Lifter / Lash Adjuster, Valve

Hydraulic Valve Tappet
Diameter (std.) 15.988 - 16 mm (0.6290-0.6294 in.)
Clearance to bore 0.018 - 0.069 mm (0.0007 - 0.0027 in.)
Service limit 0.016 mm (0.0006 in.)
Hydraulic leakdown rate a 5 - 25 seconds
Collapsed valve tappet gap desired 0.50 - 1.11 mm (0.019 - 0.043 in.)

a Time required for plunger to leak down 1.6 mm of travel with 222 N force and leak down fluid in tappet.