Discovery II
GENERAL DATA
04-6
Gudgeon pins
Diameter
23.995 - 24.000 mm (0.9447 - 0.9449 in)
Clearance in piston
0.006 - 0.015 mm (0.00024 - 0.00059 in)
Fit in connecting rod
Press fit
Length
60.00 - 60.50 mm (2.362 - 2.382 in)
Pistons
Type
Solid skirt, elliptical open end with offset gudgeon pin
Material
Aluminium AE413P
Clearance in cylinder bore.
Measured 10 mm (0.4 in) from bottom of skirt, 90
°
to
gudgeon pin.
0.015 - 0.045 mm (0.001 - 0.002 in)
Diameter - Grade A
93.970 - 93.985 mm (3.6996 - 3.7002 in)
Diameter - Grade B
93.986 - 94.001 mm (3.7002 - 3.7008 in)
Piston rings
Type:
2 compression, 1 oil control
⇒
Top compression ring
Barrel faced nitrided steel
⇒
2nd compression ring
Tapered spherical
⇒
Oil control ring
3 piece AE Conoform
Piston ring fitted gap in cylinder bore:
⇒
Top compression ring gap
0.3 - 0.5 mm (0.012 - 0.020 in)
⇒
2nd compression ring gap
0.40 - 0.65 mm (0.016 - 0.026 in)
⇒
Oil control ring gap
0.38 - 1.40 mm (0.015 - 0.055 in)
Piston ring width:
⇒
Top compression ring width
1.21 - 1.23 mm (0.0476 - 0.0484 in)
⇒
2nd compression ring width
1.478 - 1.490 mm (0.0582 - 0.0587 in)
⇒
Oil control ring width
3.00 mm (0.1181 in)
Piston ring to groove clearance:
⇒
1st and 2nd compression rings
0.05 - 0.10 mm (0.002 - 0.004 in)
Camshaft
Bearings
5
Drive
Chain, 9.52 mm (0.3748 in) pitch x 54 pitches
End float
0.075 - 0.25 mm (0.002 - 0.010 in)
Tappets
Type
Hydraulic self adjusting
Outside diameter
21.386 - 21.407 mm (0.8420 - 0.8427 in)