IMS Chain tenionser thread pitch size?

[spdrcr21]

I bought a plug tap (M27x2.0) from McMaster-Carr as blue62/JFP in PA suggested and chased the threads in the block. It quite some time clean up the threads, clean out metal residue, and use a diagnostic camera to make sure everything was clean. After doing this I was able to thread in and torque the IMS tensioner to spec (59 ft-lbs). Thank you all for your assistance. I am grateful!