Noises are difficult to diagnose.
According to your input, You may have to check for piston slap.
Piston slap noise is generally a hollow noise, bell- like noise/ sound, when the engine is cold.
Usually the the noise will disappear after the engine warms up du to the aluminum piston expanding faster than the cast iron.
To eliminate this idea, you have to help me:
before you start the car in the morning, remove the spark plugs and squirt a heavy oil on the top of the piston. Rotate the engine to allow the oil to seep pass the rings. Start the engine. If the noise is gone, the problem is probably piston slap.
Let me know, I will follow you up through this. :)
Monday, January 22nd, 2007 AT 11:20 PM