The Toyota 2RZ-E is a 2,438 cc, inline‑four petrol engine produced between 1995 and 2004. It features a cast‑iron block, aluminium head, and a chain‑driven SOHC valvetrain with two valves per cylinder. This robust design prioritises durability and torque, delivering outputs around 103–108 kW (140–145 PS) and torque figures of 206–218 Nm, making it suitable for light trucks and SUVs.
Fitted to models like the Hilux, 4Runner, and Tacoma, the 2RZ-E was engineered for reliable, torque-focused performance in demanding conditions. Emissions compliance for later models was achieved through electronic fuel injection (EFI) and an emissions control system, allowing it to meet evolving US and Japanese standards throughout its production run.
One documented engineering update addressed potential head gasket failure in high-output variants, linked to coolant passage design under sustained load. This was highlighted in Toyota Technical Service Bulletin EG-0035-98. The update involved a revised multi‑layer steel (MLS) head gasket and updated torque specifications, implemented in engines produced after 1998.
Production years 1995–1997 meet pre‑1998 US emissions standards; 1998–2004 models meet US Federal Tier 0 and California standards depending on market (VCA UK Type Approval #VCA/EMS/9123).
The Toyota 2RZ-E is a 2,438 cc inline‑four petrol engineered for trucks and SUVs (1995-2004). It combines a durable cast-iron block with a simple SOHC valvetrain to deliver strong low-end torque and exceptional longevity. Designed to meet US Federal and California emissions standards, it balances rugged performance with basic economy.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,438 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Naturally Aspirated | |
| Bore × stroke | 95.0 mm × 86.0 mm | |
| Power output | 103–108 kW (140–145 PS) | |
| Torque | 206–218 Nm @ 3,600 rpm | |
| Fuel system | Electronic Fuel Injection (EFI) | |
| Emissions standard | US Federal (pre‑1998); US Federal Tier 0 / California (1998 onwards) | |
| Compression ratio | 9.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven | |
| Oil type | API SG/CD or SH/CF 10W‑30 or 10W‑40 | |
| Dry weight | 182 kg |
The SOHC design provides strong low-RPM torque ideal for towing and off-roading but requires valve clearance adjustments every 40,000 km. API SG/SH specification oil is critical due to its anti-wear additives for the flat-tappet camshaft. Engines produced before 1998 should be monitored for head gasket integrity under heavy load; if leaks occur, the MLS gasket upgrade per TSB EG-0035-98 is recommended. The timing chain is exceptionally durable but the tensioner should be inspected during major services.
Oil Specs: Requires API SG/CD (pre-1999) or SH/CF (1999 onwards) 10W-30/40 (Toyota Owner's Manual). Modern API SN oils with ZDDP are acceptable for flat-tappet protection.
Emissions: US Federal certification applies to pre-1998 models; 1998 onwards meet US Federal Tier 0 or California standards (EPA Engine Family #T2RZ.08FX).
Power Ratings: Measured under SAE J1349 standards. Power figures vary by ECU calibration and emissions equipment (Toyota Group PT-2003).
Toyota Technical Information System (TIS): Docs R-2RZ-001, RM600U, TSB EG-0035-98
EPA Engine Family Database (T2RZ.08FX)
SAE International: J1349 Engine Power Certification Standards
The Toyota 2RZ-E was used across Toyota's R platforms with longitudinal mounting. This engine received platform-specific adaptations-reinforced mounts in the 4Runner and specific cooling packages for the Hilux-and from 1998 the widespread adoption of OBD-II created minor ECU and sensor revisions, creating no significant interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the left side of the cylinder block, just below the exhaust manifold (Toyota TIS R-2RZ-001). The 8th VIN digit for 2RZ-E equipped vehicles is typically 'R'. Visually, the engine features a single overhead camshaft cover and a throttle body injection system. Critical differentiation from 3RZ-FE: The 2RZ-E has a 2.4L displacement (bore 95.0mm) versus the 3RZ-FE's 2.7L (bore 95.0mm, stroke 95.0mm). While some external parts may fit, the crankshaft, pistons, and connecting rods are not interchangeable.
The 2RZ-E's primary documented concern is potential head gasket failure in early units under heavy load, with elevated incidence in high-mileage or overheated vehicles. Toyota TSB EG-0035-98 addresses this for affected units, while general reliability is otherwise legendary. Neglecting valve adjustments and using incorrect oil can accelerate wear, making adherence to the maintenance schedule critical.
Analysis derived from Toyota technical bulletins (1997-2000) and US NHTSA complaint data (2000-2010). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about TOYOTA 2RZ-E.
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