Jeep YJ Wrangler 4.2L 6 Cylinder Engine Parts | 4WD.com
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 YJ Wrangler 4.2L 6 cylinder Engine Parts

Make Sure It Fits Your Vehicle

Factory style replacement 4.2L 258 6 cylinder engine parts for your 1987-95 YJ Wrangler.

The Jeep Wrangler is a beast. Based on the rugged Jeeps used during WWII, they were born to eat up the rough stuff and conquer any terrain. If you've got a 4.2L inline six-cylinder 1987 Jeep Wrangler engine, you can beef it up and head to the bog or Slickrock knowing it'll bring you home.

Fuel Efficiency
Peak torque and horsepower for the Jeep 4.2 engine is lower than the 2.5L option the Wrangler may have come with, which means it's more fuel efficient. If you're climbing steep grades, have heavy tow-loads or are heading to altitudes above 8000 feet, the heftier 4.2 maintains performance better than the 2.5L due to reduced engine power in those conditions.

The 1990 Jeep Wrangler 6-Cylinder engine, soft top and removable doors is classic Jeep. Since that model came from the factory with an inline six, the ride is smoother than a V6, with comparable MPG.  If you have the budget and want to go all-in, a diesel turbo can be dropped in to improve fuel economy.

Replacement Parts
Get and exploded 1990 Jeep Wrangler engine diagram if you're upgrading, repairing or replacing the motor yourself; this enables you to see each part and component all at once, detailing placement. It also comes in handy when scouring the Internet for the right replacement parts. Engine specifications change every few years, and if you picked the Jeep up from Craig's list or a used car dealer, it might already have modifications. Going from a manual transmission to automatic and a straight 4-engine to a straight 6-engine may require adapters for the transitions to go smoothly.

At 4WD.com, we have the parts you need at the best prices around. If you find a better price within 90 days of purchase, we'll refund the difference. Go online and place your order today. Our warehouses are stocked with thousands of name brand parts, ready to ship and get you back on the trail.

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