The Td4 engines
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- Category: Engines
- Last Updated on Sunday, 18 December 2011 14:00
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So far, there are two distinct engines used by Land Rover for Freelander models labelled as Td4. the Freelander 1 using a BMW engine, and the Freelander 2, a Ford/Peugeot-Citroen engine.
2001 - 2006 The BMW M47 based Td4
BMW M47 TUD20
Introduced at BMW in September 2001 and a development of the 1951cc BMW M47 D20, the BMW M47 TUD20 (standing for "technical update") is a four cylinder diesel engine, used in various BMW models, but also in Freelander 1 Td4 models.
This updated engine was expanded slightly to 1995 cc, it also introduced COMMON-RAIL technology similar to an M57 engine ramping up the torque, improving fuel consumption and giving more boost lower down the rev range, however it added 50 kg in extra weight and emissions were raised slightly. The M47 TUD20 was also fitted with twin balancer shafts to counteract the secondary balances inherent in a diesel four-cylinder engine.
Although an extremely well accomplished piece of engineering, the M47 TUD20 was not without it's flaws. A number of common failure points have been highlighted in the engines produced prior to the introduction of the M47 TU2D20, chief among which is 'swirl flap' mechanism employed within the inlet manifold. These consist of a number of butterfly valves within each individual inlet tract. These flaps are secured to an actuating rod via two small screws. It has become clear that over time these screws can come loose via vibration etc. When this happens they can end up being drawn into the respective cylinder, causing significant damage to piston, cylinder head and valves. If unlucky further damage can be caused to the turbo if the screw then makes its way through the exhaust valve into the manifold and subsequently into the turbo. These failures have occurred in such quantity that a number of specialist BMW magazines have featured articles on the problem including information on how to remove the swirl flaps. For those who wish to perform some preventive maintenance on the M47 TUD20 engine, there are companies who supply and/or fit blanking plugs to allow the removal of these swirl flaps altogether. Subsequent revisions of this engine involved the replacement of the mechanical method of securing these flaps by a one-piece moulded plastic flap.
BMW M47 TU2D20
The M47 TUD20 engine was updated in 2004 as the M47 TU2D20. Still at 1995 cc, it produced more power across the range and other engineering improvements were incorporated.
Details below are being researched with regards to the Freelander 1 version of the BMW M47 engine. This is currently on-going.
Engine Code: M47 TUD20, M47 TU2D20
Layout: 4-cylinder, in-line
Block/Head: unknown as yet
Valves: unknown as yet
Capacity: 1,995cc (121.7 cu. in)
Bore x stroke: unknown as yet
Compression ratio: unknown as yet
Fuel injection: unknown as yet
Induction: unknown as yet
Power: unknown as yet
Torque: unknown as yet
Production: 2001-2006
Used in: Land Rover Freelander 1.
2005 - The Duratorq TDCi (PSA DW Based) Td4
As part of a phased Ford/PSA diesel engine joint-venture, these four cylinder engines are sold under the Duratorq TDCi name by Ford, and as the HDi by Citroën and Peugeot. An evolution of the existing DW10/DW12 engine, the new engines have a traditional belt-driven system, moving away from the chain-driven camshafts of the previous generation (Puma) TDCi engines. These engines are the result of the fourth phase of the co-operation between PSA and Ford (initiated in 1998).
Both engines use all-new, third-generation common rail injection systems. The 2.0 litre engines have a system from Siemens and the 2.2 litre engines a system from Bosch. In both systems the injection pressure has been increased to 1800 bar. This higher injection pressure, associated with new piezo-electric injectors in which each nozzle is equipped with seven apertures (instead of five previously), allows the number of injections to be multiplied (potentially up to six per cycle) and ensures meticulous uniformity of the diesel injection spray pattern. As a result of this optimised air/diesel mix, combustion is more complete and more uniform, and therefore reduces emissions at source.
The 2.2 litre version is based on the PSA DW12 engine and with a capacity of 2179 cc. It has been engineered by Ford in England, as part of the fourth phase of the joint-venture agreement with PSA. These engines are manufactured in Ford's Dagenham engine plant. The engine features a 16-valve cylinder head with twin belt driven camshafts and utilises a variable geometry turbocharger with overboost function, rather than the twin turbo approach of Peugeot and Citroen. The result is a very respectable 175 PS (172 hp/129 kW) complete with 295 ft·lbf (400 N·m) of torque, although 310 ft·lbf (420 N·m) is temporarily available thanks to the transient overboost function.
In 2010 Ford and PSA revised the engine with a new turbocharger and a new power output of 200 PS with a torque of 420 N·m and even 450 N·m at overboost conditions while the emissions are rated at Euro 5 level. This engine, with some modifications, is the latest (as of 2011) engine being used for Land Rover Defender, replacing the Puma Duratorq ZSD 2.4 litre Euro 4 rated engine.
Details below are being researched with regards to the Euro 5 rated Freelander 2 version of the DW12 engine. This is currently on-going.
Engine Code: DW12, TD4 150PS
Layout: 4-cylinder, in-line, transverse
Block/Head: Compacted Graphite Iron (CGI)/ Alloy
Valves: 16-valve , DOHC, belt driven
Capacity: 2,179cc (132.97 cu. in)
Bore x stroke: 85mm x 96mm
Compression ratio: 15.8:1
Fuel injection: Bosch common rail fuel injection
Induction: Variable geometry turbocharger
Power: 150PS, 110kw
Torque: 420 Nm, 310lb ft
Production: 2006- present
Used in: Land Rover Freelander 1 (2006 -), Range Rover Evoque (2011 -), Land Rover Defender (2011 - ).
The SD4 version of the engine produces more power, at 190 PS (140kw), but the same torque as the TD4
If you can tell us more about these engines, please get in touch. Contact This email address is being protected from spambots. You need JavaScript enabled to view it.
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