Checking valve guide for wear F110111 F110140 L Note: To simplify driving out, heat the cylinder head to 100 °C (212 °F). Use temperature measuring device, BMW No. 00 1 900 , to check the tempera- ture. • Insert new valve from combustion chamber side into valve guide until it reaches the valve stem seal. • Using dial gauge, BMW No. 00 2 510 , posi- tioned vertically on the valve axis, measure max- imum tilt clearance across the camshaft axis. Tilt clearance: Max. tilt clearance ....................... 0.4 mm (0.016 in) Inside diameter of valve guide..........................max. 5.080 mm (0.2 in) • Use drift, BMW No. 11 0 571 , to drive out the valve guide toward the combustion chamber.
e Attention: If the valve guide bore in the cylinder head is worn, the cylinder head must be replaced. 11 12 591 Removing valve guide 2 F110121 e Attention: Do not damage sliding surfaces of bucket tappets: risk of jamming. • Pull off valve stem seal (1) with pliers, BMW No. 11 1 250 . • Remove valve spring support (2) from cylinder head. 11.30 11 0 571 11 0 571 00 2 51 0 1