Lifter / Lash Adjuster, Valve

Hydraulic Lash Adjuster
Diameter (standard) 16.000-15.988 mm (0.6299-0.6294 inch)
Clearance-to-bore 0.018-0.069 mm (0.000709-0.002717 inch)
Service limit 0.016 mm (1.0006299 inch)
Hydraulic leakdown rate c 5-25 seconds
Collapsed lash adjuster gap - desired 0.45-0.85 mm (0.0177-0.0334 inch)

c Time necessary for Plunger to leak down 1.6 mm of travel with 22.2 N force and leak down fluid in tappet.