We all have brain farts. All of us. And we all have a lot of extra weight to carry recently. Good news is that you caught it. Your subconscious was actually looking out for you. Good catch.@GLTHFJ60 Like you said, sure glad I discovered it now! I realized it when I put the water pump on. The tab was in the way, at the time I didn't think much of it, and cut it out of the way with a chisel. Then I started thinking about it and started looking at old pictures of my install. I don't know how I put it on backwards. I've done plenty of HG's before, just not on a 2F, but regardless... stupid is, stupid does. I had quite a bit on my mind when I installed it. Now I'm just waiting for the new gasket to arrive from the Toyota man.