2021 Editions Archives - Page 5 of 8 - UnderhoodService
The August Issue Is Available Now For Free

This issue includes features on air conditioning service, creative uses for your smoke machine and more.

Power Window Regulator Replacement

Blindly replacing a window regulator and motor assembly may not solve a customer’s problem.

Direct Injection and Turbochargers

Making more power with less displacement puts additional stress on the engine.

Modern Battery and Alternator Testing Methods

Old methods of testing a battery and alternator aren’t appropriate today. Do the job right to get the right results.

Fluid Maintenance Still Vital To Hybrids And Shop Success

Like conventional vehicles, hybrids still use fluids and maintenance will continue to be required.

Read Our July Digital Edition Magazine

Each issue includes business management articles from ShopOwner and many technical features.

Diesel Exhaust Fluid (DEF) Changes

Modern diesel exhaust systems are complex and they include multiple sub systems to keep exhaust clean.

10 Timing Belt Tips

Here are the some key installation and service tips to make your next timing belt job just a little easier.

Diagnosing Throttle-By-Wire Limp Modes

Throttle-by-wire allows engines to better utilize variable valve timing and direct injection for torque and power.

R1234yf Refrigerant Service

It is not a question of if but when you’ll have to deal with R1234yf refrigerant. Here’s what to expect.

ECM and PCM Calibration Numbers

Finding out if the vehicle has the latest version or calibration on a module is a required step.

P0299 and P0234 Turbocharger Diagnostics

Many things can change the performance of the turbocharger. But the turbocharger is rarely the source of the problem.