2022 Editions Archives - UnderhoodService
Alternators and Ripple Voltage

The alternator produces an AC current that must be converted into DC current by way of a rectifier.

Forcing OBD II Vehicle Emission Monitors

Some vehicles have readiness issues when it comes to setting all the OBD II monitors.

The Do’s and Don’ts of Installing Spark Plugs

This article discusses the “conscious” steps you should perform during spark plug replacement.

What Caused The Turbo To Fail?

Up to 50% of turbocharger failures are due to oiling problems.

Valve Lifter Technology

Hydraulic lifters are precision-fit assemblies.

Hybrid Vehicle Fluid Maintenance

There are opportunities your shop can’t pass up just because the car or SUV has a hybrid badge on the back.

Plastic Timing Chain Guides

Timing chain guides are designed to wear, but the guides are designed to last the engine’s life.

Rough Running GM Vehicle

This condition may be caused by an internal circuit board fault within the throttle body.

Power Window Regulator and Motor Service

Power windows are great as long as they roll up and down when commanded to do so.

EV Opportunities

You are gaining and retaining many service opportunities with Evs.

Reflashing Power Supplies

A power supply to keep the system voltage consistent is a required piece of equipment to perform a reflash procedure.

OBDII Connectors

OBDII connectors serve as the main communication point between the technician and the vehicle.