TUTORIAL how to grind valves and valve seats - YouTube
Jun 23, 2007· Need to report the video?,EASY, HOW I LAPP & GRIND VALVES. THEY DONT TEACH THIS TRICK IN SCHOOL, ONLY OLDSKOOL.,Cylinder Head Valve Lapping Land Rover Engine - Duration: 5:21.Do you need to lap brand new valves with new seats,,Definitely lap the valves and make sure you mark or number each valve so it can be fitted to it's matched seat. With a three angle valve job the seats will most likely have been cut to widths of around .060" for the inlets and .080" for the exhaust.Lapping New Valves - Help - Hot Rod Forum : Hotrodders,,Nov 10, 2007· Assuming the new valves I buy are exactly the same size and length, I would assume the valve seat in the head and the valve surface may be slightly different right? Do the new valves require lapping? Is this something I can do myself or best left for a machine shop.