EJCP.PARTS

JAGUAR 4.0 AJ-V8

The Jaguar AJ-8 is a compact DOHC V8 piston engine used in many Jaguar vehicles. It was the fourth new engine type in the history of the company. In 1997 it replaced both designs previously available on Jaguar cars: the straight-6 Jaguar AJ6 engine (or rather its AJ16 variant), and the Jaguar V12 engine. It remained the only engine type available on Jaguar until 1999 with the launch of the S-Type, when the Jaguar AJ-V6 engine was added to the list. The AJ-V8 is available in displacements ranging from 3.2 L to 5.0 L, and a supercharged version is also produced. Ford Motor Company used this small V8 in other products as well, including the Lincoln LS the 2002-2005 Ford Thunderbird as well as in several Land Rovers and the Aston Martin V8 Vantage. The AJ-V8 was designed to use Nikasil-coated cylinders rather than the more-common iron cylinder liners. However, like the BMW M60, high-sulphur fuel reacted with the Nikasil liners and caused engine failures. Jaguar replaced affected engines, and has used conventional cast-iron linings ever since. The engine originally used a two-state Variable Valve Timing system to switch the intake cam timing by 30°. Newer variants use a more sophisticated system which can vary intake timing incrementally up to 48°. The Lincoln version was made in the United States. Other engine features include fracture-split forged powder metal connecting rods, a special one-piece cast camshaft, and reinforced plastic intake manifold. The AJ-V8 was on the Ward's 10 Best Engines list for 2000. The 4.0 L (3996 cc) AJ26 engine was introduced in 1996. The number "26" comes from 12+6+8 (cylinders), because when the first ideas were sketched, a family of 6-, 8- and 12-cylinder engines was contemplated, although only the 8-cylinder version was produced. It has a square 86 mm (3.4 in) bore and stroke. It was updated in 1998 as the AJ27 with continuously variable valve timing. The AJ-V8 was updated again in 2000 as the AJ28. The naturally aspirated version produces 290 hp (216 kW) in the 2000-2002 XK8.[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 DOHC 90-94 XJ6 ***** ***** ***** ***********
4.0 DOHC 95-97 XJ6 ***** ***** ***** S/C
4.0 DOHC 95-97 XJ6 ***** ***** ***** NON S/C
4.0 DOHC 97 XK8 ***** ***** ***** NOTE EGR
4.0 DOHC 98 XJ8 ***** ***** ***** XJR S/C
4.0 DOHC 98 XJ8 XK8 ***** ***** ***** NON S/C
4.0 DOHC 99 XJ8 ***** ***** ***** XJR S/C
4.0 DOHC 99-01 XJ8 XK8 ***** ***** ***** NON S/C
4.0 DOHC 00-01 XJ8 XK8 ***** ***** ***** S/C
4.0 DOHC 00-01 S TYPE ***** ***** ***** THRU VIN L86901
4.0 DOHC 01-02 S TYPE ***** ***** ***** FROM VIN L86902
4.0 DOHC 01-03 XJ8 XK8 ***** ***** ***** S/C
4.0 DOHC 01-03 XJ8 XK8 ***** ***** ***** NON S/C

VALVE INFORMATION

MAKE MODEL YEAR RANGE
****** ******* *******
TYPE HEAD DIAMETER STEM DIAMETER O.A.L. GROOVES LOCATION
EXHAUST ***** ***** ***** ***** ******
INTAKE ***** ***** ***** ***** *****

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