We may receive a commission on purchases made from links. When it comes to engine care 101, a spark plug replacement — also referred to as a tune-up — is an essential task. Spark plugs ...

Most manufacturers suggest spark plugs (and wires, if you're being thorough) be replaced between 30,000 and 100,000 miles depending on the vehicle and use case. Pulling a single plug is usually a ...

When, though, and why? First, let's define what a spark plug is, why it's important, and why it fails. Internal combustion engines need three basic elements to work — fuel, air, and spark.

A search on the internet suggests that over time galvanic corrosion between the steel spark plug threads and the aluminum cylinder heads could make removal of the plugs difficult but the anodic ...