AUTONET TV

Direct Fuel Injection Update from McPherson Automotive

For those of you in Du Quoin, IL who pay attention to these things, you may have been hearing about the new direct injection engines and want to learn more about them. Some deliver the power of a V8 with the economy of a V6.

For example, in one family of engines the conventional V6 makes about 250 horsepower. The direct injection version of the same engine makes over 300 horsepower and gets essentially the same fuel economy. The turbocharged version makes over 350 horsepower.

So what are the differences from a conventional engine?

The core difference is in the fuel injection system. The system most vehicles use now is called a port injection system. The fuel injector squirts fuel into a port just outside the cylinder where it's then drawn into the engine with the air.

With a direct injection system, the injector squirts the fuel directly into the cylinder. The gain in power and economy come because fuel injected directly into the cylinder during the combustion cycle is burned much more efficiently.

First, the fuel is squirted in at hundreds of times more pressure, so it's atomized much better and burns cleaner and stronger. The other big advance is in electronics. Faster engine management computers can control the additional precision required to manage direct fuel injection.

Fuel injectors are precision instruments. They have to deliver a precise amount of fuel at exactly the right time. The design of the engine also dictates a particular spray pattern for the fuel. If a fuel injector is dirty or gummed up, it can't do its job as well. That means less power and worse fuel economy for your vehicle and can lead to damaged fuel injectors.

Replacing fuel injectors at McPherson Automotive isn't cheap. Direct injection injectors are even more expensive because of the extremely high-pressure they use. Same thing for diesel fuel injectors; we're talking mortgage payment-range to replace a set of diesel injectors.

A professional fuel system cleaning from McPherson Automotive gets out the gum and varnish in the whole system, including the fuel injectors. Keep those injectors clean and they'll last a long, long time.

McPherson Automotive
1 E Park St
Du Quoin, IL 62832
(618) 542-9203
http://www.mcphersonautomotive.net

Water Pump

Your cooling system is very important. It circulates coolant through the radiator and your engine to protect your vehicle from overheating. There are five main components to the cooling system:

• the radiator
• the radiator cap
• the hoses
• the thermostat
• the water pump

The water pump's like the heart of your cooling system, circulating the fluid throughout your vehicle. It's a small pump that's driven by the engine; usually by belt, but sometimes by a chain or gear.

The water pump only operates when the engine's running. Water pump failure is pretty routine. We see it often at McPherson Automotive. Some start failing at around 40,000 miles/64,000 km, but most fail by 100,000 miles/160,000 km. Consult your owner's manual or friendly and knowledgeable service advisor at McPherson Automotive to see what's recommended.

Since a water pump either works or it doesn't, you need to change it when it fails. Water pumps fail in one of two ways: the bearings fail or they begin to leak. It's possible to have a leak from a cracked water pump, but it usually leaks at the gasket where it attaches to the engine.

So how can Du Quoin drivers tell when the water pump is failing? If you can hear a low-pitched grinding sound coming from the water pump, it's got a problem. If you can see coolant in that area, you've got a leak.

Some water pumps are driven off the timing belt. They might be under a plastic cover so you can't see the water pump. Look for coolant on the driveway. If you see some, have McPherson Automotive check it out.

Most timing belts need to be changed at 60,000 miles/97,000 km – some longer. It's a good idea to change your water pump at the same time if it's one of those that's driven off the timing belt. To start with, 90% of the work's already done with the timing belt change. And if you don't and develop a leak later, you'll have to change the belt again along with the water pump because the belt will have been contaminated by the leaking coolant.

McPherson Automotive can replace a failed water pump with a brand spankin' new one or with a rebuilt pump. Rebuilt will save you some money, but ask your service advisor at McPherson Automotive what he thinks. Don't feel too bad if your water pump gives out. They will all wear out eventually. We can get you back on the road and on with your life.

McPherson Automotive
1 E Park St
Du Quoin, IL 62832
(618) 542-9203
http://www.mcphersonautomotive.net

Keep Your Tires Well Rounded in Du Quoin: Tire Rotation and Wheel Balancing at McPherson Automotive

Taking care of our tires is part of vehicle care for Du Quoin drivers. We know they have to be replaced when they wear out, but tires also require some preventive maintenance. This maintenance will improve and extend the life of the tires, so it's well worth the effort and expense for Du Quoin drivers to get it done. Tire maintenance includes keeping tires properly inflated, rotating tires and balancing wheels.

