Diesel Mechanic advices not to ignore Strange Diesel Noises!

A common characteristic of diesel engines is noise!  If you aren’t familiar with diesel engines, you may be wondering just what is acceptable and what is not.  Injector “nailing” and ignition “knock” causes most of the usual knocking and pinging in a diesel engine.  Not every noise that comes from under the hood is bad—some sounds are usual.  A diesel auto mechanic can tell you what is usual and what is not.  

Diesel engine issues generally happen because people ignore the unusual noises which can indicate issues.  Some knocking noises are of no concern at all, while other noises are signs of trouble.  Don’t take any strange noises lightly but schedule a diesel service as soon as possible.   

Why is a diesel engine so noisy?  Fuel is injected into compressed air inside the cylinder in which there are a lot of little parts, such as small valves, and oil pipes that create the noise. Also, because diesel fuel is less filtered than petrol, it has more particles in it that make louder noises when it’s ignited.  

Problem noises:

1. Rattling. You may hear rattling when you accelerate, caused by the air and fuel mixture in the cylinder that gets ignited prematurely by the compression inside the engine. This is called pre-ignition and it can damage the pistons, valves, and connecting rods inside the engine.  
2. Ticking. Typically, a ticking noise is caused by reciprocating parts like pistons, valves, rods, and pushrods. It is also an indicator of problems such as low oil level, ill-adjusted valves, rod knock, or noisy lifter.
3. Knocking.  Knocking noise is produced by the injectors. Though, deposits build up in the tips of fuel injectors, normally when there's fuel left in the injector tips after the engine is shut.
4. Timing Chain Meshing. The timing chain connects the camshaft and crankshaft which will produce a meshing sound if it is too loose. 

The key to Diesel Engine Performance!

The key to getting the best performance and fuel mileage from your diesel engine is clean fuel injectors that are functioning correctly.

Are you looking for quality diesel repair?  Call our ASE Certified technicians at Auto & Fleet Mechanic for more advice from a diesel mechanic and to make an appointment. Our auto repair shop proudly serves residents in Modesto, CA, and the surrounding area.

When Should You Service Your Car A/C?

Because today’s cars are more computerized than ever, the car A/C system is more complex than ever.  At least once a year, schedule a car AC service with a certified auto repair mechanic who can handle refrigerants.  This will ensure you are riding in comfort at all times, plus see improved gas mileage with less toxic emissions.

So wondering when should you service your car A/C?  Any time is a good time!  Especially after a hot summer and before heading into fall, it’s time to give your car AC some much-needed attention. Here are several maintenance tips that will keep your car air conditioner in good working condition:

1. Run the air conditioner once a week for about 10 minutes. Turn the A/C to its maximum fan speed and coolest setting to keep the compressor working correctly.
2. Run defrost mode for about 5 to 10 minutes. This prevents mildew and cleans out excessive moisture (which can cause obnoxious odors in your car).
3. Use your car A/C in winter. In addition to cooling your vehicle, one of the A/C’s primary functions is to remove humidity from the passenger cabin, such as a fogged-up windshield.
4. Refresh Cooling System.  Every 2 years replace the compressed gas and lubricant in the A/C system.
5. Schedule a car A/C service.  Early detection of leaks or damage can save you time and money, keeping you and everyone in your vehicle cool and worry-free.

During the hot temperatures of summer, your car air conditioner has received a lot of use.  Regular maintenance will keep it performing at its best as you head into fall and winter.  You will see the benefits of improved gas mileage, a cleaner running vehicle, and a more relaxed ride.

Are you wondering when should you service your car A/c?  Call our ASE Certified technicians at Auto & Fleet Mechanic for more information about our auto repair shop and to make an appointment. Our auto repair shop proudly serves residents in Modesto, CA, and the surrounding area.

Why is my brake light not working?

With the long days of summer here, many car drivers may not think about their headlights and brake lights.  But, it’s important to keep an eye on them as they can burn out or stop working without noticing.  All of a sudden, you may start to wonder, “Why is my brake light not working?”  It’s still important that you have working lights (headlights, brake lights, and turn signals) so that other drivers know you are there or in which direction you plan to turn. 

