I bought a 2007 Toyota Camry Solara Convertible SLE (V6, 3MZ-FE) with 48K miles. Because of the vehicle’s age, I had the timing belt and accessories (Aisin TKT-026 Kit) replaced by a reputable mechanic. I noted a chirping/squealing noise originating from the upper timing belt cover only when the engine is at normal operating temperature and not when it is cold. Based on his research, the mechanic felt that the new timing belt (Mitsubishi) was the culprit and it should be replaced with an OEM belt. This was done and all components were examined and cleaned. The noise came back. When pressing the upper part of the timing belt housing toward the engine, the noise diminishes and with strong enough pressure goes away. Presumably, this is due to muffling by minimizing the gap between the plastic front part and the metal backing of the housing. There have been postings about this issue implicating a variety of pulleys, tensioners and the belt. However, it appears unlikely that any of these components are faulty, as they are new and have been re-examined with the second belt change. The timing belt is a toothed belt, so it should not squeal. One commenter contended that the left camshaft sprocket was causing this. Indeed, the noise is loudest in that area. Although the sprocket could be replaced, there would be no harm or long term damage if left alone. As you would imagine, I am concerned, as this is an interference engine. Is this something I need to worry about or should I continue to throw money at it? Any expert opinions are greatly appreciated. - Thanks