The rubber VVT oil line is a ticking time bomb that can burst at any moment, with catastrophic consequences for the engine. It must be replaced with a all-metal line. This how-to video starts by showing how to check your VVT line and verify whether it needs replacement. Then it covers every part number and every tool needed to remove and replace the line, from start to finish. The work is done on-car, with a spare engine out-of-car used to aid in visualization for hard-to-see areas.