I was taking the old thermostat out and my neighbor offered to help. The bolt broke off in the hole so the cover is off but cannot be replaced as the broken stem of the bolt is in there. What can I do?
2006-09-10 05:35:18 · 6 answers · asked by Lynnette K 2 in Cars & Transportation ➔ Maintenance & Repairs
You are dealing with an aluminum head. You will have to drill the bolt out. This is tedious. First, center punch the exact middle of the broken bolt. Start with 1/16 in. drill bit. Place the bit firmly on the center punch indention. Use a variable speed drill to slowly start penetrating the broken bolt. If you have one of the bolts intact, note the length of it and don't drill any deeper than necessary to go the full lenght of the broken bolt. Use the next size bit to enlarge the hole. Keep doing this until you have drilled out enough metal, and still have enough left that the threads of the bold are still there. Then, using a pick, carefully remove those thread fragments. If you ruin the threads, there are kits to replace messed up threads and you can generally tap out the hole for the next size bolt. Follow the instructions for replacing the thread inserts. Be very patient and use penetrating oil while drilling those incremental holes.
2006-09-10 05:53:36 · answer #1 · answered by Wayne T 2 · 2⤊ 0⤋
Wayne T's answer is the best one, however, if you use a left handed drill bit, many times the bolt comes out by itself around the bit. Also, be sure to use a little anti seize on the new bolt so this doesn't happen again.
2006-09-10 05:57:16 · answer #2 · answered by Thomas S 3 · 0⤊ 0⤋
I hate when that happens.
Head down to your local hardware store and purchase a "screw extractor" also known as an easy-out. Then CAREFULLY drill a hole down thru the center of the broken bolt. Put the extractor in the hole and back the bolt out.
2006-09-10 05:42:00 · answer #3 · answered by Anonymous · 0⤊ 0⤋
ok chief, i ve been extracting bolts all day at present, so I m clean from the combat. Heres what you could desire to do. Get a drill, a sturdy one, and purchase a set of cobalt left hand drill bits,a waft punch smaller than the broken stud, a can of penetrating oil and a center punch. i take advantage of PB Blaster penetrating oil. Spray the oil on he broken stud, and spray it genereously onto the manifold on the stud. faucet it with the waft punch and a hammer, preserving recommendations you decide directly to ask your self the threads , employing the oil into the threads. try this particularly some cases, each and every time sacrificing a chicken and working aroundthe vehicle thrice coounterclockwise( thst substitute right into a humorous tale btw). Then, take the middle punch, make a prick precise contained in the middle of the stud. this can provide the drill bit something to snatch, and wont enable it to glide. Now, commencing with a small drill bit, drill a hollow precise contained during the stud. pass slow, with metallic you decide directly to drill slow, with timber- you drill rapid--fyi. Now, boost the size of the hollow via one drill bit length. the factor of the left exceeded drill bit is that it's going to grab the stud and back it precise out of the hollow. If it doesnt artwork, proceed drilling the hollow out,fish out the relax products of bolt, and get a helicoil equipment and make new threads. Its extremely no longer a huge deal, bro, merely takes persistence and a few forethought. sturdy success.
2016-09-30 13:17:38 · answer #4 · answered by alia 4 · 0⤊ 0⤋
Unfortunately, this will NOT be that easy. You have to remove the remaining bolt. Do what the guys above say. They are right. Also, a torch might help expand the housing to help get the bolt out. And don't let your neighbor work on this car again!
2006-09-10 07:54:55 · answer #5 · answered by MrZ 6 · 0⤊ 1⤋
drill it out and get an easy out from the auto store,they screw in counter clockwise
2006-09-10 05:42:08 · answer #6 · answered by dale 5 · 0⤊ 0⤋