intake manifold stud?

[dmclean]

Does anyone know what the stud marked 16 in the diagram below should be torqued to. There is a 10mm hex on the stud and then a 15mm nut to hold the coil module bracket. The torque values for the stud and the nut should be different. I had a huge problem trying to un-seize the 15mm nut. A lot of heat and quench the stud and it finally broke free. I also have the same problem with stud holding the PCV tube bracket on the passenger side except the 15mm nut turns with the stud and the tube bracket so I can't remove it. I have been soaking with ATF and Acetone. Still no luck. I can't get a 10mm wrench on the stud hex and even if I could, I'd probably round the hex. Any tricks would be appreciated.

 

[turbodave23101]

Take an old 10mm wrench and grind it thin enough to hold the stud under the tab on the pipe. Use an impact to loosen the nut


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[dmclean]

Thanks Turbo Dave, I putzed around with it and broke the mounting tab for the PCV pipes and got the stud out. The hex on the stud was bigger than the 10mm I thought it was and not the same same size as the other studs that hold the ignition module bracket. Go figure. One more learning thing. I still have to figure out what to torque the studs into the intake manifold (plenum). I found a product called No Ox ID Special A and plan to coat the upper threads of the studs and use some anti-sieze on the lower threads and that should fix the problem. Now to see if I can get the fuel rail and injectors out in one piece. Wish me luck.