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HYDRAULIC TAPPETS. . . . . . . . . . . . . . . . . . . . . 54 SPECIFICATIONS SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . 56 TORQUE SPECIFICATIONS . . . . . . . . . . . . . . . . . 59 SPECIAL TOOLS 4.0L ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 DESCRIPTION AND OPERATION ENGINE DESCRIPTION The 4.0 Liter (242 CID) six-cylinder engine is an In-line, lightweight, overhead valve engine. This The engine cylinder head has dual quench-type combustion chambers that create turbulence and fast The cylinders are numbered 1 through 6 from front to rear. The firing order is 1-5-3-6-2-4 (Fig. 1). The crankshaft rotation is clockwise, when viewed from the front of the engine. The crankshaft rotates The engine Build Date Code is located on a machined surface on the right side of the cylinder The digits of the code identify: • 2nd & 3rd Digits—The month (01 - 12). • 4th & 5th Digits—The engine type/fuel system/ compression ratio (MX = A 4.0 Liter (242 CID) 8.7:1 • 6th & 7th Digits—The day of engine build (01 - 31). (1) FOR EXAMPLE: Code * 801MX12 * identi- fies a 4.0 Liter (242 CID) engine with a multi-point Fig. 1 Engine Firing Order Fig. 2 Build Date Code Location 1 – YEAR 9 - 2 4.0L ENGINE WJ |