| Nissan TD engine | |
| Manufacturer: | Nissan |
| Production: | 1986-present |
| Configuration: | Inline-4 & Inline-6 |
| Valvetrain: | OHV |
| Fueltype: | Diesel |
| Fuelsystem: | swirl chamber Semi-electronic fuel injection |
| Coolingsystem: | Water-cooled |
| Turbocharger: | On some versions |
| Displacement: | NaN1NaN1 |
| Power: | NaN0NaN0 |
| Predecessor: | Nissan SD engine |
| Successor: | Nissan QD engine Nissan ZD engine |
The Nissan TD series is a series of diesel engines manufactured by Nissan. All TD-series engines are inline engines; most versions are four-cylinders aside from the six-cylinder TD42. They have cast iron blocks and crossflow heads; the combustion chamber design is a swirl-chamber design with indirect injection and a gear driven cam.[1] The valves are pushrod-actuated, and the engine has two valves per cylinder;[2] the camshaft is driven by a set of gears.[1] Of a simple, somewhat old-fashioned construction, the engines are generally durable if not very powerful.[1] [3] [4]
The TD23 has a bore and stroke of NaNmm and thus displaces .[5] Its compression ratio is 22.0:1. It is the least common of the TD series engines, and ended production around 1995.[5] [6]
This engine was installed in the 1987-1992 Nissan Pickup (D21); it was also used in the 1986-1988 E24 series Nissan Caravan.[6] It replaced the earlier SD23 engine in Nissan Atlas 1-ton trucks in 1986.[8]
The TD25's bore and stroke are NaNmm, giving . Period reviewers referred to the unit as "thoroughly viceless" and "a bit bland".[3] This engine was also used by JASO, the Japanese Automotive Standards Organization, for their diesel oil Detergency Test procedure (M 336:1998) from 1998 until engine assemblies and parts became unavailable in 2009.[9] [10]
It is applied to the following vehicle(s):
It has been used in the 1990–present Nissan Cedric YPY31, the Nissan Navara D21 series, and the 1-ton Nissan Atlas F23 series from 1995 to 1999 (sold as the Cabstar in Europe and certain other export markets). It was also used in the Nissan Caravan/Urvan (E24).[3]
Bore and stroke are NaNmm giving . Maximum power of the naturally aspirated model is at 4,300 rpm.[12] A turbocharged version of the TD27 was introduced in 1988.[4]
This engine was also exported to the United Kingdom and fitted to LTI's Fairway series, coupled to manual or automatic transmissions also supplied by Nissan.[13] The low-stressed naturally aspirated engine has a strong reputation for reliability.[4] The General Secretary of Britain's Licensed Taxi Drivers' Association (LTDA) referred to the TD27 as "one of the greatest engines ever put in a cab."[14] It was chosen after extensive testing by engineering consultants Ricardo PLC. The company offset the cost of importing engines from Japan by Nissan agreeing to sell 200 Fairways in Japan every year under the "Big Ben" name.[2] The TD27 continued to be installed on the succeeding TX1 series.[14]
The TD27 was mainly fitted to a number of Nissan light duty commercial vehicles and was used as the most common diesel option in Nissan Homy, Caravan, and Urvan vans. Along with the TD23 and TD25, it was also fitted to the D21 series Datsun Truck (also known as Nissan Pickup, Navara, etcetera). The turbocharged versions were also fitted to the Nissan Caravan and its various rebadgings, to the Nissan/Datsun Pickup, the Nissan Terrano SUV (D21 as well as the succeeding R50), and to the Nissan Terrano II (R20; sold as the Mistral in Japan).
The power range of the regular turbocharged versions (TD27T; built from 1985 until 2007) range from depending on fitment; when fitted with an intercooler (TD27Ti) power increases to .[15] The most powerful TD27ETi model, introduced in 1995 and built until 2001, is intercooled, and has an electronically controlled distributor-type fuel injection pump. The system was called "electronically controlled fuel injection" by Nissan at the time.[16]
The TD42 measures ; it's a square engine and the bore and stroke are . Its fuel-injection pump is mechanically controlled. Early models naturally aspirated engines have a silver cylinder head cover ("silvertop"), while later naturally aspirated and all turbo models are blacktops. At some period during 1995~ the colour changed. Since 1988, Nissan Diesel Industrial Engines also manufactured this model for use in forklifts; the company building these (and the industrial versions of the TD25/TD27) changed name to Nissan Industrial Engine Manufacturing (NIEM) in 1995 and became Global Component Technologies (GCT) in 2015 - at which point the TD-series engines remained in production for forklift use.[17] Old-fashioned but beloved for its ruggedness, relabiltiy and relative ease of being able to be turbocharged, the TD42 is not particularly fuel efficient and may be subject to cooling issues when not properly maintained.[1]
The naturally aspirated versions of the TD42 produce from depending on market, fitment, and measuring methods. It has been installed in the Nissan Civilian series (W40, W41) and the Nissan Safari/Patrol (Y60/61). Original engines from 1987-07/1996 were fitted with 28mm gudgeon pins whilst from 08/1996 onwards were fitted with 30mm pins. Early models should have their conrods replaced if turbocharging to the updated 30mm option, pistons and piston oil squirters must also be replaced to suit turbo applications. The rear seal also changed from a conventional style to a unitized style around 09/1997.
The TD42T is the turbocharged version of the aforementioned TD42. It was available from 1993. Nissan revised the piston design to accommodate the forced induction by adding extended oil squirters and oil cooling the pistons. Crankshafts were also updated to suit turbo engines. The fuel pumps were upgraded to an 11mm plunger style on these models to handle the increase of fuel supply needed for the turbo application.
These engines have been fitted with a factory intercooler from the end of 2002 to 2007. In February 2003, this version received electronic control of injection timing; this increased the torque output to,[1] equivalent to a BMEP of 1.09 MPa. Power outputs of the turbocharged models range from depending on fitment, model, and market. These are the most sort after model of engine being the strongest internals and factory intercooled. Still highly valued due to their simplicity and reliability, these engines have a strong following in the remote touring/4wding market. Aftermarket support is extensive for the TD42 with many options available both in OE and performance applications. Nissan ended production in 2007 due to incoming emissions restrictions where it was replaced in most applications by the ZD30 family.
