I have a 98 Camry with a 2.2L 4 cyl engine. There is a metallic rapping noise (only way I can describe it) that sounds like it is coming from under the valve cover. It varies with the RPM of the engine, but also fades as the RPM goes over 3000. I have taken off the valve cover, and it looks like the exhaust camshaft has been replaced (not as varnish coated as intake camshaft). I checked the bucket shim clearances and adjusted a few that were out of spec (with new shims). The rapping is still there. I am stuck as to what else could be causing the noise.
Tuesday, August 20th, 2013 AT 9:52 AM