Rover 820 - Page 68

1380 Rover 800 Series Remake
2C
4-cylinder engines
Cylinder head
Valve seat angle (inlet and exhaust) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45º
Valve seat width (inlet and exhaust) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 to 2.0 mm
Valves Inlet Exhaust
Valve stem diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.09 to 7.10 mm 7.07 to 7.09 mm
Valve head diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31.7 to 31.9 mm 29.2 to 29.4 mm
Valve stem-to-guide clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.04 to 0.06 mm 0.06 to 0.07 mm
Valve spring free length:
“M” series engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41.0 mm
“T” series engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46.2 mm
Pistons and piston rings
Piston-to-cylinder bore clearance:
“M” series engines:
Top of skirt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.08 to 0.10 mm
Bottom of skirt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.04 to 0.05 mm
“T” series engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.01 to 0.03 mm
Piston ring end gap - installed:
“M” series engines:
Compression rings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.30 to 0.50 mm
Oil control ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.25 to 0.50 mm
“T” series engines:
Top compression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.25 to 0.35 mm
2nd compression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.30 to 0.50 mm
Oil control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.30 to 0.50 mm
Piston ring-to-groove clearance:
Top compression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.06 to 0.09 mm
2nd compression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.05 to 0.07 mm
Chapter 2 Part C: Engine removal
and general engine overhaul procedures
Crankshaft - inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Crankshaft - refitting and main bearing running clearance check . . 21
Crankshaft (4-cylinder engine) - removal . . . . . . . . . . . . . . . . . . . . . 13
Crankshaft (V6 engine) - removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Cylinder block/crankcase - cleaning and inspection . . . . . . . . . . . . 15
Cylinder head - reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Cylinder head (4-cylinder engine) - dismantling . . . . . . . . . . . . . . . . 7
Cylinder head and rocker gear (V6 engine) - dismantling . . . . . . . . . 8
Cylinder head, rocker gear and valve assemblies - cleaning
and inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Engine - initial start-up after overhaul . . . . . . . . . . . . . . . . . . . . . . . . 23
Engine overhaul - dismantling sequence . . . . . . . . . . . . . . . . . . . . . 6
Engine overhaul - general information . . . . . . . . . . . . . . . . . . . . . . . 2
Engine overhaul - reassembly sequence . . . . . . . . . . . . . . . . . . . . . 19
Engine removal - methods and precautions . . . . . . . . . . . . . . . . . . . 3
Engine/transmission (4-cylinder engine) - removal, separation
and refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Engine/transmission (V6 engine) - removal, separation and refitting 5
General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Main and big-end bearings - inspection . . . . . . . . . . . . . . . . . . . . . . 18
Piston/connecting rod assemblies - inspection . . . . . . . . . . . . . . . . 16
Piston/connecting rod assemblies - refitting and big-end bearing
running clearance check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Piston/connecting rod assemblies (4-cylinder engine) - removal . . . 11
Piston/connecting rod assemblies (V6 engine) - removal . . . . . . . . . 12
Piston rings - refitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2C•1
Specifications
Contents
Easy, suitable for
novice with little
experience
Fairly easy, suitable
for beginner with
some experience
Fairly difficult,
suitable for competent
DIY mechanic
Difficult, suitable for
experienced DIY
mechanic
Very difficult,
suitable for expert DIY
or professional
Degrees of difficulty
5
4
3
2
1