Q45 V8-4.5L (VK45DE) (2002)
Valve Spring: Service and Repair
Valve Spring - Dimensions & Pressure Load
CAUTION: When installing camshafts, chain tensioners, oil seals, or other sliding parts, lubricate contacting surface with new engine oil.
Apply new engine oil to threads and seat surface when installing cylinder head, camshaft sprocket, crankshaft pulley, and camshaft bracket.
Attach tags to valve lifters so as not to mix them up.
CYLINDER HEAD ASSEMBLY
VALVE SPRING DIMENSIONS AND VALVE SPRING PRESSURE LOAD
Check valve spring pressure at specified spring height.
STANDARD:
Free height ................................................................................................................................................. 51.28 - 51.48 mm (2.0189 - 2.0268 inch)
Installation height ..................................................................................................................................................................... 33.8 mm (1.331 inch)
Installation load ......................................................................................................................................... 166 - 168 N (16.9 - 19.2 kg, 37 - 42 lbs.)
Height during valve open ........................................................................................................................................................ 24.4 mm ((0.961 inch)
Load with valve open ............................................................................................................................. 291 - 329 mm (29.7 - 33.6 kg, 65 - 74 lbs.)