1984-1995 Toyota 4runner 2.4L 22R-E 4-Cylinder Engine Motor 22r 22re 4 Runner

The Toyota 22R-E is the powerplant that put the 4Runner on the map. In the first and second-generation 4Runners (1984–1995), this engine was prized for its ability to survive extreme inclines and high-mileage abuse. Because the 4Runner is heavier than the standard Toyota Pickup, maintaining the health of this 2.4L motor is critical for off-road performance.

Here is everything you need to know when sourcing a replacement motor for your classic 4Runner.

 Engine Specifications

The 22R-E is a SOHC (Single Overhead Cam) engine. While its horsepower numbers seem modest by today’s standards, its reliability is legendary.

 Identifying the Correct Engine

22R vs. 22R-E

• 22R: Carbureted. Common in early 1984 4Runners and “base” models.

• 22R-E: Fuel Injected. The “E” stands for EFI (Electronic Fuel Injection). This is the standard for most 4Runners.

• Compatibility: If you are buying a long block, the block and head are largely the same, but you must swap your EFI-specific intake manifold and sensors onto the new block.

The “Laser Block” (1985–1995)

If you have a 1984 4Runner, you likely have the “Early” block. From 1985 onward, Toyota moved to the “Laser Block,” which featured a slightly shorter deck height.

• Pro Tip: If you are swapping an engine into an ’84, ensure you match the timing cover and head, as the early and late versions do not mix easily.

 Why 4Runner Owners Love the 22R-E

1. Low-End Torque for Crawling

The 22R-E hits its peak torque at just 3,400 RPM. For 4Runner owners who take their vehicles off-road, this means you have plenty of “grunt” for climbing obstacles without needing to redline the engine.

2. High-Altitude Reliability

The EFI system in the 22R-E automatically adjusts for air density. Unlike the carbureted 22R, the 22R-E won’t “bog down” or stall when you’re driving through high mountain passes.

3. Ease of Repair

The 4Runner engine bay is famously spacious with a 4-cylinder installed. Most components—like the starter, alternator, and spark plugs—are accessible with basic hand tools, making it a favorite for DIY mechanics.

 Critical Maintenance: The Timing Chain

The number one killer of 22R-E engines is the timing chain guides.

• The Problem: The stock guides are plastic. When they break, the chain slaps against the aluminum timing cover.

• The Consequence: The chain eventually wears a hole into the water passage, mixing coolant with your oil.

• The Solution: When buying a replacement engine or long block, insist on steel-backed timing chain guides. This replaces the plastic with a metal-reinforced part that prevents catastrophic failure.

 Buyer’s Checklist for Long Blocks

If you are purchasing a long block with No Core Charge, look for these quality markers:

• New Cylinder Head: Many builders use a brand-new casting to avoid the hairline cracks common in high-mileage 22R-E heads.

• Hardened Valve Seats: Essential for longevity, especially if you plan on long highway trips at high RPMs.

• New Oil Pump: The 22R-E is very sensitive to oil pressure for timing chain tension; always start a fresh motor with a new pump.

Fun Fact: The 22R-E is so reliable that many owners report reaching the 500,000-mile club with nothing more than regular oil changes and a single timing chain service!