General

Engine





The AJ26 power unit is available as 4.0 L, and comprises:
- An eight cylinder 90 degree 'Vee' configuration liquid cooled aluminum cylinder block incorporating 'Nikasil' plated cylinder bores.
- Pistons of open-ended skirt design, with two compression and one oil control ring.
- Two aluminum cylinder heads, each incorporating two camshafts.
- Four valves per cylinder.
- Aluminium valve lifters and top mounted shims.
- Variable Valve Timing (VVT) of the intake camshafts (4.0 L normally aspirated only).
- Camshaft covers manufactured from Vinylester.
- Aluminium timing cover which accommodates the crankshaft front oil seal.
- Single row primary and secondary chains drive the camshafts of each cylinder bank.
- An aluminum bed plate, incorporating iron main bearing supports, which accommodate the oil pump pick-up, diverter valve (if fitted) and oil filter.
- Main bearings which are grooved in the upper positions and plain in the lower positions. They are manufactured from aluminum/tin material.
- A crankshaft with undercuts and rolled fillets for extra strength.
- Fracture-split connecting rods in sintered-forged steel.
- Brackets bolted to the front of the cylinder block are used to mount all accessories.
- A single, seven ribbed vee belt drives the accessories.
- An automatic belt tensioner for the front accessory drive, incorporating a wear indicator.
- An advanced engine management system incorporating electronic throttle control.
- The unit meets the requirements of the CARB OBDII USA legislation.

Ancillary Systems
The ancillary systems, driven by the engine, each have a detailed Description and Operation along with Diagnostic Procedures, and Removal and Installation instructions; refer to the Proper Component System For each of the Following:
- Power Steering Pump
- Air Conditioning Compressor
- Engine Cooling Pump
- Generator
- The drive belt, idler pulley and automatic tensioner.
The engine starting system.