Cylinder Head - Rebuild (2-02) Section 2 - Cylinder Head - Group 02 M11 Page 2-14 Measure the thickness of the cylinder head. Cylinder Head Thickness mm in 99.24 MIN 3.907 100.25 MAX 3.947 Measure the valve spring free height. Valve Spring Free Height (A) mm in 103.30 Nominal 4.0669 Use valve spring tester, Part No. 3375182, to measure the valve spring load at the valve spring working height. Valve Spring Load at 71.48 mm [2.8142 in] N lbf 1252 MIN 281 1584 MAX 356 If the valve spring load for the working height is less than the minimum specified, the valve spring must be replaced. Visually inspect the valve spring retainers and valve spring guides for damage or worn areas.
Discard damaged and worn parts.