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Valvetrain, servicing Page 1 of 51 15 32 Valvetrain, servicing Note Cylinder heads with small cracks between the valve seats that are less than 0.3 mm 0.012 in. wide and/or between one valve seat and only the first 4 threads of the spark plug thread, can continue to be used without reduced service life. Always replace gaskets, seals and O rings. CAUTION After installing the camshafts, the engine must not be started for approx. 30 minutes. The hydraulic valve lifters have to settle otherwise valves will strike the pistons . After installing the valvetrain and lifters, carefully rotate the crankshaft by hand at least 2 full revolutions before starting to be sure that valves do not strike the pistons. http //127.0.0.1 8080/audi/servlet/Display action Goto type repair id AUDI.B5.GE02.15.3 11/18/2002 Valvetrain, servicing Page 2 of 51 15 33 1 Bolt 65 Nm 48 ft lb Use 3036 retainer when loosening or tightening 2 Camshaft gear For exhaust camshaft Verify correct installation position thin rib of camshaft gear points forward and TDC Cyl. 1 marking is visible from front Page 15 45 3 Oil seal For exhaust camshaft Always replace Page 15 42 4 Cylinder head Note Page 15 32 Check valve guides, reface valve seats Page 15 66 Bearing cap bushings must be installed in cylinder head Seal contact surfaces Page 15 9 , Fig. 3 and Fig4. Reface valve seats Page 15 71 5 Valve guide http //127.0.0.1 8080/audi/servlet/Display action Goto type repair id AUDI.B5.GE02.15.3 11/18/2002 Valvetrain, servicing Page 3 of 51 Check Page 15 66 Replace Page 15 67 http //127.0.0.1 8080/audi/servlet/Display action Goto type repair id AUDI.B5.GE02.15.3 11/18/2002 Valvetrain, servicing Page 4 of 51 15 34 6 Valve stem oil seal Replace Page 15 62 7 Valve spring Removing and installing Page 15 62 8 Valve spring retainer 9 Valve ke