In an earlier post, Steve mentioned that timing chain noise is RPM sensitive. My car is a '96 Sentra. What RPM range? Low (curb idle) or driving 3000 - 5000 Range? Just curious, I've been hearing a rattling noise from the engine compartment somewhere since May 03. It's only at curb idle. Once RPM's increase, it completely goes away. I've been thinking it's aluminum sheild or something along that line. Its not getting worse.
Paul