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1990–1995 Toyota 4Runner · 22RE Engine
22RE Engine
The four-cylinder that outlives the truck around it. Guides for keeping it that way.
The 22RE is under-powered and over-built, and most of what goes wrong with it is well understood: timing chain guides, the hydraulic tensioner, the cooling system, the idle circuit. The guides below are the ones people search for at two in the morning with the hood up. The parts list is short because the engine doesn't need much — but what it needs, it needs done right.
Parts
Guides
22RE Coolant Pipes: The Hidden Steel That Kills EnginesThe 22RE’s steel coolant pipes and heater lines corrode from the inside out. Where they hide, how they fail, the o-ring trick, and replacing them for 22RE EGR Cooler: The Carbon-Choked Part Nobody ChecksSomewhere between your 22RE's exhaust manifold and intake sits a part most owners have never touched: the EGR cooler.22RE Exhaust Manifold Crack: The Tick That Fades WarmThe 22RE exhaust manifold cracks — here’s the cold-start tick that identifies it, why studs snap, and how to replace it without a broken-bolt nightmarBoosting a 22RE: Turbo vs Supercharger, From ExperienceTurbocharging or supercharging a 22RE: what boost actually does to Toyota’s 2.4, why fuel supply decides the project, and the honest limits. 1990-199522RE Idle Speed: How to Adjust It (and When Not To)Setting 22RE idle speed the right way, why the screw is the last step not the first, and the vacuum leaks and sensors that fake a bad idle. 90-95 4Run22RE Oil Pump: Low Pressure, Read Before You ReplaceLow oil pressure on a 22RE: what the gauge is really telling you, when it’s the sender vs the pump, and why the pump job pairs with the timing cover. Rebuilding a 22RE: When It’s Worth It, When It Isn’tWhen a 22RE actually needs a rebuild vs a refresh: compression truth, piston slap, the head gasket question, and where rebuild money really goes. 90-922RE Timing Chain Replacement Interval: When, Why, and the Rattle22RE timing chain replacement interval is 90,000–100,000 miles. Why the guides break, why the hydraulic tensioner slowly fails over time, what the col22RE Valve Adjustment: The Tappet Tick, CuredThat sewing-machine tick from your 22RE is valves asking for adjustment. Why the 22RE needs it, what the tick means, and the patient shim-and-feeler j22RE vs. 3VZE: Which 2nd Gen 4Runner Engine Is Better?Four cylinders and forever, or six cylinders and head gaskets? The straight comparison between the 22RE and 3VZE, and which one you actually want.2nd Gen 4Runner Engine Showdown: 22R-E vs. 3VZ-EFor any enthusiast considering a 2nd Gen Toyota 4Runner for their next off-road project, one of the most critical decisions revolves around the engine2nd Gen 4Runner Maintenance Guide: How to Make Yours Last 300,000What actually kills a 2nd gen 4Runner and what keeps it alive past 300,000 miles: the 3VZ-E head gasket campaign, 22R-E timing chain, cooling, fluids DIY: Replacing the Fuel Pump and Filter on a 2nd Gen 4Runner 3VZE3vze fuel pump, 3vz fuel pump, 22re fuel pump, 2nd gen 4runner fuel pump, best 4runner fuel pump, e85 fuel pump.Stop the Leak! The Toyota 3VZ/22RE Power Steering delete kit!Stop the Leak: The Ultimate Guide to the Toyota 3VZ/22RE Power Steering Idle Up Valve Delete kit. 2nd Gen 4Runner Builds: Off-Roading Adventures Awai
Questions
When should the timing chain be replaced?
90,000–100,000 miles. The plastic guides wear and the hydraulic tensioner slowly starts to fail over time. Proper oil changes help prevent that. The timing chain guide below has the full picture.
Is the 22RE turbo-able?
People do it. The forced-induction guide below is honest about what it takes and what breaks.