Valve Dimensions
WARNING: This page is about a different car, the 2002 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.
Check dimensions of each valve. Refer to Valve .
Valve head wear limit: 0.5 mm (0.020 in)
Valve stem tip grinding allowance: 0.2 mm (0.008 in)