All of it. The 10 percent figure you occasionally see is nonsense that a lot of people believe just because they've seen it so much.
Quick Answer. Some things that cause a vehicle's front end to make a clunking noise are worn ball joints, a damaged tie rod, broken or loose sway-bar links, hard or damaged shocks, and faulty shock mounts. An automotive professional can inspect the vehicle's front end to locate the source of the clunk. Continue Reading.
A KNOCKING SOUND IN THE ENGINE IS MOST LIKELY CAUSED BY ONE OF THE FOLLOWING. 1  1. PISTON SLAP: Makes a sharp metallic noise. 2  2. VALVE NOISE: Makes clicking or rattle noise. 3  4. REAR MAIN BEARING KNOCK: Makes dull knocking or thud noise.