Pic. 6.25. Elements of the gas distribution mechanism:
1 - Root covers of the camshaft; 2 - Nut; 3 - Camshaft; 4 - Hydraulic compensator; 5 - Crackers; 6 - Upper spring plate; 7 - Valve spring; 8 - Valve stem seal; 9 - Valve guide sleeve; 10 - Camshaft oil seal; 11 - Cylinder head; 12 - Valves; 13 - Whirlpool (only on 1Y engine); 14 - Lower cone seal.
Axial clearance check
Check of an axial backlash of a camshaft by means of the indicator is shown on fig. 6.26.
Permissible axial clearance: 0.15 mm.
VW 387 - Indicator bracket.
Valve sizes
Valve dimensions are shown in fig. 6.27.
Valve sizes for AEY, AFN, AHV, AHU, AKW, ALE engines are given in Table 6.4 a, for 1Y engines - in Table 6.4 b.
Table 6.4 a. Dimensions of valves for engines AEY, AFN, AHV, AHU, AKW, ALE
Table 6.4 b. Engine valve dimensions 1Y
Camshaft identification
Main cam diameter: 38mm.
The camshaft identification is stamped between the intake and exhaust cams.
Camshaft identification is shown in fig. 6.28.
Valve timing at 1 mm valve lift
Visitor comments