Home › Blog – Under The Hood

How Gearhead Engines Provides Full Technical Documentation

Transparency You Can See  When you buy a remanufactured engine, you shouldn’t have to take someone’s word for its quality. You deserve to see the proof. That’s why Gearhead Engines uses full technical documentation with every unit we build—including detailed build sheets and test results for your exact engine.  These records confirm your engine was properly assembled, verified, and tested before it shipped. It’s a level of service that most brokered suppliers … Read more

Home › Blog – Under The Hood

The Smart Investment That Drives You Further

When it’s time to replace an engine, you have two choices — buy new or buy smart.  At Gearhead Engines, we’ve helped drivers save money and gain peace of mind with remanufactured engines that perform like new — at a fraction of the cost.  Our process isn’t a patch job. Each engine is completely rebuilt to OEM standards, tested for performance, and backed by a nationwide warranty. It’s how … Read more

Home › Blog – Under The Hood

The Power of Proven Support

Buying an engine shouldn’t be a guessing game. At Gearhead Engines, we believe the process should be as dependable as the products we build.  That’s why every customer — whether a professional installer or a weekend restorer — gets real support from real people. Our U.S.-based team is made up of experienced technicians and service specialists who understand engines inside … Read more

Home › Blog – Under The Hood

The Hands Behind Every Engine

Every Gearhead engine begins with something no computer can replicate — experience.  At Gearhead Engines, our technicians don’t just follow a checklist. They apply decades of hands-on knowledge, precision machining, and pride in their work to every remanufactured engine we produce.  Across our seven national manufacturing plants, we remanufacture thousands of engines, transmissions, and powertrain components daily, each one disassembled, cleaned, machined, and … Read more

Home › Blog – Under The Hood

GMC Jimmy, S15 Jimmy, and Typhoon Engines

The GMC Jimmy and S15 Jimmy were trusted compact SUVs known for their rugged dependability, while the rare GMC Typhoon brought turbocharged performance and sports-car handling to the SUV world.  Common Problems  Vacuum leaks and sensor failures  Turbocharger wear on Typhoon models  Intake manifold gasket leaks  Timing chain stretch in high-mileage engines  Cooling system corrosion  … Read more

Home › Blog – Under The Hood

Your Guide to Buick Replacement Engines

Your Guide to Buick Replacement Engines: Models, Performance, and Reliable Remanufactured Options Buick vehicles are known for comfort, smooth ride quality, and dependable performance. When the engine starts to fail, replacing the vehicle is not always the best option. A quality remanufactured engine can help extend the life of your Buick at a fraction of … Read more

Home › Blog – Under The Hood

Buick Riviera Remanufactured Engine

Buick Riviera Remanufactured Engine The Buick Riviera represents timeless luxury and American design excellence. From its dramatic 1960s curves to the sleek 1990s coupe, the Riviera remains a Buick icon. Its powertrain — typically the bulletproof 3.8L V6 — delivered strong, smooth acceleration. Over time, however, wear and tear can compromise performance. Gearhead Engines restores … Read more

Home › Blog – Under The Hood

GMC T6500, T7500, W3500, W4500 Forward Engines

GMC’s T and W-Series trucks represented the brand’s dedication to medium-duty performance, offering diesel and gasoline options for hauling, towing, and vocational work. These trucks were staples for commercial fleets needing dependable power and long service life.  Common Problems  Injector and fuel-pump wear on high-mileage diesel engines  Turbocharger degradation over time  Crankshaft seal leaks under heavy-duty use  … Read more

Home › Blog – Under The Hood

GMC Sprint and Suburban Engines

From the car-like Sprint of the 1970s to the family-friendly Suburban SUVs, GMC has delivered versatility and performance across decades. These vehicles embody GMC’s balance of comfort and power, with V6 and V8 options that defined reliability for generations.  Common Problems  Head-gasket leaks over time  Oil pan corrosion in older models  Timing-chain stretching at high mileage  Sensor … Read more

Home › Blog – Under The Hood

GMC P15–P3500 Van Series Engines

The GMC P-Series vans served as the backbone of commercial fleets across North America, trusted for decades in delivery, utility, and service work. Known for their rugged chassis and dependable powerplants, they kept businesses moving mile after mile.  Common Problems  Oil leaks due to worn seals and gaskets  Overheating from aging cooling systems  Fuel-system corrosion … Read more