300Tdi Discovery
GENERAL SPECIFICATION DATA
23
INFORMATION
Valves
Valve stem diameter:
Inlet
7.09 to 7.10 mm
.........................................................................
Exhaust
7.07 to 7.09 mm
...................................................................
Valve head diameter:
Inlet
31.7 to 31.95 mm
.........................................................................
Exhaust
29.2 to 29.43 mm
...................................................................
Valve installed height - maximum
43.4 mm
....................................
Valve stem to guide clearance:
Inlet
0.04 to 0.06 mm
.........................................................................
Service limit
0.09 mm
.............................................................
Exhaust
0.06 to 0.07 mm
...................................................................
Service limit
0.10 mm
.............................................................
Valve guides
Internal diameter - Inlet and Exhaust
7.137 to 7.162 mm
...............................
Overall length:
Inlet
48.5 mm
.........................................................................
Exhaust
52.9 mm
...................................................................
Valve seats
Valve seat angle - Inlet and Exhaust
45
°
................................
Valve seat width - Inlet and Exhaust
1.5 to 2.0 mm
................................
Valve face angle:
Inlet and Exhaust
45
°
to 45
°
15’
.............................................................
Crankshaft
End-float
0.03 to 0.2 mm
...........................................................................
Thrust washer halves thickness
2.31 to 2.36 mm
.......................................
Main journal diameter
54.005 to 54.026 mm
.......................................................
Maximum out of round
0.010 mm
............................................
Main bearing diametric clearance
0.03 to 0.07 mm
....................................
Big-end journal diameter
47.648 to 47.661 mm
..................................................
Maximum out of round
0.010 mm
............................................
Big-end bearing diametric clearance
0.04 to 0.08 mm
................................
Piston rings
New ring to groove clearance:
Top compression
0.06 to 0.09 mm
.............................................................
2nd compression
0.05 to 0.07 mm
..............................................................
Oil control rails - expander fitted
0.03 to 0.05 mm
......................................
Ring fitted gap:
Top compression
0.25 to 0.35 mm
.............................................................
2nd compression
0.3 to 0.5 mm
..............................................................
Oil control rails
0.38 to 1.14 mm
.................................................................
Pistons
Piston diameter:
Grade A
84.409 to 84.422 mm
...................................................................
Grade B
84.423 to 84.436 mm
...................................................................
Clearance in bore
0.01 to 0.03 mm
.............................................................
Cylinder bore
Grade A
84.442 to 84.455 mm
...................................................................
Grade B
84.456 to 84.469 mm
...................................................................
