How to Check Compression on a Diesel Engine
Learn how to check compression on a diesel engine using relative and mechanical tests, read results accurately, and know when to call a shop.
Allison Transmission Fluid: The Right Spec, Interval, and Capacity by Series
Find the right Allison transmission fluid spec, change intervals, and capacity by series. TES 668, TES 295, TES 468 explained with exact quart figures.
Do You Need a CDL for Air Brakes?
Do you need a CDL for air brakes? No – learn the exact weight thresholds, L and Z restriction codes, and when non-CDL drivers can legally operate air
Can You Use Starter Fluid in a Diesel Engine? Usually No, and Here’s What to Check Instead
Learn when starter fluid diesel engine use is prohibited, what damage it causes, and what safe cold-start alternatives actually fix the problem.
What Is a Dual Air Brake System?
Learn what a dual air brake system is, how its two circuits protect heavy trucks, what the gauges tell you, and what to do if one circuit fails.
Why Do Diesel Engines Blow Black Smoke?
Learn why diesel engines blow black smoke, what the 5 main causes are, and how a proper diagnosis works before anyone touches a turbo or injectors.