Fuel And Exhaust Systems Page G-1
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Section G
Fuel And Exhaust Systems
ATTENTION
HSV vehicles are equipped with a Supplemental Restraint System (SRS). An SRS consists of seat belt pre-
tensioners (fitted to all front seats), a driver’s-side air bag, a passenger’s-side air bag,and left and right side
airbags. Refer to CAUTIONS, Section 12M, of the Holden WL Service Information before performing any service
operation on or around SRS components, the steering mechanism or wiring. Failure to follow the CAUTIONS
could result in personal injury or unnecessary SRS system repairs.
1 Purpose...................................................................................................................................................2
2 Exhaust System General Information ..................................................................................................3
2.1 Grange 297 Exhaust System................................................................................................................................. 3
General Description............................................................................................................................................... 3
Service Operations ................................................................................................................................................ 3
3 Fuel System General Information.........................................................................................................4
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1 Purpose
The purpose of this supplement is to provide information on the fuel and exhaust systems fitted to the HSV WL model.
This information is designed to supplement that given in the Holden WL Service Information, and details are given where
differences occur between the HSV models, and standard Holden models. A series of instruction drawings detail the design
changes and indicate specific part numbers, fitting instructions and relevant notes for vehicle servicing.
NOTE
If specific technical data on a HSV model is not
contained in this supplement, obtain data for that
model from the relevant HSV or Holden WL Service
Information Supplements.
When hoisting (or jacking) HSV models, ensure
that the lifting head of the hoist lifts on the
chassis before the arm of the hoist contacts the
side-skirt
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2 Exhaust System General
Information
The development of unique HSV Exhaust Systems has been necessitated by, and conducted in parallel with, the
development of engines and transmissions. A range of exhaust systems has been developed to satisfy the demands for
specific applications. Each development has been designed to operate with a specific engine and has been proven by
extensive testing.
For WL the exhaust has been developed with different levels of refinement in mind. The 297 kW ‘sports’ system has been
developed to produce a sports oriented note, that still meets legal requirements. The design of the sports rear muffler is a
straight through, low backpressure design that has been retuned to provide differentiation in the exhaust notes. It has been
found with the new LS2 engine that exhaust headers are no longer required and therefore the exhaust system is standard
Holden from the manifolds back to the intermediate muffler
For WL there is also a specific low backpressure muffler design, which incorporates a machined alloy tailpipe to provide
further differentiation.
Although HSV and Holden exhaust systems are different, the general principles are the same. Service notes specified in
relevant Holden Service Information Supplements provide useful information. Particularly, the relationship between exhaust
components and the clearances between exhaust components and the vehicle body are important. Information on the
relationship of HSV components, torque settings and clearances between exhaust components and the body of the vehicle is
presented in this section.
2.1 Grange 297 Exhaust System
General Description
Much of the exhaust system fitted to the HSV WL models is carried over from VZ, using the standard Holden exhaust
manifolds, engine pipes and catalytic convertors. Also, there has been a change in muffler design, to give the dual outlet
sports muffler a more sporty note along with a new intermediate muffler design to incorporate core vehicle changes to the
propeller shaft. The intermediate muffler now incorporates a single balance pipe shorter, straight through mufflers and revised
pipework past the differential.
For Grange models, the exhaust system is common with the SWB model up to the intermediate muffler, which is 150mm
longer for LWB models, still using the same muffler elements. Grange models also require a new rear muffler, with a revised
tailpipe, due to the extra length in the rear section of the vehicle.
Service Operations
When servicing the exhaust systems fitted to HSV WL vehicles, refer to Drawing 08I-030018.
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3 Fuel System General Information
All components of the fuel systems in HSV WL models are carry over from HSV VZ models. It follows that reference to the
appropriate HSV VZ Service Information Supplement is necessary when performing any servicing operation on these
components.
Refer Section 8A1 Fuel Tank of Holden WL Service Information.
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DATE
ISSUE DATED
AUTH'Y
CK.
SYM
AUTH'Y
REVISION RECORD
DATE
SYM
SIGNATURES ON
ORIGINAL APPROVAL
DR.
ADVANCED AUTOMOTIVE DESIGN AND ENGINEERING
08I-030018
INSTRUCTION DRAWING.
A4
SIZE
EXHAUST SYSTEM
WL GRANGE
REVISION RECORD
PRELIMINARY ISSUE
CK.
NAME
PART NO.
CK.
REFERENCE
DWG.
DR.
DATE:
APPR
APPR
DR.
17/11/04
AP
DP
JD
EXHAUST MANIFOLDS
AND CAT
. CONVERTORS
AS PER HOLDEN VZ MODELS
INTERMEDIATE MUFFLER
HSV-08C-041301
REAR MUFFLER
HSV-08C-041304