Land Rover Defender V8i Workshop Supplement Rover Manual

4.0 V8i
1
SPECIFICATIONS, TORQUE TORQUE VALUES
Engine V8i Nm lbf.ft)
Crankshaft pulley bolt 270....................................................... 200
Camshaft gear bolt 58........................................................... 43
Timing cover / coolant pump bolts*** 22............................... 16
Rocker cover to cylinder head 8.......................................... 6
Rocker shaft bracket to cylinder head 38.............................. 28
Spark plug...

12ENGINE
2
SPECIFICATIONS, TORQUE
NOTE: The following torque values are for screws and bolts not specified in the previous table.
METRIC Nm lbf.ft
M5 6........................................................................... 5
M6 9........................................................................... 7
M8 25........................................................................... 18
M10 45......................................................................... 33
M12...

17 - EMISSION CONTROL
CONTENTS
Page
DESCRIPTION AND OPERATION
EMISSION CONTROL 1.........................................................................................
EXHAUST SYSTEM 2.............................................................................................
EVAPORATIVE EMISSION CONTROL SYSTEM 4...............................................
FAULT DIAGNOSIS
TESTING EVAPORATIVE EMISSION CONTROL 1..............................................
REPAIR
EVAP CANISTER AND PURGE CONTROL...

EMISSION CONTROL
1
DESCRIPTION AND OPERATION EMISSION CONTROL
Three systems are used to control the vehicle
atmospheric emissions, these are:
- Engine crankcase fume emissions.
- Fuel tank evaporative emissions
- Engine exhaust gas emissions.
Crankcase ventilation system
The crankcase ventilation system, which is an integral
part of the air supply to the engine combustion
chambers, is often overlooked when diagnosing
problems associated with engine performance. A
blocked ventilation pipe or excessive air...

17EMISSION CONTROL
2
DESCRIPTION AND OPERATION EXHAUST SYSTEM
1.Manifold to front pipe connection.
2.Oxygen sensor.
3.Front silencer support bracket.
4.Front pipe to silencer joint.
5.Silencer rear support bracket.
6.Rear silencer support bracket. 

EMISSION CONTROL
3
DESCRIPTION AND OPERATION Exhaust emission control.
The multiport Sequential Fuel injection (SFi) system
provides accurately metered quantities of fuel to the
combustion chambers to ensure the most efficient air
to fuel ratio under all conditions of operation. A further
improvement to combustion is made by measuring the
oxygen content of the exhaust gases to enable the
quantity of fuel injected to be varied, according to
conditions, to correct any unsatisfactory composition
of the...

17EMISSION CONTROL
4
DESCRIPTION AND OPERATION EVAPORATIVE EMISSION CONTROL SYSTEM
The system is designed to prevent harmful fuel vapour
from escaping to the atmosphere. The system
consists of a vapour separator tank, connected to the
fuel tank and located between the body inner and
outer panels on the right hand side of the vehicle near
the rear wheel arch. An Evaporative Emissions
(EVAP) canister, containing activated charcoal, is
positioned in the engine compartment attached to the
front right...

EMISSION CONTROL
5
DESCRIPTION AND OPERATION
1. Vapour separator and pipes
2. Non-return valve to atmosphere
3. Pipe from fuel tank
4. Pipe to EVAP canister
5. EVAP canister and purge valve
6. Fuel tank