Getting the Best Results When Cutting Valve Guides
If you've ever pulled a cylinder head off a high-mileage engine, you know that cutting valve guides is often the only way to get things back to factory spec—or better. It's one of those jobs that looks simple enough on paper, but once you're standing over the workbench with a reamer or a seat-and-guide machine, you realize just how much can go wrong if you aren't paying attention. We aren't just talking about making a hole bigger; we're talking about the fundamental geometry that keeps your engine from eating itself. ...