LR3/Disco 3
The camshaft position sensors are installed in each cylinder head at the rear of the intake camshaft. It is a variable
reluctance sensor that provides an input to the ECM regarding the position of the camshaft. For additional information,
refer to
Electronic Engine Controls
(303-14B Electronic Engine Controls - 4.4L)
Inlet and Exhaust Valves
Each cylinder head incorporates dual overhead camshafts operating four valves per cylinder via solid shimless aluminium
alloy valve lifters.
The lightweight valve gear provides good economy and noise levels. Valve head diameters are 31mm (1.220 in) for the
exhaust and 35mm (1.378 in) for the intake. All valves have 5mm (0.197 in) diameter stems supported in sintered metal
seats and guide inserts. Collets, valve collars and spring seats locate single valve springs on both intake and exhaust
valves. Valve stem seals are integrated into the spring seats.
Fuel Injectors
CAUTION : Due to slight variations in length, the valves are not interchangeable between marques (Land
Rover, Jaguar and Aston Martin).
