2.0 liter Mpi engine (Discovery 1)

• Type - 20 T4-16 with overhead camshaft
• The cylinder arrangement is 4 in a row
• Cylinder diameter: 84.45 mm
• Piston stroke: 89.00 mm
• Working volume - 1994 cm³
• The firing order of the cylinders is 1-3-4-2
• Compression ratio: 10:1

Oil pump

• The gap between the rotor and the housing is 0.05-0.10 mm
• The engagement gap is 0.025-0.12 mm
• End gap - 0.03-0.08 mm

Pressure reducing valve

The length of the spring in a free state is 42.0 mm

Cooling system

• Start of opening of the thermostat - 82-86°C
• Full thermostat opening - 88°C
• Full stroke - 9 mm

Camshaft

• Axial clearance of the camshaft is 0.06-0.25 mm
• Bearing clearance: 0.060-0.094 mm
• Maximum clearance: 0.15 mm

Timing belt tensioner

The length of the spring in a free state is 57.5-58.5 mm

Cylinder head

• Longitudinal deformation - maximum - 0.1 mm
• Transverse deformation - maximum - 0.1 mm
• Diagonal deformation - maximum - 0.1 mm
• Cylinder head height: 135.0-135.1 mm

Valve springs

• Free length - 46.25 mm
• Installation length: 37.0 mm
• Force at installation length - 255±12 N
• Full valve lift force: 560±22.5 N

Valves

Valve stem diameter:

• Inlet - 7.09-7.10 mm
• Issue - 7.07- 7.09 mm

Valve disc diameter:

• Intake 31.7-31.95 mm
• Release 29.2-29.43 mm

Maximum valve installation height: 43.4 mm

Guide clearance:

• Inlet - 0.04-0.06 mm
• Limit value: 0.09 mm
• Release - 0.06-0.07 mm
• Limit value: 0.10 mm

Valve guide bushings

Inner diameter - inlet and outlet - 7.137-7.162 mm

Overall length:

• Inlet - 48.5 mm
• Release - 52.9 mm

Valve seats

• The angle of the shut-off chamfer - inlet and outlet - is 45 degrees.
• The width of the shut-off chamfer - inlet and outlet - 1.5-2.0 mm
• Valve bevel angle: inlet and outlet - 45°-45° 15'

Crankshaft

• Axial clearance: 0.03-0.2 mm
• Thrust bearing thickness: 2.31-2.36 mm
• Main journal diameter: 54.005-54.026 mm
• Maximum out-of-roundness: 0.010 mm
• Main bearing clearance: 0.03-0.07 mm
• The diameter of the connecting rod lower head journal is 47.648-47.661 mm
• Maximum out-of-roundness: 0.010 mm
• The clearance in the connecting rod bearing is 0.04-0.08 mm

Piston rings

Piston groove clearance:

• Upper compression - 0.06-0.09 mm
• Second compression - 0.05-0.07 mm
• Oil scraper with expander - 0.03-0.05 mm

Gap in the lock:

• Upper compression - 0.25-0.35 mm
• Second compression - 0.3-0.5 mm
• Oil scraper - 0.38-1.14 mm

Pistons

Diameter:

• Size A - 84.409-84.422 mm
• Size B - 84.423-84.436 mm

The gap between the cylinder is 0.01-0.03 mm

Cylinder diameter:

• Size A - 84.442-84.455 mm
• Size B - 84.456-84.469 mm