PSA XUD

:"See also PSA XU engine for the related gasoline variant"The PSA XUD is a Diesel engine designed and built by PSA - Peugeot and Citroën. It is an Indirect Injection (IDI) engine, that uses a version of the Ricardo Consulting Engineers "Ricardo Comet" prechamber cylinder head design. The engine comes in 1769cc 1.8 N/A, 1.8 Turbo, 1905cc 1.9 N/A, 1.9 Turbo, 2.1 12 valve N/A and Turbo and 2.5 Turbo configurations, and was the predecessor to the HDI range of engines (developed jointly between Ford and PSA).

The XUD was available with either SOHC or 12-valve DOHC heads. It was mainly applied transversally in front wheel drive vehicles, tilted by 30°. However, some applications in non-PSA vehicles had the engine installed longitudinally, with rear wheel drive.

Displacement ranged between 1769 and 2138 cc, and all XU diesel engines had a stroke of 88 mm (3.5 in) or 92 mm (3.6 in). The former was shared with the XU9. Bore sizes ranged from 80 mm (3.1 in) to 86 mm (3.4 in), some shared with other XU engines.

Upon its release the engine was noted as one of the best Diesel engines (for cars and light vans) in the world with its high power output and refinement it made all other diesel engines seem agricultural . However if the cooling system is neglected (or improperly bled after filling) the engine had a tendency to blow its head gasket; coolant changes on this engine are critical.

The engine when accompanied by a Bosch fuel pump can run on SVO (pure vegetable oil). The viscosity of vegetable oil when cold is too great for rotary injection pumps (in particular the weak Lucas pumps), preventing it acting as a lubricant and seizing up the distributor/rotary injection pump. In order to reduce the viscosity of the SVO it should be heated to engine coolant operating temperature, typically with a two tank system on order to start and shutdown on diesel or bio-diesel.

XUD7

The XUD7 had a displacement of 1.8 L (1769 cc), with a bore of 80 mm (3.1 in) and a stroke of 88 mm (3.5 in). Output was 60 PS (59 hp/44 kW) for the naturally aspirated version or 78 PS (77 hp/57 kW) for the turbocharged model. An intercooled turbocharged version was introduced later with 90 PS.

Vehicles

The engine has been installed into the following vehicles:-

*Auverland A3
*Citroën BX
*Citroën Visa
*Citroën C15
*Citroën ZX
*Citroën Xsara
*Citroën Berlingo
*Citroën Xantia
*Citroën XM
*Citroën Synergie/Fiat Ulysse/Peugeot 806
*FSO Polonez/Caro
*Lada Niva
*LDV Pilot and LDV 200 vans
*Peugeot 205
*Peugeot 305
*Peugeot 306 (phase 1 and 1.9 phase 2)
*Peugeot 309
*Peugeot 405
*Peugeot 406
*Peugeot 605
*Suzuki Baleno
*Talbot Horizon
*Rover 200
*Rover 400

Note:Rover 100/Metro, Peugeot 106, Citroën AX diesels used the much physically smaller TUD diesel engines, developed from the petrol PSA TU engine series.

References

* [http://www.autoweb-france.com/index.php?rub=22&cat=3 Guide des moteurs Peugeot Citroën] (in French)