engine Archives - UnderhoodService
Dealing with Deposits to Boost Engine Life

Valvoline didn’t think an engine oil that removed deposits was possible … until they did it.

BMW Spark Plug Replacement

Here are a few things that you need to know before replacing spark plugs in a BMW.

Understanding Engine Misfire Codes

When the fuel/air mixture ignites, many factors must be met to pass a misfire monitor.

Forcing OBD II Vehicle Emission Monitors

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

Read The May Issue of ShopOwner Online

Every issue of ShopOwner includes technical and management information and articles.

Beyond the Warranty

What does it take to keep a car going for 120,000, 180,000 or 250,000 miles? The key is maintenance and inspection. 

Ignition Coil Output

To see inductance inside the primary windings, use an amp probe placed around the positive wire for the ignition coil.

The April Digital Edition of ShopOwner Is Now Online

Each issue includes management resources and technical content from Underhood Service.

The March Digital Edition of ShopOwner Is Now Online

Each issue includes technical content from Underhood Service.

Lifter Deactivation

The area of contact between the lifters and cam lobes is the highest loaded surface inside an engine.

Diesel Air Filter Replacement

Here are some diesel air filter replacement tips in order to keep these vehicles running as intended.

Cabin Air Filter Replacement

There are three major reasons to replace a cabin air filter in the winter.