Valve Stem Oil Seals
WARNING: This page is about a different car, the 2002 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
Valve stem oil seals are color coded on one end for identification. Exhaust valve stem oil seals are Gray and intake valve stem oil seals are Brown. Lubricate valve stem oil seal with engine oil before installation. Use Valve Stem Oil Seal Installer (09201-41020) to install valve stem oil seal.