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2D HCS engine Cylinder head Maximum permissible gasket surface distortion 0.15 mm Valve seat angle (inlet and exhaust) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45º Valve seat width (inlet and exhaust) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.18 to 1.75 mm* *The inlet and exhaust valves have special inserts which cannot be recut using conventional tools. Valves - general Inlet Exhaust Valve lift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.86 to 9.26 mm 8.96 to 9.36 mm Valve length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103.7 to 104.4 mm 104.2 to 104.7 mm Valve head diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34.40 to 34.60 mm 28.90 to 29.10 mm Valve stem diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.0 mm 7.0 mm Valve stem-to-guide clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.020 to 0.069 0.046 to 0.095 Pistons and piston rings Piston diameter: Standard 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73.91 to 73.92 mm Standard 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73.92 to 73.93 mm Standard 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73.93 to 73.94 mm Oversize 0.5 mm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74.46 to 74.49 mm Oversize 1.0 mm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74.96 to 74.99 mm Piston-to-cylinder bore clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.015 to 0.050 mm Piston ring end gap - installed: Compression rings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.25 to 0.45 mm Oil control ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.20 to 0.40 mm Ring gap position: Top compression ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Offset 180º from oil control ring gap Second compression ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Offset 90º from oil control ring gap Oil control ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Aligned with gudgeon pin Chapter 2 Part D: Engine removal Camshaft and tappets - removal, inspection and refitting (HCS engine) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Compression test - description and interpretation . . . See Chapter 1 Crankshaft - inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 8 Cylinder head - reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 9 Engine - initial start-up after overhaul . . . . . . . . . . . . . . . . . . . . . . . . 22 4 Engine overhaul - dismantling sequence . . . . . . . . . . . . . . . . . . . . . 7 Engine overhaul - general information . . . . . . . . . . . . . . . . . . . . . . . 2 Engine overhaul - reassembly sequence . . . . . . . . . . . . . . . . . . . . . 18 3 Engine/transmission - removal and refitting (CVH engine) . . . . . . . . 5 Engine/transmission - removal and refitting (Zetec engine) . . . . . . . 6 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Main and big-end bearings - inspection . . . . . . . . . . . . . . . . . . . . . . 17 bearing clearance check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Piston/connecting rod assemblies - removal . . . . . . . . . . . . . . . . . . 12 2D•1 Easy, suitable for Fairly easy, suitable Fairly difficult, Difficult, suitable for Very difficult, Degrees of difficulty Specifications Contents |