replacement Archives - UnderhoodService
Spark Plug Replacement Intervals (VIDEO)

Be wary of spark plugs as they approach the end of their lifespan. This video is sponsored by Autolite.

Replace Parts Together (Video)

Replacing these parts together can save money in the long run. Sponsored by Carter.

Duramax 6.6L Turbocharger Replacement (VIDEO)

No matter the symptoms or damaged parts, the root cause of the failure must be diagnosed and resolved. Sponsored by Cardone.

What To Inspect Before Replacing The Serpentine Belt (VIDEO)

Friction between the belt and pulleys wears away at the belt. This video is sponsored by the Group Training Academy.

VIDEO: Replacement Long Block Engines

Don’t settle for “almost” – it matters where the engine is manufactured or remanufactured. Sponsored by ACDelco.

Spark Plug Replacement Basics: Removal, Installation And Choosing The Right Plug

Spark plug replacement is considered one of the least complicated tasks at a shop, but ignorance of what you are dealing with can get you into trouble.

Head Gasket Do’s And Don’ts

To ensure accurate torque values and to avoid cracking the cylinder block, clean any dust, dirt, oil and fluid from the cylinder block head bolt holes before installing the new head gasket and head bolts. Never lubricate the head bolts with a friction-modified oil. Unless otherwise specified, lightly lubricate the bolt threads with 30w non-detergent motor oil.

Gaskets
The Science Behind Precious Metal Spark Plugs

With the need to comply with ever-increasing efficiency and emission standards, auto manufacturers have been racing to raise the bar in spark plug performance over the past three decades. The use of precious metals like platinum and iridium in the manufacturing of spark plugs, as opposed to the use of nickel, has resulted in plugs that can last much longer and offer better performance than the spark plugs in circulation prior to the mid-1980s.

Spark plugs
Replacing Fuel Lines

As vehicles are lasting longer, the chances the fuel lines will spring a leak are increasing. The main reason metal fuel lines fail is corrosion, but most corrosion starts when abrasive materials start to remove the paint or coating on the line. This can occur at a mounting bracket or from ­debris kicked up from

Spark Plug Replacement

Every time a spark plug fires, the spark burns a few molecules of metal off the plug’s electrodes. Over time, this eats away the electrodes and rounds off their sharp edges. The erosion gradually increases the gap between the electrodes, which, in turn, increases the firing voltage required to generate a spark. Eventually the point

spark plug replacement
Be Careful When Replacing That Diesel Air Filter

Modern passenger and light-duty diesels with ECMs have mass airflow sensors and precisely control fuel ­delivery. Key to the efficiency and lifespan of the diesel engine is the diesel air filter. A restricted air filter will not affect fuel economy but will drastically affect power output. We asked prominent filter manufacturers for some diesel air

diesel air filter replacement gauge
Replacing a Faulty Ignition Coil

After a faulty ignition coil is diagnosed and replacement is determined, best practices are essential. Here is a list of tech tips when performing ignition coil replacements. • Coils shouldn’t have any visible damage and the boot should be fully seated. While assembling coils to the engine, disregard the coil if you notice any visible

Delphi Ignition Coil