So what causes lights to not work or appear extra dim?  There could be several reasons, including:

• Burned out bulbs:  If only one brake light is not working, the issue is normally a burned-out bulb.  Has it replaced as soon as possible?  If it still doesn’t work, ask your auto mechanic to inspect the wiring or fuses.
• High beam doesn’t work:  If the headlight was replaced or it isn’t burned out, there could be faulty wiring in the switch.
• Electrical System:  There may be an issue in the electrical system if the lights dim only when the engine is idling and the brightness changes with the RPM.  An auto electrical repair service can pinpoint the issue, such as a bad alternator or a loose belt.  Though, if the alternator inspects out okay, the accessories may be drawing too much power and a more powerful alternator may be needed.
• Lights are too dim:   Bulbs can lose their brightness as they age, so you may want to invest in a new set of bulbs.  Dirty lenses block the light and can be cleaned and reconditioned.  Foggy lenses are an indication that water is getting into the headlight assembly and it may want to be replaced.

The electrical system is comprised of some components including the battery, battery cables, alternator, starter, and computer system. Problems with any of these components can cause issues with the vehicle’s operation and will normally require the use of specialized diagnostic equipment to identify the cause.   

In older vehicles, the average person could replace burned out bulbs themselves.  But lights are now much harder to access in today’s vehicles.  Your auto mechanic has the right tools and diagnostic equipment to check the bulbs, fuses, switches, and relays, and then either repair or replace as needed.  

Are you wondering why is my brake light not working?  Consult our ASE Certified technicians at Auto & Fleet Mechanic for more information about auto electric repair problems and to make an appointment. Our auto repair shop proudly serves residents in Modesto, CA, and the surrounding area.

What are the Symptoms of a Failing Alternator?

Many drivers are not aware that the alternator is a key component in your car's electrical system.  What does it do, you ask?  Simply stated, it turns the energy from the crankshaft into useful electricity to power the vehicle's electrical systems and to help the battery recharge. When the alternator starts to fail, it can create a domino effect of electrical issues that can eventually cause a breakdown.  The issue is that it is often difficult to determine whether a failing alternator, a weak battery, or a bad car starter is the culprit.

So what are the symptoms of a failing alternator?  Here are 6 signs that are easy to notice:

1. The indicator light illuminates on the dashboard titled "ALT" or "GEN.”
2. Dim headlights generally mean the alternator is struggling to perform.
3. Other electrical systems that are powered by the alternator may start to act up, including power windows, power locks, dashboard lights, air conditioning, car radio, GPS, and etc. 
4. Sometimes Alternator failure can cause some of the bearings to fail in the engine, creating rare rattles and noises. 
5. When the alternator is failing, there might not be enough power in the spark plugs to keep the engine alive, which can cause it to stall for no reason while running.
6. The battery sometimes will be drained of its charge because the alternator is not capable of recharging it.

If your vehicle is getting hard to start, for driving safety, performance, and peace of mind, have the car starter, the battery, and the alternator checked as soon as possible.  Don’t delay until you are suddenly left stranded somewhere before taking care of starting issues.

  

Are you wondering what are the symptoms of a failing alternator?  Consult our ASE Certified technicians at Auto & Fleet Mechanic for more information about car starters, alternators, and batteries and to make an appointment. Our auto repair shop proudly serves residents in Modesto, CA, and the surrounding area.

What Are the Signs That Your Car Needs a Tune Up?

The use of computers has been one of the most useful advances in the automotive industry.  Because of these technological advances, your auto mechanic can run an engine diagnostics that scans the operating systems in your vehicle with a specialized computer.  This is not only compulsory when the check engine light comes on, but also as a yearly inspection that can determine if your car is in need of a tune up.  

This diagnostic computer can find issues associated with the transmission, oil tank, gas tank, exhaust system, and other components. It can also indicate ignition timing problems, level of buildup in the combustion engine, fuel injector performance, whether the ignition coils are firing, engine rpm levels, air and coolant temperature, crankshaft and camshaft position, and throttle opening. In other words, it will let you know when its time for a tune up!  

So just what are the signs that your car needs a tune up? If your car isn’t driving as well as normal, it is possibly time for a tune up. Look for these signs:

• Check engine light comes on. 
• Engine stalls when you try to accelerate.
• Decreased fuel economy.
• Brake issues.
• Shifting issues.
• Excessive vibration or shaking felt in the steering wheel.

