AP courses can also help you get accepted into college. It's less about taking the easy classes and earning an A than it is about showing colleges that you're willing to take a challenging class, even if it lowers your grade point average.
If you hear a clunk when the suspension works over bumps, the probable cause is excessive clearance in a joint due to wear. It might be as simple as a loose strut gland nut, or something more subtle such as a shrunken, dried-out rubber bushing. Share.
If the noise you hear is a fast tap or clatter near the top of the engine, it could be valve noise which would require you to have some cylinder head work done. Some noise can come from a worn camshaft. It's also a tapping noise. If the noise is a steady metallic rap, it may indicate a rod/rod bearing. A quick steady tap may indicate lifters or cam lobe, while a clatter may be loose/worn rocker arms. A low rumble or knocking noise could be caused by a bad rod bearing on the crankshaft. Here are a couple of sites that will tell you a bit more: 1  http://www.remanufactured.com/Engine_Noi...  http://www.aa1car.com/library/engine_noi....