2010 JAGUAR XFR Workshop Manual

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Page 1545 of 3039

JAGUAR XFR 2010 1.G Workshop Manual Published: 28-Apr-2014
Exhaust System - V8 5.0L Petrol/V8 S/C 5.0L Petrol - Exhaust System - Component Location
Description and Operation

Page 1546 of 3039

JAGUAR XFR 2010 1.G Workshop Manual Published: 11-May-2011
Exhaust System - V8 5.0L Petrol/V8 S/C 5.0L Petrol - Exhaust System - Overview
Description and Operation

OVERVIEW

5.0L V8 NATURALLY ASPIRATED AND SUPERCHARGER - FROM 201

Page 1547 of 3039

JAGUAR XFR 2010 1.G Workshop Manual Published: 28-Apr-2014
Exhaust System - V8 5.0L Petrol/V8 S/C 5.0L Petrol - Exhaust System - System Operation and Component Description
Description and Operation

CATALYTIC CONVERTERS System O

Published: 28-Apr-2014
Exhaust System - V8 5.0L Petrol/V8 S/C 5.0L Petrol - Exhaust System - System Operation and Component Description
Description and Operation

CATALYTIC CONVERTERS System Operation

In the catalytic converters, the exhaust gases are passed through honeycombed ceramic elements coated with a special
surface treatment called 'washcoat'. The washcoat increases the surface area of the ceramic elements by a factor of
approximately 7000. On top of the washcoat is a coating containing palladium and rhodium, which are the active constituents
for converting harmful emissions into inert by-products. The palladium and rhodium add oxygen to the carbon monoxide and
the hydrocarbons in the exhaust gases, to convert them into carbon dioxide and water respectively.

SEMI-ACTIVE MUFFLER VALVE (5.0L SUPERCHARGER VEHICLES ONLY)

The semi-active muffler valve is operated by the pressure in the exhaust system. At low engine speeds the valve head is
closed or partially closed to provide a more refined noise quality. At higher engine speeds the increased pressure within the
exhaust system opens the valve head to provide a more sporting noise. This is achieved by the valve, which once open, allows
the exhaust gasses to by-pass the baffle tubes and plates in the rear silencer.

Component Description
FRONT SECTION - 4.2L NATURALLY ASPIRATED (NAS ONLY) - From 2010MY

The front section comprises two separate pipes, each incorporating a catalytic converter. Each catalytic converter has a welded
inlet pipe with a flange. The inlet pipe is flared into a cone which mates with the exhaust manifold. The flange has two holes
which locate on studs in the exhaust manifold and is secured with flanged nuts. Each catalytic converter is fitted with a pre
and post catalyst HO2S (heated oxygen sensor).

Each catalytic converter has a curved outlet pipe which mates with the respective inlet pipe for the applicable resonator on the
center section. The joint on each pipe is secured with a clamp.

FRONT SECTION - 5.0L NATURALLY ASPIRATED AND SUPERCHARGER - From 2010MY

The front section is common to both the naturally aspirated and supercharger vehicles. The front section comprises two
separate pipes each incorporating a catalytic converter. Each catalytic converter has a welded pipe with a flange, which is
flared into a cone which mates with the exhaust manifold. Each flange has two holes which locate on studs in the exhaust
manifold and are secured with nuts. Each catalytic converter is fitted with a mid catalyst HO2S. The mid catalyst HO2S is located in the catalytic converter.

NOTE: The pre catalyst HO2S is located in the exhaust manifold.
On vehicles from 2013MY, a post catalyst HO2S is located in the curved pipe from each catalytic converter.
A curved pipe from each catalytic converter locates into the resonator inlet pipes of the center section. The LH (left-hand) pipe
is fitted with a mass damper which absorbs resonance from the system.

REAR SECTION - 4.2L NATURALLY ASPIRATED (NAS ONLY) - From 2010MY

The 2 inlet pipes each connect into a separate resonator silencer. Each resonator silencer is cylindrical in shape and houses 2
perforated tubes separated by 2 baffle plates. Exhaust gasses exit each resonator silencer via an outlet pipe. The 2 outlet
pipes are joined together behind the resonators with a cross over pipe. Each pipe also has a welded hanger bracket which
allow the rear section to be supported on mounting rubbers. A further bracket is welded to each pipe which braces the 2 pipes
together.

