I have a 2004 HCH MT with 115000 miles. Just adjusted the valves myself at 110000. They adjust just like any other car with solid lifters. If you have ever adjusted the valves on any other car, you will not have any trouble adjusting the HCH valves. In fact it is easier, each cylinder is numbered on the cam sprocket. Just turn the engine over until the cylinder number you want to adjust is on the top of the sprocket then adjust that cylinder. Turn the engine over again to set the next number is on top etc.