The FL2 doesn't have a crankcase filter, only a separator that returns the oil to the sump and any gases back through the induction system.
Although this job is specified in the service routine, the Land Rover workshop manual makes no reference to the procedure for changing it. The filter is housed inside the depression limiter valve casing on top of the engine. To reach it you’ll need to remove the air filter element cover and engine top cover, then unbolt the injector harness support rail and tilt it forward out of the way. The depression limiter valve assembly is between the injector harness and the air filter casing. It’s black plastic with two circular shapes, like a figure eight on its side.
Depression limiter valve assembly (arrowed) is unscrewed
Remove the screws from the valve casing and lift off the assembly. You’ll see the filter under the left side as you lift it up (viewed from the front of the bonnet). The filter should be renewed every 24,000 miles or two years, whichever is soonest. If the filter isn’t changed and becomes blocked, it can cause excess crankcase pressure leading to damaged oil seals and oil leaks. It can also affect engine power, cause an inability to rev, produce exhaust smoke and increase oil consumption. If you find that the filter is blocked, it’s best to renew the complete depression limiter valve assembly. Incidentally, this also applies to the Range Rover fitted with the Td6 diesel engine.
After the valve assembly is lifted, the filter (arrowed) will be visible
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you decide