How Car Engines Work

Understanding how car engines work is essential for diagnosing problems and performing accurate repairs. The internal combustion engine converts fuel into mechanical power using a combination of precisely timed components.

This category explains engine components and systems in detail, including pistons, crankshafts, camshafts, and timing mechanisms. It’s designed as a foundation for both beginners and experienced DIY mechanics.

What you’ll learn:

How engine components work together
Basic engine operation and combustion cycles
Common internal engine failures

If you want to understand engines before diving into repairs, this is your starting point.

👉 For diagnostics and repairs, see: Engine Maintenance & Troubleshooting

Cylinder Head Resurfacing – Getting The Correct Surface Finish

11/05/2025

Cylinder head resurfacing is a very common process today, especially with all the leaking head gaskets. Above all, cylinder head resurfacing is the most common machining operation, done in machine shops to date. However, many —READ-MORE

Valve Guide Wear – How to Identify and Reduce Oil Consumption

10/25/2025

Valve guide wear, refers to excessive clearance, between valve stem and guide. As the guide wears, the side to side movement, can cause valves to seat improperly. As a result, requiring you to need a —READ-MORE

Cylinder Power Balance Testing – Uncover Hidden Engine Issues

10/19/2025

So, performing a cylinder power balance test can help uncover hidden engine problems; which are commonly missed with other tests. This test can help diagnosing engine misfires, lack of power, or just a poor running —READ-MORE

Timing Belt Basics – Avoid the Unexpected Cost of Engine Damage

10/14/2025

A timing belt is one of those things that’s critical to replace; according to the auto manufacturer’s schedule. Timing belt replacement is most often between every 75,000 and 100,000 miles. So, check your owner’s manual —READ-MORE

Pushrods On G.M. 3.1-3.4 Engines – This Is Where Length Matters

09/26/2025

Exhaust and Intake Pushrods, on G.M. 3.1 and 3.4 engines are different lengths. So, quite often we still see bent push rods and valves, when they are mixed up. Consequently, Exhaust pushrods on G.M. 3.1 —READ-MORE

Crankshaft Thrust Bearing Failure – Causes And Remedies

09/16/2025

For years, both transmission and engine rebuilders, have struggled at times, to determine the cause, of crankshaft thrust bearing failure. Diagnosing a crankshaft thrust bearing failure, can sometimes be simple, but often is tricky. And, —READ-MORE

Variable Valve Timing (VVT) – Function And Its Advantages

09/12/2025

So, variable valve timing (VVT) adjusts the opening times and lift of the valves, to suit all operating conditions. This ensures ideal charge cycles, within a wide range of engine speeds and loads. Fuel consumption —READ-MORE

Engine Rebuild Reasons – Low Compression And Oil Consumption

08/29/2025

So, the most common reasons to do a engine rebuild are, loss of compression and or excessive engine oil consumption. Consequently, what’s important now, is to recognize the signs of trouble, before you end up —READ-MORE

Engine Stalling – Proper Troubleshooting And Maintenance

08/25/2025

Engine stalling problems, can be hard to find and are often, sensor or temperature related. And, are more likely to occur, during cold weather or when starting a cold engine. So, this kind of engine —READ-MORE

Vacuum Test Basics – What To Check And How To Do It

08/15/2025

First, doing a vacuum test, can tell you more about your engine, than you think. And, it is one of the easiest and least expensive ways, to check an engine for serious issues. So, engine —READ-MORE