Original GM Engine Parts

What are All the Main Parts of an Engine?

There are many. The list includes everything from intake and exhaust valves, pistons, and spark plugs to valve covers, a camshaft, a crankshaft, and a cylinder head. They work with drive shafts and a transmission, plus an oil pan or sump. Parts like gears, bearings, sprockets, and rings ensure the engine not only fits together properly but also runs right.

What Does Each Part of an Engine Do?

The intake valves regulate the ratio of air to fuel in the engine, the pistons pressurize it, the spark plugs ignite it, helping to crank (i.e., start) the engine, and exhaust valves regulate the fumes. Valve covers protect the valves, while the camshaft helps make sure the latter open and close the way they should. The cylinder head helps keep gases and oil from leaking.

The crankshaft, however, transforms engine power into rotation -- motion that the drive shafts and transmission use to turn a vehicle's wheels and spin its tires. The oil pan or oil sump stores motor oil, which the engine uses to lubricate everything.

What are the Signs of an Engine or its Parts Going Out?

They range widely. Look for dashboard warnings, like Check Engine, abnormally high exhaust emissions, a drop in fuel efficiency, and problems accelerating. Your vehicle may also take longer than usual to warm up, it may idle roughly or stall, or you may not be able to start it at all.

If you see any of them, do an engine inspection. Replace any parts needed.

Why Buy Genuine OEM Engine Parts?

They're designed to work with your brand's models right from the start, guaranteed. It follows that they'll fit what you drive.

Where Can I Order Replacement Engine Parts?

Our online store. Finding what you need in our catalog is easy. Just browse by your make, model, and year. Buy now and we'll ship and deliver fast, directly to your door.