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Posted on Jan 02, 2017
SOURCE: broken crankshaft pulley bolt on
The only possibility I can suggest is that which is called and 'Easyout.' These are available at parts stores and come (normally) with a sized drill and a special bit with left-hand threads.
First a hole is drilled with the provided drill bit, then the removal bit is screwed into the new hole and turned counter-clockwise which further inserts the removal bit and, if the removal bit does not snap, the broken threaded shank should back out.
I would suggest soaking the broken part with penetrating lubricant first and allowing it time to seep into the threads of the broken bolt.
Posted on Oct 13, 2008
You will have to drill the bolt out completely. You could first try an extractor set, it will have to be drilled to the size on the extractor set, use a product called PB Blaster and let it soak for a few days reapplying every 12 hours or so. If it broke off you may not be able to get it out with an extractor set but use the biggest extractor that will fit. If you have the head of the bolt and any threads showing you will have to fid a HSS Drill bit a little smaller than the outer diameter of the threads. then carefully drill the bolt out, it will take forever so take your time, I have set up drills with blocks and bungee cords so it will drill itself without you being in atendance, but the drill has to be positioned precisely as to not damage the inside diameter of the threads for when you install the new bolt. I even went so far at times at home to install a video camera to a small tv inside the house so I could monitor if the drill had changed position. I recently had to do exhaust bolts (6) and a spark plug that had rusted and broken off inside the motor, just the threaded portion of the spark plug was all that was there.
Posted on Feb 12, 2009
You will need a pulley puller made for that. No alignment problems, just slides back on keyway. I have a good but a little dangerous way of removing bolt. I get a one piece breaker bar 1/2" and whatever extension necessary, on a six point impact socket. drive a pipe into the ground, pull it out and knock the dirt out. Put the pipe back in the ground with the breaker bar, putting the socket on the center nut. remove coil wire and bump engine once.the engine will spin the bolt loose. Danger is that the bar can fly off or break. Have a shop loosen it if you can, also have them give it final tightening. you will have to remove any radiator components that are in your way before you start. You need just enough room to get the puller in there.
Posted on Mar 14, 2009
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