Rattling when idling - Toyota Nation Forum : Toyota Car and Truck Forums

budking686 · 02-28-2002, 10:10 PM

I have a large rattling sound when my car is idling when it is cold...This sound goes away when the car warms up...I have looked at the whole car to see what is making the nose...It sounds like something is loose...I tightened everything that I could see but still cannot figure it out...Any ideas? It is coming from the front of the car around the engine area somewhere?

WeApOnX · 03-01-2002, 10:42 AM

do u have and mods on it. becuase sometimes that can be thep problem. so go check wut mods u have and i can tell u

erfan · 03-01-2002, 11:27 AM

You have a condition that is called piston slap, it happens when you first start the car in the morning and goes away when warm because the piston in the cylinder is aluminum and your bore has a cast iron skirt. The piston has excessive clearance and it will rattle and bang around from side to side in the bore till the engine warms up and the piston expands and fills up the void and the slapping goes away. It will over time damage your bore and the rings, but i would not worry too much about it for a while.

tightcamry129 · 03-25-2004, 05:28 AM

Quote:

Originally posted by erfan
You have a condition that is called piston slap, it happens when you first start the car in the morning and goes away when warm because the piston in the cylinder is aluminum and your bore has a cast iron skirt. The piston has excessive clearance and it will rattle and bang around from side to side in the bore till the engine warms up and the piston expands and fills up the void and the slapping goes away. It will over time damage your bore and the rings, but i would not worry too much about it for a while.

i have this same problem on my gen 4. Do any of you have this same problem? Does toyota know of this problem? maybe they had a re-call or something...