I bought a cummins brand barring tool from Geno's to adjust timing on my '95 2500 and after removing the plug in the flywheel housing, the tool will not fit in the hole. https://www.turbodieselregister.com/images/smilies/cussing.gif I made sure the hole is clean, but the tool only goes in the depth of the teeth, then gets real tight. Cummins part # 3824591, any ideas?