An engine diagnostics can analyze the overall performance of your vehicle and pinpoint any possible issues as well as determine whether any adjustments may be needed.  Preventative maintenance and repairs don’t have to be based on guesswork anymore.  Instead of spending your hard-earned money on fixing things by “trial and error,” issues can be identified long before they become major problems.  

Some auto mechanics may recommend taking your car in for an engine diagnostics at least once a year to uncover minor issues that can’t be seen.  It’s also useful when you’re inspecting out a used car so you know whether or not it’s a good deal.

Are you wondering what are the signs that your car needs a tune up?  Consult our ASE Certified technicians at Auto & Fleet Mechanic for more information about engine diagnostics and to make an appointment. Our auto repair shop proudly serves residents in Modesto, CA, and the surrounding area.

Wondering how Often Should You Change Your Oil?

There is still a lot of debate going on in the automotive industry today on how often should you change your oil.  If you’re confused, the best place to look is your owner’s manual.  This little book will give you guidelines on how often you should change the oil as well as what type of oil to use. Depending on the age and make of your vehicle is often a determining factor.

There may be two different schedules listed in your manual — normal and severe.  Essentially, very few drivers may fall under the normal category.  Severe driving conditions include stop-and-go driving, idling in traffic, towing a trailer, driving in extreme warmth or cold, or frequent short-distance driving in which the engine cannot reach full operating temperature.  In this case, most vehicle manufacturers recommend changing the oil more frequently than usual.  

With that said above, it may still be confusing as to how often should you change your oil. Most vehicles these days can now go to every 7,500 to 10,000 miles (instead of the old standard of every 3,000 miles) before needing an oil change, or every 6 months, whichever comes first.   

It’s important that drivers understand that changing the oil is the best preventative maintenance for extending the life of your engine.  With repeated exposure to cold starts, short trips, and engine warmth, oil gets dirty, becomes thicker, and loses its ability to prevent sludge and deposits from forming.  Clean fresh oil can efficiently lubricate and clean the moving parts of the engine as well as cooling as it circulates.

The cost of an oil change service is minimal compared to the cost of engine repair for engine damage caused by neglecting regular oil changes.  Many auto shops offer oil change coupons as a service to their customers.  The advantage of more frequent oil changes is that it gives your auto mechanic a chance to check your car for other problems or needed routine maintenance.

Are you wondering where to get oil change coupons?  Consult our ASE Certified technicians at Auto & Fleet Mechanic for more information about how often should you change your oil and make an appointment. Our auto repair shop proudly serves residents in Modesto, CA, and the surrounding area.

Why is my car air conditioner not blowing cold air?

You don’t have to wait for the warmth of summer to be here in full force before looking for auto AC service. Even though we have looked forward to warmer temperatures, most people still like to stay cool and relaxed in their car even if it’s just for a short commute to work or to pick up groceries.  It’s especially important if you’re planning a summer road trip.  

Don’t find yourself out on the road wondering, “Why is my car air conditioner not blowing cold air?”  There are various reasons that could cause this issue:

• The coolant has lost its efficiency.  Fresh coolant added to the radiator may be all that is needed for the AC to work again.   
• The AC’s compressor is not creating a high enough pressure in the system for the refrigerant to cool correctly.
• A block in the system is allowing the high-pressure refrigerant to slowly decompress through the block. 
• Constantly exposed to stress from the health of the engine, road debris, dirt, vibrations, quick stops, and even run-ins with curbs, small cracks can be created in the AC unit through which the refrigerant is escaping.  
• The cooling fans could be burned out, mounted incorrectly, a chipped blade, or a simple blown fuse or burnt-out relay.
• An issue in the electrical system is giving out faulty signals caused by a broken wire or bad module, bad sensors tripping off your system, or causing the system to shut off inadvertently.  

With the use of computerized parts in today’s vehicles, the AC system is more complex than ever.  At least once a year, schedule an auto AC service with an auto mechanic who is certified to handle refrigerants. You will reap the benefits of not only a more relaxed drive in summer’s warm temperatures, but increased gas mileage, and a more environmentally-friendly vehicle.

