ENGINE
Pistons - inspection
Gudgeon pins - inspection
1.
2.
Clean carbon from pistons.
Inspect pistons for distortion, cracks and
burning.
NOTE: Gudgeon pins are only supplied as
an assembly with replacement pistons.
1.
2.
Check gudgeon pins for signs of wear and
overheating.
Check clearance of gudgeon pin in piston.
Gudgeon pin to piston clearance = 0.006 to
0.015
mm (0.0002 to 0.0006 in).
3.
Check overall dimensions of gudgeon pin.
Overall length = 60.00 to 60.50 mm (2.35 to 2.4
in).
Diameter - measured at each end and centre
of pin = 23.995 to 24.00 mm (0.94 to 0.95 in).
3.
4.
Measure and record piston diameter at 90° to
gudgeon pin axis and 10 mm (0.4 in) from
bottom of skirt.
Check gudgeon pin bore in piston for signs of
wear and overheating.
NOTE: Pistons fitted on production are
graded ’A’ or ’B,’ the grade letter is
stamped on the piston crown.
Production piston diameter:
Grade A = 93.970 to 93.985 mm (3.700 to 3.7002 in)
Grade B = 93.986 to 94.00 mm (3.7003 to 3.701 in)
Grade B pistons are supplied as service
replacements. Worn cylinder liners fitted with grade
’A’ pistons may be honed to accept grade ’B’
pistons provided that specified cylinder bore and
ovality limits are maintained.
CAUTION: Ensure replacement pistons are
correct for the compression ratio of the
engine. The compression ratio will be
found on the cylinder block above the engine
serial number. Ensure that replacement
connecting rods are correct length for engine
being overhauled.
Connecting rod length between centres:
4.0
4.6
litre = 155.12 to 155.22 mm (6.10 to 6.11 in)
litre = 149.68 to 149.78 mm (5.89 to 5.91 in)
OVERHAUL
29
| Categories | Land Rover, Land Rover Defender, Range Rover |
|---|---|
| Tags | Land Rover |
| Model Year | 1999 |
| Download File |
|
| Product Name | Range Rover 4.0 & 4.6 Litre, Defender V8i |
| Product Brand | Land Rover |
| Document File Type | |
| Publisher | landrover.com |
| Wikipedia's Page | http://en.wikipedia.org/wiki/Land_Rover |
| Copyright | Attribution Non-commercial |
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