San Jose Auto Repair

You probably see a lot of different answers to this one. A quick lube sticker says one thing, the dashboard says another, and a friend swears they go twice as long with no issues. Meanwhile, you are just trying to avoid an expensive engine repair. The truth is, the right oil change interval depends on how and where you drive, and how honest you are about those habits. Why Oil Change Intervals Aren’t One-Size-Fits-All Every trip slowly wears down the additives in the oil. Heat, short trips, stop and go traffic, and towing all speeds that process up. A car that spends most of its time cruising gently on the highway can usually go longer between changes than one that lives in city traffic and cold starts. Service schedules in the manual reflect this. There is usually a “normal” schedule and a “severe” one. Most people like to believe th ... read more

A slow morning start can mean two different things: the engine cranks slowly, or it cranks at normal speed but takes longer than usual to fire. Each points to a different set of causes. Sorting which symptom you have is the first step to a clean fix. What “Slow Start” Really Means If the starter turns the engine slowly, think battery, cables, or the starter itself. If the engine spins at normal speed yet needs extra seconds before it catches, look to fuel pressure, air measurement, or sensors that control cold enrichment. A start that fires, stumbles, and dies once may hint at a dirty throttle body or an idle control problem. Cold Batteries and Thick Oil Batteries lose cranking power as temperatures drop. A three to five year old battery can sound fine at noon and struggle at dawn. Corroded terminals or loose grounds add resistance that steals voltage during cranking. Oil viscosity matters too. Using the manufacturer’s specified ... read more

A healthy serpentine belt keeps your alternator charging, your water pump circulating coolant, and your A/C blowing cold. When the belt slips or starts to crack, those systems suffer together. The tricky part is that many belts look fine until they do not. If your engine has begun to squeak at startup, or you notice a dim battery light in traffic with the A/C on, it is time to look closely at the belt and the parts that guide it. What the Serpentine Belt Actually Does Modern engines use one long multi-rib belt to drive several accessories at once. As the crankshaft turns, the belt spins the alternator, power steering pump, water pump on many models, and the A/C compressor. That single loop is efficient, but it also means one worn belt can affect charging, cooling, and steering on the same day. The belt relies on correct tension and clean pulley grooves to grip. Any slippage turns into heat and glaze on the ribbed side, which shortens life. Why Belts Fail Ev ... read more

If you sneeze, feel irritation, or just discomfort every time you get behind the wheel, your car’s cabin air filter could be part of the problem. This important filter is responsible for cleaning the air that comes through your heating and air conditioning system. When it’s dirty or clogged, it can circulate dust, pollen, and other irritants right back into your cabin. For drivers in San Jose and Milpitas, where seasonal allergies are already a challenge, a neglected cabin air filter can make driving much less comfortable. What a Cabin Air Filter Actually Does The cabin air filter is often hidden behind the glove box or under the dashboard. Its job is to trap dust, pollen, mold spores, and even exhaust fumes before they reach the interior. Think of it as the last line of defense between outside air and your lungs. A clean filter helps your HVAC system deliver fresh air inside the cabin. Over time, however, the filter fills up with debris, reducing airflo ... read more

Spark plugs play a big role in how efficiently your engine runs. Each one creates the spark that ignites the air-fuel mixture inside your engine’s cylinders. When they’re in good condition, combustion is clean and efficient, resulting in improved fuel economy and smoother performance. However, when spark plugs start to wear out, fuel is burned less efficiently, resulting in wasted gas and lower miles per gallon. Signs of Worn or Failing Spark Plugs Spark plugs don’t usually fail all at once—they wear down gradually. Some of the most common symptoms of worn plugs include: Difficulty starting your vehicle Rough idling or hesitation when accelerating Misfires or reduced engine power Lower fuel efficiency than usual These symptoms may seem minor at first, but they accumulate to higher fuel costs and increased strain on your engine over time. How Spark Plugs Affect Combustion When spark plugs wear, the gap between the electro ... read more