HONDA 4 CYLINDER - CYLINDER HEAD VALVE GUIDE REPLACEMENTSometimes after inspection your Honda cylinder head will need some replacement valve guides. Normally the exhaust valve guides on your Honda cylinder head will wear out faster than your inlet valve guides. Generally we prefer to replace all 16 valve guides once the exhaust valve guides are worn as then there will be no future issues. Characteristics of worn valve guides are list below Failed or bad result on a cylinder leak down test Poor compression