Rockville Auto Repair

When you are pointing your vehicle straight down the street, it should go straight.  That’s pretty straightforward, right? Sometimes, though, you may notice you have to keep adjusting the steering wheel to keep going straight.  While that could be caused by many different issues, one possibility is that you have a failing or bent control arm. Another sign is that when you brake, your vehicle pulls to one side or the other.  Sometimes your suspension may sound noisy, especially when you’re traveling on rough surfaces.  A damaged control arm may also make it almost impossible for you to get a good wheel alignment.  The control arms are part of your suspension, and some vehicles have upper control arms and lower control arms.  Not all have the same number of control arms, but one thing is important: If you have worn bushings on your control arms or a worn-out ball joint, the control arm on the other side should also be replaced.  The rubber b ... read more

If you own a newer vehicle, your vehicle’s manufacturer may require that it use synthetic oil instead of conventional oil.  Synthetic oils are more stable, don’t break down as easily, and provide better engine protection than conventional oil. All those things can prolong the life of your engine and help it run better. Imagine the damage that could happen to your engine as it operates at high speeds and very hot temperatures.  Oil reduces the friction between the metal parts.  That’s why it’s important that it maintains its lubricating properties for a long time, which synthetic oil does better than conventional oil.   Clean oil is better than dirty oil because it has fewer impurities.  Synthetic oil is purer because of how it’s formulated and manufactured.  Plus, as the outside temperatures change, the ability of oil to operate in those conditions is important.  
For example, the colder it gets, it’s important f
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If you have a front-wheel-drive vehicle, it has components called CV joints which enable you to turn your wheels smoothly. The CV stands for “constant velocity.” In essence, it’s a set of gears that connect a shaft that allows power from the transmission to be sent to the wheels.  When you turn the wheels, no matter what angle, the input velocity rotation will be equal to the output. Thus, the name, CV (constant velocity) joint. Other vehicles with 4-wheel drive and all-wheel drive also use CV joints.   If one of your CV joints isn’t working right, you may find your vehicle difficult to handle.  If one breaks, your vehicle may stop moving.  So, it’s important that CV joints be in top working condition.  The joints need a lot of lubrication, so they are surrounded by grease.  There’s a rubber enclosure around them called the boot which holds the grease in and protects CV joints from the elements. 
 
The bi

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Think of how many times you put your foot on your vehicle’s brake pedal every day.  And think of how much you rely on your brakes to slow down and stop your momentum.  When it comes to safety systems, your brakes are at the top of the list, and that’s why it’s so important to keep them in top condition. Brakes are something you make sure you keep maintained before they start showing signs of problems. Some of those signs are a grinding sound when you step on the brake pedal, your vehicle pulling to one side when you brake, you don’t feel your brakes stopping you as quickly as they used to, or you notice the brake light is illuminated on your instrument panel.  We ask a lot of our brakes.  They have to work no matter how hot or cold it is outside.  That means whether it’s sunny, snowing, raining, or icy; you’re traveling at highway speeds or school-zone speeds; or when suddenly you find yourself trying to avoid hitting another ... read more

The internal combustion engine in your vehicle counts on two things that mix together to be burned in the engine for power: fuel and air.  Both are important, of course.  If you run out of fuel, your engine won’t run at all.  Since there’s plenty of air around, you won’t run out of air, but you could feel your vehicle’s performance suffer if the engine air filter starts to get clogged.  It's important that the air that enters your engine be free of dirt, dust, and debris to prevent damage to internal components.  That’s where the engine air filter comes in.  It prevents those particles from entering the engine, an important job that most people just take for granted. After a while, your air filter will get dirty, which results in less air reaching the engine.  Modern fuel injected engines can adjust the amount of gas to mix with the air that is getting in, so your fuel economy won’t change significantly.  What ... read more

Talk about exquisite choreography; it happens under the hood of your vehicle every time you take a drive.  Your engine’s many complex parts must work exactly together.  One key is a part called a timing belt, which enables the synchronizing of two of your engine’s components, the camshaft, and the crankshaft.   The timing belt coordinates the valves in your engine to open and close at the appropriate time to get exhaust out of the engine’s cylinders. Timing belts may also power the water pump and the oil pump.  The belt is made of rubber.  Some engines use a timing chain (made of metal).  Your vehicle’s manufacturer recommends an interval after which you should have your timing belt or chain replaced, and that service should be part of your vehicle’s regular maintenance.  It’s always better to replace it before it breaks rather than after.  After all, if your timing belt breaks while you’re driving down t ... read more

A clean connection is a wonderful thing.  Think of a good cell phone signal or an airline connection with ample time and short distance to the next gate. Good connections are also important for your vehicle’s battery, and one secret to that is to make sure it’s periodically cleaned. If it’s been a while since you have had any service to your battery, bring it in so we can inspect it for any corrosion that might have formed.  Corrosion on the battery terminals will affect the connection between the battery and your vehicle’s electrical system. The amount of corrosion you can expect can be influenced by such things as the kind of climate you live in (dry or humid, warm or cold), if there’s lots of salt on the roads and how old your battery is.   We have tools and chemicals to safely remove the corrosion for an optimal electrical connection. In order to reduce the amount of corrosion re-forming on the battery, we’ll apply a special protec ... read more

Ever wonder how your vehicle’s engine is able to take the 12-volts from its battery and ramp that up to as high as the tens of thousands of volts it takes to fire its spark plugs? The secret is something called an ignition coil.  Most newer vehicles have an ignition coil at each cylinder, but older ones have a coil that serves all of the spark plugs.  There are telltale signs that you have an ignition coil problem.  As you might expect, one symptom is it’s hard to start your engine or it won’t start at all.  If your engine is misfiring or not running smoothly or you see the Check Engine light come on, those all could point to an ignition coil failure. Several things can contribute to ignition coil trouble in addition to normal wear and tear. Moisture and dirt may have gotten inside the coil, plus the heat and vibration of your engine over time can contribute to them going bad.  Bad spark plugs or plug wires can also be a cause.   While ig ... read more

Ever wonder how your vehicle is able to move over bumps, potholes and other irregularities in the road and you hardly feel a vibration in the cabin? It’s your shocks and struts doing the hard work along with the rest of your suspension and tires.  They keep the ride smooth and are important for your vehicle’s safe operation.  So, how do you know when your shocks and struts are wearing out? One way is to look at the surface of your tire (where the rubber meets the road—where the tread is).  You might see some little indentations in certain spots, known as tire cupping.  If your vehicle takes longer to stop than it used to, takes a dive when you hit the brake pedal or bottoms out (scrapes) on a big bump in the road, that’s another sign, as are loud, odd noises. You may also notice your vehicle sways more than it used to. Every once in a while, look around at your shocks to see what shape things are in.  If you see the rubber cover cracked ... read more

For most drivers, at some point you’re going to have a flat tire. Depending on how it was damaged, it may have to be replaced.  But sometimes, a repair will do the trick, as long as the puncture isn’t on the sidewall and the hole is smaller than ¼ inch/6.35mm in diameter. Here are the three common ways your tire can be fixed. One way is to put a plug in the hole.  Since most tires are damaged by running over sharp objects such as screws and nails, the small hole from which the air is escaping is on the part of the tire that touches the road. If it’s in the sidewall, it most likely can’t be fixed.   In the plug method, a technician inserets a rubber plug.  It is covered with some sticky, gluey stuff, and is pushed into the hole from the outside. That plugs the hole and stays in place, thanks to the glue. Friction from driving heats it up and seals the deal.   Another method is to patch the hole.  For this, your tire has to fir ... read more