JAGUAR X308 1998 2.G Workshop Manual

Automatic Transmission/Transaxle External Contro ls - 4.0L SC V8 - AJ26 -
Selector Lever Knob
Removal and Installation
Removal
Installation

1.
Disconnect the vehicle battery ground lead.

2. Remove the select or lever knob.
1. Slacken the ferrule, rotate clockwise.
2. Rotate the knob coun ter-clockwise to remove.

1. Refer to the illustration.
1. Fit the knob.
2. Refer to the illustration.

Exhaust System -
Torques


ComponentNm
Nut - Downpipe catalytic converter to exhaust manifold14 - 18
Bolt - Downpipe catalytic converter to lower mounting bracket39 - 51
Bolt - Front muffler mounting to gearbox (SC)22 - 28
Bolt - Front muffler mounting to front muffler cross brace (SC)22 - 28
Bolt - Over-axle mounting to rear suspension A-frame22 - 28
Torca clamps52 - 68
Oxygen sensor to downpipe40 - 50

Exhaust System - Exhaust System
Description and Operation
Exhaust Components - Normally Aspirated Vehicles

Exhaust Components - Supercharged Vehicles

All vehicles are fitted with a stainless steel exhaust system which features:
Low back-pressure gas flow. Catalytic converters for mark ets having unleaded fuel. Front muffler common to the left-hand and right-hand engine cylinder banks.
Downpipe Catalytic Converter Assembly

The left-hand and right-hand do wnpipe assemblies feature:
Catalytic converter with palladium / rhodium coated elem ents. The elements are uncoated for markets with only
leaded fuel.
Retained to the exhaust manifold flange by four thread ed studs. Joint-to-joint sealing is with a gasket. Engine-mounted bracket providing downpipe mounting by two nuts to the torque converter housing and two bolts to
the downpipe.
Front Muffler Assembly
ItemPart NumberDescription
1—Downpipe catalytic converter
2—Upstream heated oxygen sensor
3—Downstream oxygen sensor (North American markets only)
4—Engine mounting bracket (LHS and RHS)

The front muffler assembly features:
Twin-pipe absorption type muffler. Pipe-to-pipe pres sure damping. Inlet and outlet pipes welded to the muffler. Front joints are flanged on supercharged engines and a flexible pipe (not removable separately ) is fitted behind each
flange - refer to the inset above.
Intermediate Muffler Assembly

The left- and right-hand intermedia te muffler assemblies comprise:
Absorption type muffler. Inlet and outlet pipes welded to the muffler.

Rear Muffler Assembly

The left-hand and right-hand rear muffler assemblies comprise:
Absorption type muffler. Inlet pipe and tailpipe welded to the muffler. Tailpipe bright finisher integral with the tailpipe.
Tailpipe Clearance to Moulded Bumper

Joints and Clamps

Pipe-to-pipe joints which are slip joints, feature:
Clamping by Torca strap clamp. Indicator rings providing Maximum, Mini mum and Nominal engagement marks.
Oxygen Sensor (O2)
Location

Parts List
Operation
ItemPart NumberDescription
1—Heated oxygen sensor (upstream)
2—Oxygen sensor (downstream)
3—Catalytic converter

The upstream heated oxygen sensor is located at the catalytic converter inlet and detects the concentration of oxygen in the
raw exhaust gases; an internal heater reduces the warm up time of the sensor output.
An oxygen sensor (without heater) is located at the converter outlet.
The ECM receives input signals from the se nsors and varies the fuel injector duration (mixture) to provide optimum gas
emissions.
Circuit Diagram, O2 Sensors / ECM