Vehicle Applications

• 2008–2009 Pontiac G8 GT
• 2006 Holden Commodore VZ Series I 
• 2009–2010 Holden Commodore VZ Series II

Product Highlights

• Gen IV Aluminum Cylinder Block
• Rectangular Port Aluminum Cylinder Heads
• Active Fuel Management (AFM) / Displacement on Demand (DOD) (Pontiac G8 GT & 2009-10 Commodore with an Auto Trans)
• Advanced Electronic Throttle Control
• 58X Ignition Systems

L76 Car Engine Specs (VIN "Y")

The information listed here is for a stock engine.

Performance Specifications
Compression Ratio	10.4: 1
Horsepower Rating	355 hp.
Torque Rating	384 ft./lbs.

 

Application Information
VIN 8th Digit	Year	Make	Model
Y	2007-09	Pontiac	G8 GT
N/A	2006	Holden	Commodore VZ Series II
	2009-10		Commodore VE Series I

**The Austrailian vehicles use a different format for Vehicle Identification Numbers (VIN). The 8th digit is NOT the engine code in an Austrailian VIN code.**

 

Engine Block Specifications
Casting Number	12568952
Material	Aluminum
Displacement	6.0L / 364 c.i.d.
Bore Dia.	4.000 in.
Stroke	3.622 in.
Deck Height	9.240 in.
Bore Spacing	4.400 in.
Thrust Bearing Location	#3 Main
Main Cap Style	6-Bolt
Main Housing Bore Dia.	2.751 in.
Cam Housing Bore Dia.	Bore 1/5 = 2.346 in. Bore 2/4 = 2.326 in. Bore 3 = 2.307 in.
Cam-to-Crank Centerline	4.914 in.

 

Rotating Assembly Specifications
Piston Material	Hypereutectic Cast Aluminum Alloy
Piston Style	Flat Top
Piston Volume	0cc
Wrist Pin Dia.	0.9431 in. (Full Floating)
Connecting Rod Material	Powdered Metal
Connecting Rod Style	I-beam
Connecting Rod Length	6.098 in.
Connecting Rod Housing Bore	2.225 in.
Connecting Rod Bolts	M9 x 1 x 43
Connecting Rod P/N	12649190
Crankshaft Material	Cast Iron
Crankshaft P/N	12588613
Crankshaft Main Journal Dia.	2.559 in.
Crankshaft Rod Journal Dia.	2.100 in.
Reluctor Wheel	58X

 

Cylinder Head Specifications
Casting Numbers	5364, 823
Material	Aluminum
Combustion Chamber Volume	70cc
Intake Port Shape	Rectangle
Intake Runner Volume	257cc
Exhaust Port Shape	D-Port
Exhaust Runner Volume	87cc
Intake Valve Dia.	2.165 in.
Exhaust Valve Dia.	1.590 in.
Cylinder Head Bolt Style	Torque to Yield (TTY)
Cylinder Head Bolt Size	(10) M11 x 2 x 100, (5) M8 x 1.25 x 45

 

Camshaft Specifications
Camshaft P/N	12625439
Duration @ .050 in. (int./exh.)	196°/208°
Valve Lift (int./exh.)	0.478 in./0.466 in.
Lobe Separation	116°
Cam Gear Attachment	1-Bolt
Cam Gear Poles	4X
Active Fuel Management (AFM)	Yes on the Pontiac G8 GT and the 2009-10 Commodore with an automatic transmission
	No on the 2006 Commodore and the 2009-10 Commodore with a manual transmission
Variable Valve Timing (VVT)	No

 

Valvetrain Specifications
Lifter Style	Hydraulic Roller
Lifter Link Style	Plastic Lifter Tray
Lifter Body Diameter	0.842 in.
Pushrod Length	7.385 in.
Rocker Arm Mounting Style	Pedestal
Rocker Arm Style	Die-Cast, Roller Fulcrum
Rocker Ratio	1.7
Rocker Offset	Offset Intake
Valve Spring Style	Beehive
Valve Spring Color	Natural
Valve Angle	15 degrees
Intake Valve Material	Steel, Solid Stem
Intake Valve Dia.	2.165 in.
Exhaust Valve Material	Steel, Solid Stem
Exhaust Valve Dia.	1.590 in.

 

Other Specifications
Intake Manifold	Car-Style
Throttle Body	90mm, 4-bolt
Throttle Control	Electronic (Drive-by-Wire)
Fuel Injector P/N	12576341
Fuel Injector Flow	42 lb/hr @ 58 psi
Flex Fuel Capable	No
Fuel Injector Length (between O-rings)	1.500 in.
Fuel Injector Connector	EV6-USCAR
Computer	E38
Crankshaft Reluctor Ring	58X
Camshaft Sensor	Front timing cover, 4X
Oil Pan	Varies by Model
Oil Pump	High Volume (1.26 c.i./rev. @ 33 psi)