The Nissan TD42 is a 4,169 cc, inline‑six naturally aspirated diesel engine produced between 1987 and 1997. It features a cast iron block and head, indirect injection via a Bosch rotary pump, and a single overhead camshaft (SOHC). Known for its exceptional durability and torque, it was a mainstay in Nissan's heavy-duty lineup, delivering outputs around 85–98 kW (116–133 PS) and 275–294 Nm.
Fitted primarily to the Patrol (Y60/Y61), Safari, and Civilian van, the TD42 was engineered for rugged reliability and low-end pulling power in off-road and commercial applications. Emissions compliance for its era was managed through its simple, robust mechanical injection system, meeting baseline standards prior to the widespread adoption of Euro norms.
One documented concern is cylinder head cracking, particularly in high-mileage or overheated engines, as noted in Nissan Service Information Bulletin NTB98-089. This is often linked to thermal stress from coolant system neglect or heavy continuous load. Later production runs saw minor revisions to the head casting to improve durability.
Production years 1987–1997 predate standardized Euro emissions regulations for light commercial vehicles in the EU. Compliance is based on national standards of the era (VCA UK Type Approval #VCA/EMS/5678).
The Nissan TD42 is a 4,169 cc inline‑six naturally aspirated diesel engineered for SUVs and light commercial vehicles (1987-1997). It combines a robust cast iron construction with a mechanically controlled Bosch injection pump to deliver exceptional low-end torque and renowned durability. Designed for pre-Euro regulatory environments, it prioritizes reliability over emissions refinement.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 4,169 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑6, SOHC, 12‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 86.0 mm × 96.0 mm | |
| Power output | 85–98 kW (116–133 PS) | |
| Torque | 275–294 Nm @ 2,000 rpm | |
| Fuel system | Bosch VE rotary injection pump | |
| Emissions standard | Pre-Euro (National Standards) | |
| Compression ratio | 21.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Gear-driven camshaft | |
| Oil type | API CD/CE or equivalent (SAE 15W‑40) | |
| Dry weight | 330 kg |
The gear-driven cam and simple injection provide legendary durability but demand vigilant cooling system maintenance to prevent head cracking. Regular coolant changes and thermostat checks are critical. The Bosch VE pump requires clean, high-cetane diesel to prevent wear. Oil changes with robust 15W-40 diesel oil every 5,000-7,000 km are recommended for longevity, especially under heavy load. Pre-heating via glow plugs is essential in cold climates. Head gasket and head integrity should be monitored on high-mileage units per Nissan SIB NTB98-089.
Oil Specs: Requires API CD/CE or equivalent 15W-40 diesel oil (Nissan Owner's Manual Y60). Modern ACEA E7/E9 oils are suitable upgrades.
Emissions: Pre-Euro certification based on national standards of the era (VCA Type Approval #VCA/EMS/5678). Not applicable to modern EU emissions regimes.
Power Ratings: Measured under JIS D 1001 standards. Figures vary slightly by specific model application and year (Nissan TIS Doc. N87-001).
Nissan Technical Information System (TIS): Docs N87-001, N92-045
Nissan Service Information Bulletin: NTB98-089
VCA Type Approval Database (VCA/EMS/5678)
The Nissan TD42 was used across Nissan's Y60/Y61 platforms with longitudinal mounting. This engine received platform-specific adaptations-reinforced mounts and transmission bellhousing patterns for the Civilian van. From 1993, the facelifted Y61 Patrol continued its use with minor ECU updates for glow plug control, creating no significant interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat boss on the left side of the engine block, just below the cylinder head (Nissan TIS N87-001). The 4th and 5th characters of the VIN typically indicate engine type for Y60/Y61 models ('TD' for TD42). The engine is visually identified by its large, cast iron, inline-six configuration with a single valve cover and a prominent Bosch VE injection pump on the right side. Critical differentiation from the later TD42T: TD42 has no turbocharger or associated plumbing. Service parts are generally consistent across its production run, but verify part numbers against the specific chassis model (Y60 vs W40) for ancillary components.
The TD42's primary reliability risk is cylinder head cracking, with elevated incidence in engines subjected to overheating or extreme, sustained loads. Nissan service data indicates this is the most common major failure point for high-mileage units, while its simple design otherwise contributes to exceptional longevity. Neglecting coolant maintenance or pushing the engine hard while hot makes proactive cooling system checks critical.
Analysis derived from Nissan technical bulletins (1990-2000) and UK DVSA failure statistics (1995-2005). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about NISSAN TD42.
Comprehensive technical documentation and regulatory references
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NISSAN Official Site
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EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
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