possible rethread of block need informed advice!!
Thread Starter
FOR ME TO POOP ON!
Joined: Aug 2002
Posts: 52
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From: Plano, TX
possible rethread of block need informed advice!!
Here is a brief backgound on my situation to date: http://www.g2ic.com/forums/showthrea...threadid=36774
I have found a machine shop through carchitect that hash rethreaded blocks before- they said they have very satisfied customers-mostly being high revving imports- many FI cars. The cost is $175 and the turnaround is 2 weeks- not that it takes them 2 weeks to do the work they're just currently backed up.
The process involves overdrilling the thread hole for the head studs and inserting a steel insert and threading the steel insert to match the thread on the b18c ARP head studs. The biggest advantages I see in this method is A) its made of steel, not aluminum and should have a better tensile strength and b) the new thread made will have a larger surface cohesion to the ARP head studs- which if installed in a block with normal threads dthe studs do not thread all the way through- you dont use the entire thread to connect to the block. The thing I am worried about is the cohesion between the steel insert and the aluminum block. The only reason I am worried about this is due to ignorance- I am weak on my mettalurgy knowlledge and could use some help from some brains out there who would know how well this would hold together. I'm sure if it didnt hold, then this machine shop would not use it, I would just like to know for my own piece of mind that I'm not "playing with fire". If I get this done, I will leave them a disposable camera and ask if they can snap some pics of the process and will post them up if possible.
I appreciate you guys' help
:rockon:
I have found a machine shop through carchitect that hash rethreaded blocks before- they said they have very satisfied customers-mostly being high revving imports- many FI cars. The cost is $175 and the turnaround is 2 weeks- not that it takes them 2 weeks to do the work they're just currently backed up.
The process involves overdrilling the thread hole for the head studs and inserting a steel insert and threading the steel insert to match the thread on the b18c ARP head studs. The biggest advantages I see in this method is A) its made of steel, not aluminum and should have a better tensile strength and b) the new thread made will have a larger surface cohesion to the ARP head studs- which if installed in a block with normal threads dthe studs do not thread all the way through- you dont use the entire thread to connect to the block. The thing I am worried about is the cohesion between the steel insert and the aluminum block. The only reason I am worried about this is due to ignorance- I am weak on my mettalurgy knowlledge and could use some help from some brains out there who would know how well this would hold together. I'm sure if it didnt hold, then this machine shop would not use it, I would just like to know for my own piece of mind that I'm not "playing with fire". If I get this done, I will leave them a disposable camera and ask if they can snap some pics of the process and will post them up if possible.
I appreciate you guys' help
:rockon: