Nissan YD engine

The YD engine is a 2.2 L & 2.5 L I4 diesel engine from Nissan. It has a cast iron block & aluminium head with chain driven DOHC.

Winner of the FY 1998 Sho-Ene Taisho (The Energy Conservation Prize). The YD22DD is used in the Y11 Nissan AD van& W11 Expert. It is a non turbo engine utilising the VP44 electronic controlled rotary injection pump.

The YD22DDT is used in the X-Trail, N16 Almera. It features the VP44 electronic rotary injection system and wastegated turbochargers. The VP44 pump models are easily spotted due to a flat acoustic cover over the engine.

The YD22DDTi was a commonrail diesel introduced in 2001, during the first small facelift of the P12 Primera, N16 Almera and V10 Almera Tino. It is also fitted to the Nissan X-trail. The injection system is commonrail with a variable vane turbocharger is intercooled and produces the most power and torque of all the YD22 engines. Cars with this commonrail engine usually carry the DDTI badge. The commonrail version is easily distinguished from the VP44 model by the 4 injector bumps on the top of the acoustic cover.

Non intercooled versions of this engine were also available with a lower power rating.

This engine features the VP44 rotary injection pump and is turbocharged and intercooled. In the Presage/Bassara it is fitted sideways with a variable vane turbocharger (garrett GT1749V) and torque is limited to approximately 280 N·m (207 lb·ft) accommodate the 4 speed automatic gearbox attached. In the D22 Navara/Kingcab/Frontier the engine is essentially the same other than modifications to accessories, mounts and plumbing to accommodate the longitudinal engine layout. The turbo is a wastegated IHI RHF4 which is also intercooled. The stronger gearbox allows it to produce more torque than the Presage/Bassara version.

The model description YD25DDTi technically refers to the YD25 engines which use the VP44 rotary electronic injection pump and run injection lines to each cylinder. This DDTi engine was last used in the Presage/Bassara and the D22 navara.

The common rail versions of this engine are referred to in Europe as DCi. The commonrail engines are used in the D40 navara, late model D22 navara and the R51 pathfinder. This is the engine referred to below.

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