When I start my car in the morning or after a long sit, soon as I crank the motor over I hear like slapping in the motor for about 1/2 second and then my car sounds normal. If so what is it?


S.J.S.

97Z A4, K&N Cold Air, Flowmaster Cat-Backs, airfoil, MAF, Eibach Pro Kit, March Pulleys, TB Bypass, Big as Hell 315's on back .

 

piston slap

 

TTT doesnt anyone help anymore???

 

TTT cummon pretty pleze hahahha

 

Normal piston slap, hyperutectic pistons do that also forged pistons will also, they contract when cold then expand when they warm up. Entirely normal.

Mine did that moreso with thinner oil or maybe it just doesent seem as loud now that I run mobil1 15W50?

 

hey LT1....no kiddin.....NORMAL? It's kinda loud, if its normal why didnt anyonw say anything. I was damn ready to breakdown my motor. geeze. I think I threw something though so I still am. But the slap was there for awhile.

 

Yup, normal just do a search for piston slap and you'll see.
Maybee try using heavier synthetic oil, it flows faster on startup , especially in cold weather.