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Essentially what happens on the Defender 90 with the PCV, which is positive crankcase ventilation, restricted vacuum, due to the oil separator is going to create vacuum in the engine.
Also, down in the crankcase area and up in the valve covers. At the top, you need a breather, so that there's a flow of fresh air running through the crankcase to alleviate any corrosive gases that build up and crankcase pressure.
Watch Doug, our Land Rover Master Technician, go over the steps involved in performing the PCV Tune-Up Service on a 1997 Defender 90. The service also applies to Land Rover Discovery I and Range Rover P38 (GEMS Engine vehicles - see fitment years.)
Using our money-saving PCV kit # 9205G, with everything you need to do this service, it is recommended that the PCV system be replaced every 30,000 miles.
Questions about this video? Call us at 1-800-533-2210 or contact us via the question tab.
Atlantic British Ltd. Repair & Maintenance Academy How-To Video: The Valve Cover Gaskets in the 4.0 / 4.6 / 3.9 / 4.2 Bosch engine in older Rover models like the 4.0 / 4.6 Range Rover, Discovery Series II, Range Rover Classic are notorious for leaking. Here is how to service: Watch Doug, our Land Rover Master Technician, perform the Valve Cover Gasket Replacement on 2002 Discovery Series II (not equipped secondary air). Using Valve Cover Gaskets Part # LVC100260, you will need two gaskets in this service. This video also covers removing the throttle body and replacing throttle body gasket (ERR6623) without disconnecting the coolant lines, removing and replacing the upper intake manifold gasket (ERR6621), and removing and replacing the oil separator (LLJ000010) as you have the passenger-side valve cover gasket off. Doug will also discuss vehicles equipped with secondary air. Questions about this video? Call us at 1-800-533-2210 or contact us via the question tab.
To ensure parts fit your vehicle, please select your rover below.