When you say header, are you referring to the exhaust manifold? If so, when the engine cools, the steel contracts. Is that what you may be hearing?
If possible, can you record the noise and upload it for me to hear? Also, you mentioned using the brakes causes the same sound. If I'm correct and it is the exhaust manifold, I'm not sure how the brakes would tie into that.
Let me know as much as you can. Does it happen only when the engine is off? Does it only happen when the brakes are applied? Anything you can think of that may help me diagnose this is appreciated.
Let me know.
Tuesday, March 7th, 2023 AT 6:31 PM