Piston slap?

#1

My 2002 subaru forester is making a loud noise that the dealer says is “piston slap.” The dealer says that it will cost $3,000 plus to fix it. The dealer also said that, as long as I don’t mind the noise,the car could keep running for years.



Does this make sense? Should I really just ignore it?

#2

Piston slap was around in the non turbo 2.5L for a couple years. I don’t believe it has any longevity issues with their engines, just annoying if ID’ed correctly. The dealer should be well experienced in the symptom(s).

#3

If the loud noise goes away after the engine runs for a short time, then it could be piston slap. If the noise continues after the engine runs for a short period of time, then there may be a bigger issue.

Tester

#4

the noise is definitely worse when just starting/cold weather–