Getting and Running the 1986 Mitsubishi Montero
Most people who hear about this vehicle first time think it is some rugged jungle conqueror that never breaks. That assumption gets you stranded pretty fast. The 1990s were a different era of automotive engineering, and the Montero from that period shows it clearly on every panel and under every bolt. It was Mitsubishi's answer to the Jeep Cherokee and Toyota 4Runner, but it ended up carving its own niche through sheer simplicity rather than polish. The first generation Montero, known as the Derezza in some export markets, arrived in America in 1984 as a 1985 model year vehicle. By 1986, Mitsubishi had ironed out the early teething problems from the launch year and the truck settled into a reasonably reliable package. It used a body-on-frame design, part-time four-wheel drive with a two-speed transfer case, and a 2.6-liter inline-four engine rated at around 105 horsepower. That sounds underwhelming on paper but in practice the lightweight chassis and narrow body made it surprisingly capable when the pavement ended. I learned this the hard way back in 2012 when I inherited a friend's high-mileage Montero and took it up a trail in the Ozarks that supposedly was suitable for stock SUVs. The trail was actually three inches of mud over exposed limestone, and about four miles in the front differential began making a sound that no reasonable person ignores. The pinion seal had wept oil slowly for years until there was nothing left. I replaced it right there on the trail using a spare seal I kept in the truck along with some RTV and a socket set. Got it running again within forty minutes. That truck ran another fifty thousand miles after that before I finally sold it. Nothing fancy about it, just maintenance that most owners skip entirely.
Here is what most guides do not tell you about these vehicles. The part-time four-wheel drive system works fine in dry conditions but the binding effect in four-high on paved surfaces is brutal on the drivetrain. You will feel the steering wheel tug and the front tires hop if you engage 4WD on anything with traction. The correct practice is shifting into 4-Low only when you need the extra crawling torque, which means stopping the vehicle completely and engaging it while stationary. Some owners run it in 4-High anyway and wonder why their front driveline components fail prematurely. They do not fail from use, they fail from continuous binding stress. The suspension setup deserves attention too. The Montero used solid axles front and rear with leaf springs in the back and coil springs up front. This is old-school configuration that provides excellent articulation on rough terrain but delivers a truck-like ride quality on highway miles. If you plan to use this as a daily driver beyond a few thousand miles, budget for new shocks and probably a rear spring replacement. The original leaf packs sag noticeably after 150,000 miles and the ride deteriorates from there.
What to Check Before Buying One
Rust is the real killer, not engine failure or transmission issues. The frame rails, especially near the front suspension mounting points, develop surface rust that progresses inward quietly. A frame that looks solid from below but has converted those mounting bosses into weak points is sitting there waiting to crack under load. Bring a magnet and a flashlight and spend ten minutes examining every weld and bracket on the undercarriage. Anything that makes the magnet stick through flaky paint is probably fine. Anything where the magnet falls away from the surface because there is a gap of rust between the metal and the magnet is a problem you do not want to take on. The 2.6-liter engine, codenamed 4G54, is fundamentally adequate but not bulletproof. The timing belt should be replaced every 60,000 miles as a matter of routine, and since these are thirty-plus-year-old vehicles now, you should assume no one has done this recently. A broken timing belt on this interference engine will bend valves and ruin the day. Also inspect the cylinder head for cracks around the exhaust ports. Warping from overheating events is not uncommon on high-hour examples, and the repair cost approaches the value of many of these trucks. Transmission durability is generally good. The five-speed manual is robust if you replace the clutch before the disc is worn to the rivets. The automatic option, a three-speed, shifts like a three-speed and that is accurate description. It is adequate for highway cruising and light towing but struggles with anything heavier than a trailer full of firewood. If you find an example with the manual and low miles, that combination is worth prioritizing.
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Maintenance Realities
Parts availability is actually one of the stronger points for this vehicle. Mitsubishi produced millions of these globally and the platform shares components with the Dodge Colt and Eagle Summit in some areas. Engine parts come from countless aftermarket suppliers at reasonable prices. Suspension components are available through General Motors and NAPA catalogs. The main difficulty lies in finding quality body panels and interior trim pieces, which require hunting through salvage yards and online forums where dedicated owners trade them. The electrical system uses a simple single-wire design for most accessories with ground return through the chassis. This means troubleshooting is straightforward but also means that any corroded ground point can create mysterious intermittent issues. I have seen a Montero refuse to start because the main chassis ground strap behind the battery had corroded open. Cleaning the connection and replacing the strap solved it immediately. Do not chase sensors and modules for problems that a hundred dollars of wiring repair will fix. Fuel system maintenance matters more than most owners realize. The fuel tanks on these vehicles develop internal rust from condensation, especially if they sit unused for long periods. Disconnecting the fuel line and blowing compressed air through the tank outlet can remove loose debris before it reaches the carburetor or fuel injection components. On later models with electronic fuel injection, a clogged filter or contaminated tank will cause rough idle and hesitation that mimics sensor failure. Replace the filter first, always, before buying diagnostic equipment.
Is It Worth Your Time
Buy one if you want a simple, repairable offroad vehicle that teaches you about mechanical systems rather than hiding them behind plastic covers and computer modules. Buy one if you have access to basic tools and a weekend garage. Do not buy one if you expect comfort features, modern safety standards, or a vehicle that starts reliably every morning without diagnostic effort. The market for well-preserved first-generation Monteros has been climbing steadily. Clean examples with under 100,000 original miles command prices that seem high until you compare them to the cost of restoring a rusted high-mileage truck. Factor in roughly three to five thousand dollars for a thorough refresh that addresses suspension, brakes, seals, fluids, and timing components, and you quickly understand why condition matters enormously at purchase time. I still think about that trail in the Ozarks occasionally. Not because it was dramatic or impressive, but because it confirmed exactly what I already suspected about these vehicles. They are not complicated. They are not fragile. They are honest machines that demand honest maintenance and reward you accordingly. That is a rare combination at any price point.
