Discovery II
GENERAL DATA
04-2
Lubrication
Type
Wet sump, pressure fed
Pump type
Eccentric rotor, crankshaft driven integral with stiffener plate.
Filter type:
⇒
Primary
Centrifuge filter
⇒
Secondary
Disposable canister with full flow by-pass
Pressure at idle (Cold)
3.0 bar (43.5 lbf.in
2
)
Pressure at 3500 rev/min (Hot)
1.5-3.0 bar (21.75-43.5 lbf.in
2
)
Relief valve opening pressure
4.0 bar (58 lbf.in
2
)
Low oil pressure switch opening pressure
0.2-0.6 bar (3.0-8.8 lbf.in
2
)
Crankshaft
Main journal diameter
61.9875-62.0125 mm (2.4404-2.4414 in)
Crankpin journal diameter
53.99-54.01 mm (2.125-2.131 in)
End float
0.020 - 0.250 mm (0.0008 - 0.0098 in)
Main bearings
Quantity
6 (5 main, 1 thrust)
Pistons
Type
Graphite compound skirt with combustion chamber in crown
Clearance in cylinder bore.
Measured at bottom of skirt, 90
°
to gudgeon pin
0.172-0.206 mm (0.007-0.008 in)
Diameter
(Measured at right angles to gudgeon pin and 40.0 mm
(1.5 in) from bottom of skirt)
84.270-85.254 mm (3.321-3.361 in)
Gudgeon pins
Fully floating, offset towards piston thrust side
Piston rings
Type:
2 compression, 1 oil control
⇒
Upper compression ring
Barrel edge, chrome plated
⇒
Lower compression ring
Taper faced
⇒
Oil control ring
Bevelled ring with spring
New ring to groove clearance:
⇒
Upper compression
Not measured
⇒
Lower compression
0.050-0.082 mm (0.002-0.003 in)
⇒
Oil control
0.050-0.082 mm (0.002-0.003 in)
Piston ring fitted gap in cylinder bore:
⇒
Upper compression
0.30-0.45 mm (0.0118-0.0177 in)
⇒
Lower compression
0.40-0.60 mm (0.0157-0.0236 in)
⇒
Oil control
0.25-0.40 mm (0.0098-0.0157 in)
Camshaft
Bearings
6
Drive
Duplex chain
End float
0.06-0.16 mm (0.002-0.006 in)
Tappets
Type
Hydraulic lash adjusters with followers
