HANG UP AND DRIVE!!!
I stopped by the dealership today to see if they had any new info on the "Tacoma Tick." He said they've determined the engine tick is coming from the spark arrestor. Where exactly is the spark arrestor on the 4.0 and more importantly, does this theory make any sense to anyone? After telling me it was the spark arrestor causing the tick, he said they tried to fix it on a couple of other Tacomas with no positive results. He also told me the tick is normal and isn't hurting anything.