Time was when a valve job was done with some valve-grinding compound and a vacuum cup on a stick. But no more. Today's high performance engines require the same machining precision in the valves that ...

Nissan Motor Company has revealed that it has adopted cold spray technology in the production of valve seats, claiming to be the first company to use the process in automotive engines. The Japanese ...

Valve seat wear or "sinkage" or "recession" was observed in eight engines run on unleaded fuel. Detailed studies of valve seat wear were undertaken in a 302 cu in. V-8 engine run for 10-1/4 hr at WOT ...

The purpose of this research was to predict the amount of wear on exhaust valve seats in durability testing of gasoline engines. Through the rig wear test, a prediction formula was constructed with ...