Hitchhikingmike
Explorer Addict
- Joined
- January 21, 2008
- Messages
- 1,490
- Reaction score
- 26
- City, State
- Dallas, Texas
- Year, Model & Trim Level
- '02 XLS
My SOHC makes noise from the heads only when the engine is warm. The sound cannot be heard in the cabin and is not unusually loud and does not grab your attention when the hood is shut. The engine has made this sound as long as I can remember, it might have gotten louder though.
Below is a video of a cold start. In the beginning you can hear that the engine is quiet. Snap to 3:07, when the engine is warm and you can hear sound from the heads. It sounds like there are pebbles and small rocks just being thrown around.
Engine has never had a mechanical problem before, has 88k miles and Amsoil has been used for the last 50k miles. Engine still gets good fuel mileage and has plenty of power.
I am aware of the chain rattles these engines tend to exhibit and wonder if my timing components might be loosening up. If they are, and this sound is a precursor of worse things to come, this summer is the time for me to pull the engine and refreshen the timing system before the Fall semester of school starts up.
General thoughts and comments welcomed.
Thanks.
Below is a video of a cold start. In the beginning you can hear that the engine is quiet. Snap to 3:07, when the engine is warm and you can hear sound from the heads. It sounds like there are pebbles and small rocks just being thrown around.
Engine has never had a mechanical problem before, has 88k miles and Amsoil has been used for the last 50k miles. Engine still gets good fuel mileage and has plenty of power.
I am aware of the chain rattles these engines tend to exhibit and wonder if my timing components might be loosening up. If they are, and this sound is a precursor of worse things to come, this summer is the time for me to pull the engine and refreshen the timing system before the Fall semester of school starts up.
General thoughts and comments welcomed.
Thanks.
