So, I bought a 2000 Camry LE 4 Cylinder. I LOVE IT... But... I didn't take a close enough look when buying... There's a puff of smoke when the car starts. The engine also sounds very rough, especially when it starts cold- almost a chugging. With a stethascope, the sound seems to eminate from the water pump. I took it back to the dealer ship. They're stating it needs to now go to Toyota and the folks at the Toyota dealer ship thinks it may be a know issue. Well, if it is, it's not well known because I can't find it. Any advice on what's going on would be well appreciated. Thank you!