This TSB applies to engines with the engine numbers 2GR 7956809 that have a “7” in the third position. If the engine has an 8, the update has already taken place at the factory. Some engines may have “M” in the third position; the tip also applies to these vehicles.
Toyota vehicles equipped with the 2GR-FKS 3.5L, 24-valve DOHC V6 may exhibit oil leaks from the cam sensor bolt holes. The sensors are in the valley of the engine.
Toyota recommends replacing the camshaft housings head gaskets and valve cover gaskets with updated parts.
Courtesy of Mitchell 1.