Timing Chain Kit Water&Oil Pump for GMC Terrain Chevy Equinox Malibu Buick 2.4L

Timing Chain Kit+Oil Pump+water Pump +Cam Phasers+VVT Valves For GM Ecotec 2.0L 2.4L. In order for your engine to fire, the timing chain must smoothly rotate around the gears without hesitation. Your car backfires.