ENGINE - 4.6 V8 (page 2 of 3)

GENERAL SPECIFICATION DATA

5

INFORMATION

Piston rings
Number of compression rings

2

..........................................

Number of oil control rings

1

...............................................

No 1 compression ring

Nitrided steel barrel faced

.....................................................

No 2 compression ring

Tapered spherical barrel marked ’TOP’

.....................................................

Width of compression rings

Bottom

1.478 - 1.49 mm

.....................................................................

0.0582 - 0.0587 in

Top

Up to 99MY

1.21 - 1.23 mm

....................................................

0.0476 - 0.0484 in

From 99MY

1.17 - 1.19 mm

.....................................................

0.0461 - 0.0479 in

Compression ring gap

Bottom

0.40 - 0.65 mm

.....................................................................

0.0157 - 0.0256 in

Top

0.3 - 0.5 mm

..........................................................................

0.0118 - 0.0197 in

Oil control ring type

Up to 99MY

Aclonoform

.............................................................

From 99MY

3 Piece Aeconoform

.............................................................

Oil control ring width

3.0 mm

.........................................................

0.1181 in

Oil control ring rail gap

0.38-1.40 mm

.....................................................

0.0150 - 0.0551 in

Camshaft
Location

Central

...........................................................................

Bearings

Non serviceable

...........................................................................

Number of bearings

5

..........................................................

Drive

Chain 9.52 mm pitch x 54 pitches.

.................................................................................

Camshaft end float

Up to 99MY

0.076 - 0.355 mm

.............................................................

0.003 - 0.014 in

From 99MY

0.075 - 0.350 mm

.............................................................

0.002 - 0.013 in

Tappets

Hydraulic self-adjusting

...........................................................................

Valves
Length

Inlet

116.59 - 117.35 mm

.........................................................................

4.590 - 4.620 in

Exhaust

116.59 - 117.35 mm

...................................................................

4.590 - 4.620 in

Seat angle

Up to 99MY

From 99MY

Inlet

46

°

- 46

°

25’

.........................................................................

45

°

- 45

°

30’

Exhaust

46

°

- 46

°

25’

...................................................................

45

°

- 45

°

30’

Head diameter

Inlet

39.75 - 40.00 mm

.........................................................................

1.565 - 1.575 in

Exhaust

34.227 - 34.48 mm

...................................................................

1.3475 - 1.3575 in

Stem diameter

Inlet

8.664 - 8.679 mm

.........................................................................

0.3411 - 0.3417 in

Exhaust

8.651 - 8.666 mm

...................................................................

0.3406 - 0.3412 in

Stem to guide clearance

Inlet

0.025 - 0.066 mm

.........................................................................

0.0010 - 0.0026 in

Exhaust

0.038 - 0.078 mm

...................................................................

0.0015 - 0.0031 in

Valve lift (inlet and exhaust)

9.94 mm

.............................................

0.3913 in

Valve spring length fitted

Up to 99MY

40.40 mm (1.59 in) at pressure of 29.5 kg (65 lb)

.............................................................

From 99MY

40.93 mm (1.61 in) at pressure of 29.5 kg (65 lb)

.............................................................