Engines Page E-1
Page E-1
Section E
Engines
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 b ag and left and right hand
side air bags. Refer to CAUTIONS, Section 12M, of the Holden Adventra AWD series 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 Engines - General Information..............................................................................................................3
Engine Dress Covers............................................................................................................................................. 3
Engine Air Induction System................................................................................................................................ 3
3 Avalanche AWD 270 LS1.......................................................................................................................5
3.1 General Description............................................................................................................................................... 5
3.2 Service Operations ............................................................................................................................................... 6
Techline
Techline
Engines Page E-2
Page E-2
1 Purpose
The purpose of this supplement is to provide information on the engine package fitted to the HSV Avalanche AWD
models. This information is designed to supplement that given in the Holden Adventra AWD series 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 Holden Adventra AWD
series Service Information Supplement.
References are made throughout this section to
Holden Service Information, to assist in providing
information for specific service operations.
When hoisting (or jacking) HSV models,
ensure that the liftin g head of the hoist lifts on
the chassis before the arm of the hoist
contacts the side-skirt
Engines Page E-3
Page E-3
2 Engines - General Information
Avalanche AWD sees the carry over of the Chevrolet Generation III engine introduced into the HSV range during VT2.
This engine has received upgrades to the base engine as manufactured by GM, resulting in improvements over the VT2
engine.
The 270 LS1 engine is not modified internally by HSV, and uses an HSV specific calibration to optimise the benefits of
the specific HSV exhaust and inlet systems. As part of the development process, these changes have been proven
through extensive testing throughout Australia, as is the case with all engines fitted to HSV models.
The HSV engine is discussed in the following paragraphs.
Engine Dress Covers
The HSV LS1 V8 engine is fitted with a specific decorative engine cover. This is a large one piece plastic cover that
encases the fuel rail and coil packs, as well as the inlet manifold and throttle body. The cover includes a moulded-in HSV
Lion and Helmet logo, and is painted black, with silver highlights.
LS1
06M-990601 COVER ASM: LS-1 ENGINE (SILVER HIGHLIGHT)
Engine Air Induction System
The intake system is common with the 285 LS1 introduced with VYII, and this incorporates much of the standard Holden
system, with the difference being concentrated on ensuring the engine receives as much cold air as possible. This was
found to give the greatest performance advantage, and also helped reduce the performance lost due to stop start warm
weather driving.
The intake system on the HSV LS1 uses the standard Holden air filter element, Mass Air Flow (MAF) Sensor and Inlet Air
Temperature (IAT) sensor. Service requirements for the filter are described in the Holden service Information, and no
adjustment is possible on the MAF sensor.
To remove the HSV inlet duct, it is necessary to release the coolant system surge tank from its locating studs, then pull
the airbox base away from its locating studs, pulling the rear away first, and then away from the inlet duct. To remove the
duct, it is best to take the outboard edge of the duct and rotate it inboard and up to clear bodywork, then pull out.
For replacement part numbers see Drawings 06I-030001.
Engines Page E-4
Page E-4
DATE
ISSUE DATEDISSUE DATED
AUTH'Y
CK.
SYM
AUTH'Y
RELEASERELEASE
REVISION RECORDREVISION RECORD
DATE
SYM
SIGNATURES ONSIGNATURES ON
ORIGINAL APPROVALORIGINAL APPROVAL
DR.
14.07.00
ADVANCED AUTOMOTIVE DESIGN AND ENGINEERINGADVANCED AUTOMOTIVE DESIGN AND ENGINEERING
06I-030001
INSTRUCTION DRAWING.INSTRUCTION DRAWING.
A4
SIZE
AIR CLEANER
INSTALLATION
AIR CLEANER
INSTALLATION
06M3030603
06M3030602
06M3030604
2.2 - 3.2 Nm2.2 - 3.2 Nm
74A030001
122550385
(3 PLACES)
122550385
(3 PLACES)
REVISION RECORDREVISION RECORD
PRELIMINARY ISSUEPRELIMINARY ISSUE
CK.
NAME
PART NO.PART NO.
CK.
REFERENCE
DWG.
DR.
DATE:
APPR
APPR
DR.
07.11.03
AP
DP
JO
A
A
VIEW
1
1
1
1
1
Engines Page E-5
Page E-5
3 Avalanche AWD 270 LS1
3.1 General Description.
All HSV Avalanche AWD V8 models use the Chevrolet developed LS1 engine. This engine is common with the Holden
Gen III V8 engine, and has a capacity of 5667m3, produced by a bore of 99.00 mm and a stroke of 92.00 mm. The
compression ratio for this engine is 10.1:1.
The base engine design is that of a 90° V8, two valve per cylinder engine. The engine features an aluminium block and
heads, with cast iron sleeves cast into the block during manufacture, while the heads have powdered metal valve guides
and seats pressed in place.
For more information regarding the LS1 engine, see the relevant section in Holden's Adventra AWD Service information.
The HSV LS1 engine has an optimised Cold air Induction System, including a Low Restriction large diameter ‘Zip Tube’,
a Low Restriction Exhaust System and an Optimised Engine Management System. These improvements allow the
engine to develop 270kW at 5,700 rpm and 475Nm at 4,000 rpm.
