EJCP.PARTS

GM 4.8 SMALL BLOCK

The GM small-block engine family is an engine design intended as the primary V-8 engine used in General Motors' line of rear-wheel-drive cars and trucks. The GM small-block series was a "clean sheet" design with only the rod bearings and bore spacing in common in terms of shared parts and dimensions with the classic Chevrolet small block V8. The basic layout owes a good deal to the essential concept of Ed Cole's original small-block design of 1954-55, though the small-block engine also uses design cues from Buick, Oldsmobile, and Pontiac engines. Some small-block engines are all-aluminium, especially the performance oriented engines, while others use cast iron blocks. The small-block engine has been the main powerplant of the Chevrolet Corvette from 1956 to 2016, and has seen use in a wide variety of other General Motors vehicles, ranging from sport coupes to full size trucks. Due to the engine's relatively compact external dimensions compared to its displacement and power output, the engine family is also a popular choice for engine swaps, import cars, kit cars, hot rods, boats, buggies, and even light aircraft.[WIKI]

SIZES BLOCK MATERIAL HEAD MATERIAL CAM TYPE FUEL SYSTEM
4.8 CAST IRON CAST IRON OHV MPFI

ITEMS

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

LISTING TEMPLATES LR4

The Vortec 4800 LR4 (VIN code "V") is a Generation III small block V8 truck engine. Displacement is 4.8 L (293 cu in) with a 96.01 mm (3.78 inch) bore and 83 mm (3.27 inch) stroke. It is the smallest of the Generation III Vortec truck engines and was the replacement for the 5.0 L 5000 L30. The LR4 engines in 1999 produced 255 hp (190 kW) while the 2000 and above models made 270–285 hp (201–213 kW) and all have a torque rating between 285–295 lb·ft (386–400 N·m), depending on the model year and application. The 2005-2006 models made 285 hp (213 kW) and 295 lb·ft (400 N·m), LR4s are manufactured at St. Catharines, Ontario and Romulus, Michigan. It uses flat top pistons.[WIKI]

SIZES COMPATABILITY ENGINE TEMP HEAD TEMP CRANK TEMP NOTES
4.8 OHV 99 1500 SILVERADO SIERRA 4.8A NOTCHED DECK 4.8A
NON NOTCHED 4.8C
***** ***********
4.8 OHV 00 1500 SIERRA SILVERADO TAHOE YUKON 4.8B NOTCHED DECK 4.8A
NON NOTCHED 4.8C
***** ***********
4.8 OHV 01-02 SIERRA SILVERADO TAHOE YUKON 4.8C 4.8C ***** ***********
4.8 OHV 03-04 EXPRESS SAVANA 4.8D 4.8C ***** ***********
4.8 OHV 03-04 SIERRA SILVERADO TAHOE YUKON 4.8E 4.8C ***** ***********
4.8 OHV 05-07 EXPRESS SAVANA 4.8F 4.8C ***** ***********
4.8 OHV 05-06 TAHOE YUKON
05-07 SILVERADO SIERRA
4.8G 4.8C ***** ***********

LISTING TEMPLATES LY2

The Vortec 4800 LY2 (VIN code "C") is a Generation IV small block V8 truck engine. Like its LR4 predecessor, it gets its displacement from a 96.01 mm (3.780 in) bore and 83 mm (3.3 in) stroke. The smallest member of the Generation IV engine family, it is unique in that it is the only member of that family that is used in trucks that does not feature variable valve timing.It has a cast iron block. Power output is 260–295 hp (194–220 kW) and torque is 295–305 lb·ft (400–414 N·m).[WIKI]

SIZES COMPATABILITY ENGINE TEMP HEAD TEMP CRANK TEMP NOTES
4.8 OHV 07-08 SIERRA SILVERADO TAHOE YUKON SAVANA EXPRESS 4.8A 4.8A ***** ***********
4.8 OHV 09 SIERRA SILVERADO TAHOE YUKON SAVANNA EXPRESS 4.8B 4.8A ***** ***********

LISTING TEMPLATES L20

The Vortec 4800 L20 makes more power and features variable valve timing. The system adjusts both intake and exhaust timing, but does not come with Active Fuel Management. The L20 has a cast iron block and power output is 260–302 hp (194–225 kW) while torque is 295–305 lb·ft (400–414 N·m). The Vortec 4800 base engines were dropped from the Chevrolet Tahoe and GMC Yukon in favor of the 5300 with Active Fuel Management.[WIKI]

SIZES COMPATABILITY ENGINE TEMP HEAD TEMP CRANK TEMP NOTES
4.8 OHC 10-11 SIERRA SILVERADO EXPRESS SAVANNA **** 4.8A ***** ***********

VALVE INFORMATION

MAKE MODEL YEAR RANGE
BUICK LACROSSE 2008-2009
CADILLAC CTS 2006-2007
CADILLAC ESCALADE 2002-2009
CHEVROLET AVALANCHE 2007-2009
CHEVROLET AVALANCHE 1500 2006
CHEVROLET CAMARO 1998-2002
CHEVROLET COLORADO 2009
CHEVROLET CORVETTE 1997-2007
CHEVROLET EXPRESS 1500 2007
CHEVROLET EXPRESS 2500 2003-2013
CHEVROLET EXPRESS 3500 2003-2013
CHEVROLET IMPALA 2006-2009
CHEVROLET MONTE CARLO 2006-2007
CHEVROLET SILVERADO 1500 1999-2013
CHEVROLET SILVERADO 1500 CLASSIC 2007
CHEVROLET SILVERADO 2500 2001-2006
CHEVROLET SILVERADO 3500 2001-2006
CHEVROLET SILVERADO 3500 CLASSIC 2007
CHEVROLET SUBURBAN 1500 2006-2009
CHEVROLET SUBURBAN 2500 2001-2006
CHEVROLET TAHOE 2000-2011
CHEVROLET TRAILBLAZER 2006-2009
PONTIAC FIREBIRD 1998-2002
GMC CANYON 2009
GMC SAVANA 1500 2007
GMC SAVANNA 2500 2003-2013
GMC SAVANNA 3500 2003-2013
GMC SIERRA 1500 1999-2013
GMC SIERRA 1500 CLASSIC 2007
GMC SIERRA 2500 2001-2006
GMC SIERRA 3500 2001-2006
GMC SIERRA 3500 CLASSIC 2007
GMC YUKON 2000-2011
GMC ENVOY 2006-2009
HUMMER H2 2003-2007
HUMMER H3 2008-2009
HUMMER H3T 2009
PONTIAC GRAND PRIX 2005-2008
PONTIAC GTO 2004-2006
TYPE HEAD DIAMETER STEM DIAMETER O.A.L. GROOVES LOCATION
EXHAUST 39.4 7.97 124.8 1 *GM48AU
INTAKE 48 7.97 123.7 1 *GM48BU

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