The 2 rear silencers each have a welded inlet pipe which mate with the outlet pipes from the resonator silencers and are each
secured with a clamp. The inlet pipes each have a welded hanger bracket which support each rear silencer at the rear of the
vehicle on mounting rubbers. The fabricated rear silencers have 2 perforated tubes which are supported on 2 perforated baffle
plates. The exhaust gasses are expelled from the rear silencer via a single outlet pipe. The outlet pipe from each silencer has
a welded hanger bar which support the rear silencer on mounting rubbers. The outlet pipe is fitted with a welded outlet which
is covered with a polished stainless steel finisher which is part welded to the silencer.

REAR SECTION - 5.0L NATURALLY ASPIRATED - From 2010MY

The 2 pipes from the front section each connect into 2 short pipes on the center resonator box and are secured with clamps.
Two pipes from the resonator box split the system into 2 sections which each connect into another resonator. Each resonator
silencer houses perforated tubes separated by baffle plates. Exhaust gasses exit each resonator silencer via an outlet pipe.
The 2 outlet pipes are joined together behind the resonators with a cross over pipe. Each pipe also has a welded hanger
bracket which allow the rear section to be supported on mounting rubbers. A further bracket is welded to each pipe which
braces the 2 pipes together.
The 2 rear silencers each have a welded inlet pipe which mate with the outlet pipes from the cylindrical resonator silencers and
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Page 1548 of 3039

JAGUAR XFR 2010 1.G Workshop Manual are each secured with a clamp. The inlet pipes each have a welded hanger bracket which support each rear silencer at the rear
of the vehicle on mounting rubbers. The fabricated rear silencers have 2

are each secured with a clamp. The inlet pipes each have a welded hanger bracket which support each rear silencer at the rear
of the vehicle on mounting rubbers. The fabricated rear silencers have 2 perforated tubes which are supported on 2 perforated
baffle plates. The exhaust gasses are expelled from the rear silencer via a single outlet pipe. The outlet pipe from each
silencer has a welded hanger bar which support the rear silencer on mounting rubbers. The outlet pipe is fitted with a welded
outlet which is covered with a polished stainless steel finisher which is part welded to the silencer.

REAR SECTION - 5.0L SUPERCHARGER - From 2010MY

The 2 pipes from the front section each connect into 2 short pipes on the center resonator box and are secured with clamps.
Two pipes from the center resonator box each connect into a second resonator silencer. The resonator silencer comprises
perforated tubes separated by 2 baffle plates. Exhaust gasses exit the resonator silencer via 2 outlet pipes. Each pipe has a
welded hanger bracket which allows the rear section to be supported on mounting rubbers. A further bracket is welded to each
pipe which braces the 2 pipes together.

The 2 rear silencers each have a welded inlet pipe which mate with the outlet pipes from the cylindrical resonator silencers and
are each secured with a clamp. The inlet pipes each have a welded hanger bracket which support each rear silencer at the rear
of the vehicle on mounting rubbers. The fabricated rear silencers have a perforated inlet tube which is supported on 2 baffle
plates. Each rear silencer has a welded hanger bar which supports the rear silencer on mounting rubbers. The outlet pipe is
fitted with a welded twin outlet which is covered with 2 polished stainless steel finishers which are part welded to the silencer.

Semi-Active Muffler Valve

NOTE: LH silencer shown, RH (right-hand) silencer similar

Item Description 1 Outer case 2 Overpipe 3 Valve cage 4 Semi-active muffler valve assembly A semi-active muffler valve is located in the rear of each rear silencer. The valve comprises a valve head, a valve shaft, a shaft
guide, a housing shell, a membrane and a spring. The valve head is connected to the membrane by the valve shaft which is
located within the shaft guide. The valve shaft is attached to the membrane with a pin. The membrane is located inside the
housing shell and is held in position by the spring.

The valve head is located in and seals against the over pipe. When the exhaust gas pressure increases and overcomes the
spring pressure, the valve head is lifted and the gasses by-pass the valve and are expelled though slots in the valve cage into
the rear chamber and into the outlet pipe.