So if you’re wondering why is my car air conditioner not blowing cold air, Call our ASE Certified technicians at Auto & Fleet Mechanic for more information about auto AC service and to make an appointment. Our auto repair shop proudly serves residents in Modesto, CA, and the surrounding area.

What Does a Full Service Include on a Diesel Engine?

After several considerations, you may have decided to purchase a diesel car or truck.  But your question now is what does a full service include on a diesel engine?  How should you take care of it?  It is important that you find a trustworthy diesel auto mechanic that is qualified to answer your questions and perform the needed maintenance services.

In several respects, a diesel engine is not as complex as a gasoline-powered engine, and will provide you with greater reliability.  Diesel engines use compression in the combustion chamber to ignite the fuel instead of a spark like in a gas engine.  That means that diesel engines don’t require ignition tune-ups, plus they tend to run longer without major repairs than gas engines.  

That said, today’s newer diesel engines are more complex than in years past.  Due to higher emissions standards, increased horsepower, torque, and their advanced technology, the maintenance required for diesels has also increased.  Usually, a full service on your diesel car or truck includes:

• Changing the oil and filter—use the correct grade for your diesel engine
• Changing the air filter—Catches sand and other debris
• Changing the fuel filter—keeps the fuel clean so there is no water or contaminants in it
• Bleeding the fuel system—flushes out contaminated fuel
• Draining the water separators—some drain automatically
• Refill injection system—reduces nitrogen oxide emissions.  

The maintenance schedule for your diesel vehicle can be found in your owner’s manual.  Also, be sure to ask an ASE certified diesel auto mechanic to help you understand the schedule for your specific vehicle and then help you prioritize and budget for these services.

Are you wondering what does a full service include on a diesel car or truck?  Call our ASE Certified diesel auto mechanics at Auto & Fleet Mechanic for more information about diesel service and repairs and to make an appointment. Our auto repair shop proudly serves residents in Modesto, CA, and the surrounding area.

What Does a Pre-Purchase Inspection Include?

Are you looking at a used car to buy?  It’s hard to know whether a car is a good deal or a lemon by just looking at the exterior.  A pre-purchase inspection by a dependent auto shop will help make sure you are getting a fair evaluation.  A multi-point inspection will uncover any hidden damage, defects, maintenance history, and driving safety.

Before you get a pre-purchase inspection, you must first obtain the Seller’s permission.  A written report will be provided to you along with insights on the car’s condition.  A typical pre-purchase inspection may include:

• Structural integrity, 
• Safety features,
• Electrical & electronic systems,
• Powertrain, 
• Suspension, 
• Fuel system, 
• Exhaust/Emissions, 
• Steering,
• Heating/air conditioning system
• Security system,
• Onboard computer systems,
• Interior,
• Wheels and rims,
• VIN alteration,
• Damage from accidents, flood or rough use,
• Odometer fraud,
• License plates,
• Salvage title, and more.

Whether it’s your first or your 100th, the purchase of a vehicle is a significant investment.  Ask for a car history report in addition to scheduling a multi-point inspection.  You don’t want to waste your money or be disappointed by your purchase.  Make sure you receive a comprehensive evaluation so you can make the best-informed decision possible.

Do you want to schedule a pre-purchase inspection?  Call our ASE Certified technicians at Auto & Fleet Mechanic for more information about a multi-point inspection and to make an appointment. Our auto repair shop proudly serves residents in Modesto, CA, and the surrounding area.

When Should the Timing Belt Be Replaced?

An often-overlooked part of your vehicle is the timing belt.  Also called the serpentine belt, it plays an important role in the operation of your car.  If it fails, so does your engine, making your vehicle totally inoperable.  You don’t want to be driving along at 75 miles per hour and all of a sudden have the timing belt break!  

Why is the timing belt so important, you ask?  The timing belt controls the rotation of the crankshaft and camshaft the opening and closing of the engine’s valves to allow air and gas in and out, which causes the fuel in the combustion chamber.  If the timing belt breaks, all these other components will not open and close at the right time to do their job.

