How long can an engine with piston slap last?

guti said:

Hi everyone, I am new to the forum and looking forward to learn more about my vehicle.

I have a question: Does anybody have an idea of how long these engines can last with piston slap already noticeable.

My car has over 100,000 miles and recently started to slap on the no. 3 piston. It is almost unnoticeable after warm-up.
Does anybody know how long these engines can last after developing piston slap?

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I purchased my sedan new in May of 2009. In Dec. of that year, at 5600 miles, it started making slight noise that sounded to me like a piston slap, and was brought into the dealer. At that time I was told the noise was an "injection pulse sound" and was normal. Each winter, the noise got louder and loud, and I brought it back to the dealer and left it overnight so they could cold start it today. The tech listened to the engine and agreed that a the noise was in fact a piston slap, and the dealer agreed to install a short block under warranty. Every bit of maintenance service was done at the dealership, and there was no question of any lack of proper care. As other posters have state, some engines will run over 100,000 miles with that condition, and others will self destruct in 30,000-40,000 miles. Based on the intensity of the noise in my car, I don't think it had too much more mileage left before it would have bit the dust. Good luck with your vehicle.