Piston slap can create a knocking noise from your engine that seems very concerning at first. But you should listen to expert ...
A knocking sound from the engine often triggers worst-case assumptions, but piston slap is a far more common—and usually less dangerous—culprit. It occurs when a piston lightly contacts the cylinder ...
Q: I have a 2003 Pontiac Vibe, which is basically a Toyota Matrix, with 135,000 miles on it. This past winter, on a cold start it would knock for a minute or three, depending on how cold. A friend who ...