A Valve Job is simply a re-cutting or “re-facing” of the valve seats, and the valves. Valve jobs are necessary when the seats and valve are worn. And, there is no longer a proper seal, between the seat and the valve.

Valve Job – Why Would You Need One – Causes – What To Expect
You may have heard the term, valve job, because older engines frequently needed their valves reconditioned. You rarely hear about, valve problems or valve jobs in today’s engines. Because, modern (OHC) engines, have fewer parts […]