Engine parts and Ancillaries for you 2.5L Turbo Diesel (Engine Code 19J) Defender
The Diesel Turbo, although essentially the same as the 2.5-litre diesel, had numerous additions and modifications to allow it to cope with the stresses of turbocharging. New pistons with Teflon-coated crowns and Nimonic steel exhaust valves were used to withstand higher combustion temperatures. The crankshaft was cross-drilled for improved strength and cooling. The block was modified to allow an oil feed/drain system to the turbocharger, and the cooling system was improved with an 8-bladed viscous fan and integral oil cooler. The engine was fitted with a high-capacity breather system to cope with the greater volumes of gas flow through the engine.
Early engines suffered several failures. Most serious were failed main and big-end bearings and splits or cracks in the block. In 1988 a new block and an improved design of bearing and bearing cap was fitted which solved these issues. The engine's higher internal temperatures meant that the cooling system also had to be maintained to a much higher standard than the earlier engines. Further changes were made in 1989, this time to the breather system to prevent oil being drawn into the air filter. Time has shown that these engines can turn in long service lives if maintained as required—like many early turbodiesels, a lack of maintenance causes failure.