipe wrench to protruding stud and if I break whats left, I figure I will try to drill out and replace with hard bolt..sound right? thanks..andy
Yea, you could drill out and maybe re-tap the threads! just a thought could you apply heat from a torch to the studs? get the stud glowing red then let it cool down before you use the pipe wrench! Just a thought! Good Luck! Allen
Little HEAT I grind a groove for a screwdriver or used channel locks if there is something to grab, and some heat. If you drill start with a smaller size bit (new good quality bit) good luck. been there....
Broken Stud I assume it's the collector stud you're struggling with ? . Wire brush it very well then find the biggest flat washer you can with the correct size hole , slip that over the old stud stub and weld a nut to the stud , once cooled , use the gas torch to heat up the stud & nut white hot then rapidly quench it with the garden hose ~ the rapid contraction of the white hot stud will cause it to shrink & break the threads loose . The flat washer ensures you don't overheat the manifold proper and prevents the torch's flame from heating the manifold flange at the same time you're super heating the stud . Remember to run a Tap in the hole before installing the new stud and never , EVER use a bolt in the exhaust manifold flange . The slower and more carefully you approach this repair ,the easier and better it will go . If this is for a V-8 , new Ram's Horn exhaust manifolds are available from ATP
