32 ENGINE2.2LDICOR l Install matching size valve guide in cylinder head using drift (Part No.2868 5890 06 05) and spacer (Part No. 2653 5890 06 01). (Fig. 64) l Fit Valve guide oil seals Fig. 64 Valve Seat l Check valve seat height with respect to cylinder head mating surface. Replace valve seat inserts if they are worn out beyond specified limit. l Cut exhaust and inlet valve seats with a general 45 deg. cutter. (Fig. 65) Fig. 65 NOTE VALVESEATMUSTBEABSOLUTELYFAULTLESSAND WITHOUTANYCHATTERMARKS l If necessary lap the valve seats to a smooth and even finish by using suitable hand pump grinder or a lapping paste and valve itself. l Smear valve seat with carbon blue. Install valve in guide and turn it slowly under axial pressure. l CONTACTLINEONVALVESEATMUSTBEAROUND ENTIRECIRCUMFERENCEATEQUALWIDTH l Distance between narrow diameter of valve face to contact line should be minimum 0.5 mm. (Fig.66) l Check for leakages through valve seat by pouring gasoline on valve head. Gasoline must not seep past valve seat. Fig. 66
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