I am in the process of rebuilding an A4 I bought on EBay. I have completed the disassembly of the engine. About half of the studs came out when I removed the head, the other half I removed with a cheap stud puller. The stud puller caused a small amount of damage to the center section of the studs (the area with no threads). Do I need to replace the studs with damage to the center, non threaded part of the stud? Also, is there a way to get the nut off of the stud without causing any damage to the stud?
Head/Manifold studs
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Tim,
Some damage to the center part of the studs doesn't matter - just file off any raised metal. The strength of the studs is related to the minor area at the root of the threads. The middle portion of the studs has a lot more metal, and removal of some will have no affect.
As for removing the nuts, some heat and PB Blaster should do the trick. Try putting them into a small soup can with some kerosene and let them soak a few days.
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If it was me and I was rebuilding an old engine like this, why would I notreplace all the studs/nuts/bolts?
But then again, it is always easy to spend other people's money!
I would be sure to carefully examine the studs and make sure they have a sufficient amount of threads left..particularly the coarse end which sees corrosion and wear from whatever cooling liquid is flowing thru the block all those years.-Shawn
"Holiday" - '89 Alura 35 #109
"Twice Around" - '77 C-30, #511 with original A-4 & MMI manifold - SOLD! (no longer a two boat owner!!)
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