knocking noise on the motor

[Gaona]

Im getting a wierd noise on the motor. Every time the Avy is cold (like in the mornings), and i don't let it heat up I hear a knocking noise on the motor. It goes away in a few seconds. Is this normal?

 

[DougD]

Yes, it's called piston slap.  Do a search for it

 

[vertabatt]

www.pistonslap.com/

 

[Gaona]

same happens to u guys?

 

[m02redl]

it's a pretty common problem Gaona

 

[m02redl]

here's a thread
5.3 knocking
by the way, what year/model is your av?
if you could put it in your sig it helps us to answer your questions

 

[m02redl]

Chevrolet Comments Officially On Cold Start Knock

Piston Slap issue Explained