[Wade Congdon]

Originally Posted by lust4speed

Question: With the mains pulled but the timing chain still on, is it possible to lift the rear of the crank far enough away with the rods still attached to fill the anti-rotation holes and install a BOP seal? Never had reason to try it before, and just trying to get around popping out all the pistons.

The short answer is yes. On the 3-inch motors the holes do not need filled. On the 3.25-inch motors we have a new procedure for doing it without pulling the crank that it working very well. The instructions for this can be downloaded at our website where the seal is sold. While the concentricity issue can be a factor, I still maintain these cases are few and far between. I sell and support thousands of seals per year and have very few issues.