No, that's actually the hole for the cam tensioner bolt.
What happend was one of my cylinders was no good, and out of the 2 parts cylinders I bought, only 1 was good. They ended up both being either fronts, or backs(I forget). the only difference between the 2 is that the holes for the cam tensioner were on the opposite side. I drilled a hole where I needed it, but the left over hole was still there.
Last edited by corner27; 11-21-2012 at 08:56 AM.