So when should the timing belt be replaced?  There aren’t any obvious signs that the timing belt is about ready to give out.  It simply breaks! Generally, while you’re driving.  This is why highly rated auto mechanics recommend replacing it as a preventative measure at about every 60,000 to 100,000 miles.  Always Inspect your owner’s manual for the manufacturer’s recommendation for your specific vehicle.

It’s not a matter of “if” the belt breaks, but “when” it will break. Replacement of the belt is usually determined by the mileage of the vehicle, the age, and when, or if, the belt was replaced before.  

Many auto shops do more than just replace the timing belt.  Because there are other components close to the belt, such as the water pump and vehicle hoses, they will be checked out at the same time.  Many auto mechanics recommend replacing the water pump and any cracked vehicle hoses at the same time as the timing belt is replaced.  This will save you a significant amount of time and money spent at a later time if it is compulsory to just replace the water pump.

Have more questions about when should the timing belt be replaced?  Call our ASE Certified technicians at Auto & Fleet Mechanic for more information about preventative vehicle maintenance, such as vehicle hoses and the water pump, and to make an appointment. Our auto repair shop proudly serves residents in Modesto, CA, and the surrounding area.

How Often Should You Have Your Car Serviced?

To have a safe and trustworthy vehicle, you may be wondering just how often should you have your car serviced.  As a general rule of thumb, we recommend you have your car serviced every 12 months or 12000 miles, whichever comes first. Heavy car users, who drive many miles a year, should aim to have at least an interim service every 6 months or 6000 miles.

How do you know when to have your car serviced?  Many of today’s cars have an in-vehicle reminder system that delivers an alert on the instrument panel when it is time for certain services, such as oil changes, fluid level inspects, brake checkup, and other maintenance problems.  Although you can usually trust this reminder system, it is still wise to double-check the schedule of maintenance services listed in your owner’s manual or ask your car repair technician for the right service intervals for your car.

There are some factors to take into consideration as to how often should you have your car serviced:

• The age of your car
• Your car’s make and model
• How you use your car
• How many miles you drive

Today’s cars are too complex for most vehicle owners to take care of their own maintenance.  There are two ways in which you can plan ahead for car repair and maintenance.  First, try to fit the expense of car service in your budget.  Secondly, find an auto shop and mechanic you can trust before you want them.  It’s best to trust the skills and experience of a certified mechanic. 

Do you want to know more about how often should you have your car serviced?  Call our ASE Certified technicians at Auto & Fleet Mechanic for more information about car repair services and to make an appointment. Our auto repair shop proudly serves residents in Modesto, CA, and the surrounding area.

Wondering How Often Should Brakes Be Replaced?

Inappropriately, there is no clear-cut timeline that tells you how often should brakes be replaced.  You may only drive 8,000 miles per year, but if it is consistent stop-and-go driving in a large city, your brakes will wear more quickly than if you drive 15,000 miles through the flatlands of South Dakota. 

There are some factors to take into consideration that determine how often you will want a brake replacement, such as:

• How you drive,
• The weight of your vehicle, which includes passengers and cargo
• The quality of your brake materials, and
• The purpose of your vehicle.

Brake experts will tell you that the best way to determine if you want a brake replacement is to rely on how your brakes are performing, plus what you hear, see and feel!

If you hear a squealing sound when you step on the brake pedal, it could be the built-in wear sensors scraping against the brake disc.  If your car does not have a built-in sensor, listen for squeaking, squealing, or metal-on-metal grinding.  Cleaning the brakes can get rid of several minor noises, but persistent, loud noises generally mean parts are worn out.

Have you noticed the little brake warning light that flashes when you start up your car?  If it illuminates while you’re driving, it is an indicator that your brake system may be low on fluid due to a leak or an issue with the master cylinder.  Also, many vehicles have an electronic wear indicator with a dashboard warning light if the brake pads reach a certain minimum thickness.

Tip to Remember:  Because many drivers have their tires rotated periodically (mechanics recommend a tire rotation at least every 6 months), have your brakes checked visually at the same time.  This is the best way to determine the condition of the brake pads, rotors, calipers and drum.

Are you wondering how often should brakes be replaced?  Call our ASE Certified technicians at Auto & Fleet Mechanic for more information about brake replacement and to make an appointment. Our auto repair shop proudly serves residents in Modesto, CA, and the surrounding area.