Quote:
Originally Posted by Troutman
That is a great solution although not available in the UK and import/postage would make it too expensive..I am getting something similar made to screw on the broken studs, it'll have a 3mm hole drilled right through. Cost £7.
I ordered some PBB which again is not easily available in the UK . cost me £12 ($15) for a can. I read somewhere it's better than WD40 for penetrating the threads. They key here is to make sure you clean off all the corrosion where the stud enters the head to allow oil to go in. I'm going to heat them up too which might help draw it in.
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PB Blaster is okay, there are better penetrating oils. Mix atf and acetone 50/50 . I don't remember if your engine is out to the car. I would be tempted to attach the old exhaust gasket and weld a nut on to the stud remains--the heat helps break the bond between bolt and aluminum. Gotta be uber careful, tho. Or if you have ox/acetylene, just heat the stud and crank it out with vice grips.
I wouldn't use studs with copper nuts, copper gets soft under relatively low heat. I would use brass nuts instead. Toyota used to do this.
I don't think I'd try to drill and easy out them either. Very small studs, the danger is breaking off either the drill or the eazy out. Then you are truly screwed. Both are hardened and resist drilling.
