South San Francisco Auto Repair

A rattle over small bumps can drive you nuts because it makes the car feel cheaper than it is. The annoying part is that it often happens at low speeds, like parking lots, neighborhood streets, and rough intersections. It might even disappear on the highway, which makes it harder to explain at the shop. Most of the time, a rattle means something has a little extra movement that it should not have. It can be a suspension part, an exhaust shield, or even something loose in the cabin. The sooner you narrow down where it’s coming from, the easier it is to fix before it turns into a bigger issue. Why The Noise Shows Up On Small Bumps Small bumps create quick, sharp suspension movement. That fast up-down motion is perfect for making loose parts tap, especially if the suspension is already a little worn. Bigger bumps can sometimes mask the sound because everything moves together, while small bumps make just one corner chatter. Temperature can change the noise too. R ... read more

A timing belt problem rarely starts with obvious signs. It usually starts with a quiet unknown in the background, especially if you bought the car used, or you cannot remember the last time it was replaced. Then you hear one story about a belt breaking without warning, and suddenly you are wondering if you are driving on borrowed time. The good news is you do not have to wait for a scare. If you know how timing belt intervals work, what factors shorten them, and what to replace while you are in there, you can handle it on your schedule instead of getting forced into it. Timing Belt Vs Serpentine Belt The serpentine belt is the one you can usually see. It runs accessories like the alternator and AC. If it fails, you may lose charging or cooling, but it is generally an external repair. A timing belt is different. It lives behind covers and keeps the crankshaft and camshafts synced. That timing is what lets valves open and close at the right moment. If the belt slips ... read more