When the semi-active muffler valve is closed the exhaust gasses are expelled from the inlet tube through the perforations. The
exhaust gasses then pass through perforations in the outlet pipe and are expelled from the silencer via the single outlet pipe
and 2 polished stainless steel finishers.

When the semi-active muffler valve is open, the exhaust gasses are released into the rear chamber. The exhaust gasses then
pass directly into the open end of the outlet pipe and are expelled from the silencer via the outlet pipe and the 2 polished
stainless steel finishers. With the valve open, the gasses reduce through the baffle plates and tube perforations giving the
exhaust note a more 'sporty' sound.

Page 1549 of 3039

JAGUAR XFR 2010 1.G Workshop Manual Published: 11-May-2011
Exhaust System - V8 5.0L Petrol/V8 S/C 5.0L Petrol - Exhaust System
Diagnosis and Testing

Principle of Operation

For a detailed description of the exhaust system, refer

Published: 11-May-2011
Exhaust System - V8 5.0L Petrol/V8 S/C 5.0L Petrol - Exhaust System
Diagnosis and Testing

Principle of Operation

For a detailed description of the exhaust system, refer to the relevant Description and Operation section of the workshop
manual. REFER to: (309-00C Exhaust System - V8 5.0L Petrol/V8 S/C 5.0L Petrol)

Exhaust System (Description and Operation), Exhaust System (Description and Operation), Exhaust System (Description and Operation).
Inspection and Verification

CAUTION: Diagnosis by substitution from a donor vehicle is NOT acceptable. Substitution of control modules does not
guarantee confirmation of a fault and may also cause additional faults in the vehicle being checked and/or the donor vehicle.

NOTE: Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.

1. Verify the customer concern.
2. Visually inspect for obvious signs of damage and system integrity.

3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to
the next step.

4. If the cause is not visually evident, verify the symptom and refer to the Symptom Chart, alternatively check for
Diagnostic Trouble Codes (DTCs) and refer to the DTC Index.

Symptom Chart

Symptom Possible Causes Action Excessively
noisy/leaking
exhaust
Exhaust
system/components Inspect exhaust system. Rectify leaks and install new components as
required. Refer to Removal and Installation instructions in this section Loss of power
Restricted exhaust system
Exhaust sound
enhancement valve stuck
closed
Fuel system
Ignition system
Electronic engine control Inspect exhaust system. Install new exhaust components as required.
Refer to Removal and Installation instructions in this section. Check for
fuel, ignition and electronic engine control system DTCs and refer to the
relevant DTC Index
DTC Index

For a list of Diagnostic Trouble Codes (DTCs) that could be logged in the Engine Control Module (ECM), please refer to Section
303-14. REFER to:

Electronic Engine Controls (303-14C Electronic Engine Controls - V8 5.0L Petrol, Diagnosis and Testing), Electronic Engine Controls (303-14D Electronic Engine Controls - V8 S/C 5.0L Petrol, Diagnosis and Testing). Mechanical

Leaks
Metal fatigue
Pipes
Catalytic converter
Muffler(s)
Joints
Mountings
Clearance around components Visual Inspection

Page 1550 of 3039

JAGUAR XFR 2010 1.G Workshop Manual Published: 11-May-2011
Exhaust System - V8 5.0L Petrol/V8 S/C 5.0L Petrol - Catalytic Converter LH
Removal and Installation

Removal

NOTE: Removal steps in this procedure may contain installa

Page 1551 of 3039

JAGUAR XFR 2010 1.G Workshop Manual
6. CAUTION: Make sure that the exhaust system is
supported with suitable retaining straps.
Tighten the top retaining nut first.
Torque:
Top nut 40 Nm Bottom nut 40 Nm

Page 1552 of 3039

JAGUAR XFR 2010 1.G Workshop Manual
2. NOTE: For NAS vehicles only.

If required, carry out a long drive cycle.

Refer to: Powertrain Control Module (PCM) Long Drive Cycle Self-Test (303-14D Electronic Engine Controls - V8 S/C 5.0

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