EJCP.PARTS

GM 4.0 L47 NORTHSTAR

The L47 Aurora engine was a special V8 designed for the Oldsmobile Aurora, based on the Northstar engine. It is a DOHC 3,995 cc (3.995 L; 243.8 cu in) V8 which produced 250 horsepower (186 kW) and 260 lb·ft (353 N·m) of torque. The bore was 87 mm (3.4 in) and the stroke was 84 mm (3.3 in). The L47 had a 10.3:1 compression ratio and used premium fuel. An early version or prototype of this engine was used in the 2nd generation Oldsmobile Aerotech. Although most of the Northstar's features, including the coolant loss system, remained intact, the decreased bore increased weight unacceptably. To reduce it, Oldsmobile used a one-piece glass-filled thermoplastic intake manifold and simplified AC Rochester sequential fuel injection. A new die-cast structural aluminum oil pan incorporated baffling to reduce oil starvation in hard driving. A starter interlock prevented the starter from engaging if the quiet L47 was already running. A highly modified 650 hp (485 kW) version of this engine was used by General Motors racing division initially for Indy Racing League competition starting in 1997, then was later used in the Cadillac Northstar LMP program in 2000. Both engines retained the 4.0 L displacement, but the Northstar LMP version was twin-turbocharged.[2] The Aurora was also used in the Shelby Series 1 car. The Aurora engine was introduced in 1994 for the 1995 model year, and General Motors has not used this engine since the demise of the marque in 2004.[WIKI]

SIZES BLOCK MATERIAL HEAD MATERIAL CAM TYPE FUEL SYSTEM
4.0 ALUMINUM ALUMINUM DOHC MPFI

ITEMS

BRACKETS EXHAUST MANIFOLD INTAKE MANIFOLD OIL PAN PISTON
SENSORS TIMING COVER TIMING SET VALVE COVER VALVE INFORMATION

LISTING TEMPLATES

SIZES COMPATABILITY ENGINE TEMP HEAD TEMP CRANK TEMP NOTES
4.0 95 AURORA 4.0B 4.0A *****
4.0 96-99 AURORA 4.0A 4.0A ***** 98-JHB
96-JJA
97-KHA
4.0 01-02 AURORA 4.0C 4.0C ***** 01- KHB
02- JHA
4.0 03 AURORA 4.0D 4.0D ***** 03- KHB

VALVE INFORMATION EXHAUST

MAKE MODEL YEAR RANGE
CADILLAC DEVILLE 2000-2003
CADILLAC ELDORADO 2000-2002
CADILLAC SEVILLE 2000-2003
OLDSMOBILE AURORA 2001-2002
OLDSMOBILE INTRIGUE 1999-2002
TYPE HEAD DIAMETER STEM DIAMETER O.A.L. GROOVES LOCATION
EXHAUST 28 5.9 93.4 1 *GM46AU

VALVE INFORMATION INTAKE 1995-1999

MAKE MODEL YEAR RANGE
OLDSMOBILE AURORA 1995-1999
TYPE HEAD DIAMETER STEM DIAMETER O.A.L. GROOVES LOCATION
INTAKE 31.2 5.9 106.4 1 *GM40BU

VALVE INFORMATION INTAKE 2000-2009

MAKE MODEL YEAR RANGE
BUICK LUCERNE 2006-2009
CADILLAC DEVILLE 2000-2005
CADILLAC DTS 2006-2009
CADILLAC ELDORADO 2000-2002
CADILLAC SEVILLE 2000-2004
CADILLAC SRX 2004-2009
CADILLAC STS 2005-2009
CADILLAC XLR 2004-2009
OLDSMOBILE AURORA 2001-2002
OLDSMOBILE INTRIGUE 1999-2002
PONTIAC BONNEVILLE 2004-2005
TYPE HEAD DIAMETER STEM DIAMETER O.A.L. GROOVES LOCATION
INTAKE 36.2 5.9 112 1 *GM46BU

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