Re: New Oil, Old look...new sound?
Hey Fetch!
As Barry said, it's not a sound you want to hear, and hard to diagnose without hearing it firsthand. How's your oil pressure? It is possible to have a loose rod bearing, but that makes a "clattering" sound which increases in intensity when the engine is revved up quickly, and decreases in intensity when the throttle is released. A main bearing noise is noticed as more of a "thud" type of noise that would be more consistent with a steadily beating heart--think of it as a steady thump, thump, thump which will remain constant, and go up, or down depending on engine speed. You didn't break anything when you changed the oil. Get a good mechanic friend of yours to have a listen. He will be able to give you an idea what may be wrong with your engine.
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