YACT: Piston slap?

[idNut]

Ever heard of this? My dad's '90 Oldsmobile Cutlass Ciera supposedly has it says a mechanic at a performance shoppe he visits frequently. Basically it's a tapping in the motor of the pistons when he puts on the gas. It's pretty damn annoying but it goes away after the car warms up. My car buddy thinks it a gasket problem but I'm not sure.

 

[Howard]

Maybe the pistons changed size.

 

[Howard]

Have you tried higher octane?

 

[CraigRT]

some cars do it normally... my car does it a little. and my old car did it a lot.

(it's a thing with chrysler 4 bangers)

 

[idNut]

Originally posted by: Howard
Have you tried higher octane?

Yep, premium doesn't change a thing. Red Line oil (synthetic) has helped a little bit.

 

[RU482]

in GM's 3.1L V6 it's pretty common...is that what motor the car has?

 

[idNut]

Originally posted by: redly1
in GM's 3.1L V6 it's pretty common...is that what motor the car has?

Nah, 2.5L 4-banger.