Lift each wheel in turn with the jack and give it a spin by hand. This confirms the brakes are free of grit and gives an idea of the wheel bearing condition. Lever the front wheels sideways to feel bearing play, and in a vertical arc to the feel swivel bearing play.
Tyre should be checked when rejoining the road, especially if there was exposed rock on the tracks. Look for cuts and bulges on the tread and both the inner and outer sidewalls. Check the pressure; too you may have collected a slow puncture. Like to clean mud from the engine compartment strait away it’s difficult to shift if it backs on the engine and, being abrasive, it’s the last thing you went in there. When the engine compartment is dry, spray the whole thing with WD40 or similar. This will be helps disperse moisture from the
electrics and leaves a light film over everything.
From turbo to engine have internal pressure, but water can still get in if the engine conks out or stalls while wading. Put a bead of silicone sealant around these connections.
In dusty condition, the air filter may need earlier replacement likewise the engine oil and filter. The cooling system need to be in good condition to handle those unexpected long, slow, steep climbs. Keep an eye on the coolant pump gasket, though.
Check the lamp lenses for moisture and remove them to allow the lamp to dry, and squirt WD40 into the bulb holders. Seal the fitting if they’re taking a lot of water in. This should help your Land Rover Defender to have a long and reliable life.
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