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My Enclave jumped time at 102310 miles! I'm in the middle of replacing my timing chains & I need to clean up the crankshaft bolt threads. Does anyone know the size & thread pitch of the bolt that holds the harmonic balancer on? Thanks!
 

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it is not the size or the thread pitch that will be the problem. It will be the material that the Crank is made out of.

High speed steel (HSS) has a tough time cutting through the crank. You can try 18mm x 1.5 tap but if you do. DO NOT GET CRAFTSMAN. You MUST get a minimum of HSS Taps!!! If not you WILL break the tap and then you will be **** up a creek without a paddle.
 
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