This is my well maintained 98 Cavalier 2.2L with 270,000 miles. Original engine. I'm just now noticing this sound, though it has probably existed for a while. My girlfriend uses is for commuting. The car had a noisy accessory bearing under the hood for a very long time, just loud enough to cover this up, not loud enough to make me worry about chasing it down and fixing it. I did finally fix it recently. Tonight I started the car in a parking garage, got out for something, and heard this light tap. I drove the car to my house (1/4 mile) and took the video in the driveway. It's more audible under the engine where I placed my phone to record. It is perhaps a bit more defined hearing it in person.
My guess is a little piston slap.
Currently running QSUD 5w30/PureOne (recently changed, usually run PZHM)
My guess is a little piston slap.
Currently running QSUD 5w30/PureOne (recently changed, usually run PZHM)