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Stripped Water Pump Stud 700 1991

Well, I have to admit that my 4th of July was less productive than I had hoped for. It all went well and I assembled the car after a waterpump, timing belt and seal job. Then I torqued the bolts for the waterpump when one of the studs got stripped along with the nut. Now the nut is just spinning and I'm trying to get it off. That will take some time, but I think that will not be such a big problem. What I'm a little nervous about is removing the stud. What is the best way to remove the stud, without snapping it? After reading much about snapped bolts and studs (both on this site and on a similar Porsche site), I understand heat is the solution, but how much and where? What is the procedure for removing the stud properly? Is there any special tool that should be used? Also, since the stud is somewhat stripped, how will I be able to hold onto the bolt? Just use an adjustable wrench to try to turn the bolt? There is about 1/4 inch thread left close to the block that is not stripped, but I don't think that is enough to use the two-nut trick on. Another thing I have read about is to weld on a nut on the stud, so that one can use a wrench to apply torque and get the stud out. Should I just give up and tow the car to a mechanic to have the stud removed? OK, so what are some suggestions for dealing with this problem?

My next question related to this what did I do wrong? I read the 700/900 archive on waterpump replacement. Followed that to the point. Put some anti-seize on the bolts and nuts. Then looked up the torque in the Chilton manual for the proper torque for the waterpump, which is 15-20 Nm. I figured to be safe go with the lower number and torqued all bolts and nuts to 15 Nm. I usually use anti-seize on any bolt that may be difficult to remove in the future. I suspect that the anti-seize acted as a lubricant and threw off the torque, which made the 15 Nm (with lubricant) much more torque in reality. Should I not use anti-seize on bolts anymore? Or, if I still should use it, how do I compensate the torque for the anti-seize?? At this point I'm a little upset that I stipped the stud. I guess it finally happened to me that I stipped a bolt/stud. I guess this is the moment I should learn from. But what am I supposed to learn??

Any input is appreciated in my effort in removing the stud and prevent any future mishaps like this. Thanks.







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New Stripped Water Pump Stud [700][1991]
posted by  someone claiming to be Hakan Carlsson  on Thu Jul 5 02:49 CST 2001 >


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