Yes, it is possible to resurface a head without removing the valves. The process of resurfacing a head without removing the valves involves using specialized equipment that can accurately and safely grind down the surface of the cylinder head while still keeping all components in place. To begin, an abrasive disc is used to remove any burrs or imperfections on the surface and then diamond-tipped cutters are utilized to create an even, flat surface. A depth gauge is also used to ensure that no material has been removed from areas near valves or other critical components. Lastly, a high-grade lapping compound may be applied for extra protection against corrosion and wear. This entire process requires great attention to detail as even minor mistakes could result in major damage down the line so it’s important to have an experienced technician perform this task correctly!