Join Date: Jan 2006
Location: Barrington Hills, IL
Nothing to fix, thats completely normal. When you first start the engine, the pistons and rings are cold. When the pistons and rings are cold, the metal is contracted. As you progressively warm up the motor, the pistons and rings will expand, and then the noise goes away. Most people refer to this as piston slap, im guessing that this is the rattle that your speaking of.