The recommended tire pressure for a vehicle's tires is printed on a sticker on the inside of the driver's side doorjamb. A lot of engineering goes into calculating the correct pressure, so it's an important number for Du Quoin vehicle owners to know. Not following this recommendation can throw off the suspension system and can lead to tire damage. Underinflated tires wear out more quickly than properly inflated tires. Vehicles also get better traction and handling on properly inflated tires. Check your tire pressure at least once a week and add air if necessary.

Don't be tempted to add a bit of extra air to your tires when you fill them. Overinflated tires will cause the center tread to wear unevenly because of improper contact with the road. It will also affect the handling performance of your vehicle.

Rotating tires allows all four tires on a vehicle to wear evenly. Front tires get more wear than rear tires because they do most of the work on turns. Tire rotation allows all of the tires to spend time on the front of the car so they all experience the extra wear.

For most vehicles, tire rotation is simply a matter of moving the front tires to the rear and vice versa. Some vehicles, however, recommend a cross-rotational pattern. Other vehicles use asymmetrical tires, which means the right tires have to stay on the right side of the vehicle and the left tires on the left. Some vehicles use differently sized wheels on the front and back of the car and should not have their tires rotated.

What kind of rotation do you need? Check your owner's manual or talk to your service advisor at McPherson Automotive. Your owner's manual will have information about how to rotate your vehicle's tires as well as letting you know how often you should get it done. For most vehicles, that's usually every 5,000 miles or 8,000 kilometers Your friendly and knowledgeable McPherson Automotive professionals can also offer auto advice about tire rotation. A quick tire inspection can also indicate whether or not your tires are due to be rotated.

When it comes to tire maintenance for Du Quoin drivers, wheel balancing is usually what we know least about. Balancing a wheel is necessary to keep it in constant contact with the road. If a tire is not balanced properly, it actually hops along the roadway. You can feel this hopping as a vibration in your steering wheel if the unbalanced tire is a front tire. You'll feel the vibration through your seat if a rear tire is unbalance. Properly balancing your tires is important and will extend their life span, improve handling and improve the safety of your vehicle. When you replace your tires, the new tires need to be balanced.

Never use different sized tires on the same axle of a vehicle. In other words, your front tires need to be the same size and your rear tires need to be the same size. Mixing sizes can lead to some serious handling problems for Du Quoin drivers.

If you have an all-wheel drive or four-wheel drive vehicle, all four tires need to be the same size. If your tires are wearing out, you can sometimes make a new tire purchase fit within your budget by only buying two tires at a time. When you do this, the new tires should be installed on the rear of the vehicle. Rear tires are more in need of the traction than your front tires to avoid spinning out on slippery surfaces. If you drive a vehicle around Du Quoin, you need tires, so you need to know how to care for them. The safety of your vehicle can depend on the condition of your tires.

McPherson Automotive
1 E Park St
Du Quoin, IL 62832
(618) 542-9203
http://www.mcphersonautomotive.net

Cool Running (Water Pump)

Your vehicle is like you in a way.  When it gets hot, it needs to be cooled down.  And one of the key parts to keeping it cool is the water pump.

Now, that's a bit of a misnomer.  It IS a pump, but it's pumping coolant, not pure water.  Cooling off your engine is vital since it builds up heat when it creates power by burning fuel.  Your water pump acts as a way to recirculate that coolant.  It goes through a series of tubes and hoses through the engine where it picks up heat, then is sent off to the radiator to get rid of that heat.  Cooled off, the coolant is recycled through the water pump to start the journey again.

The water pump works by taking mechanical power from the engine, usually from a belt.  Obviously, that belt has to be in good condition and adjusted properly or else the water pump won't be able to do its job.

Here are some things to look for that will signal problems with your water pump.  If your heat gauge is erratic or showing a much higher than normal temperature, that could be a sign of trouble.  Another is if you hear a whine under the hood.  And if that gets louder when you go faster, get it checked right away.  You may see steam coming out from under the hood or coolant may be leaking. 

These signs signal that it's time for you to have a technician check to see where the problem is. Some water pumps are powered by a timing belt.  If your vehicle has that design and your timing belt is due for replacement, sometimes it's a good idea to replace the water pump too, even if it's working properly.  That's because the labor to replace the timing belt can be expensive and it may be wise to proactively take care of the water pump while it's disassembled.

Your service advisor will explain the options available and offer the best path to keeping your water pump doing its job.  Your engine's life depends on it.

McPherson Automotive
1 E Park St
Du Quoin, IL 62832
(618) 542-9203
http://www.mcphersonautomotive.net

Is Your Du Quoin Driving Severe?

People near Du Quoin, IL, often ask McPherson Automotive how often they should have a particular service done. It's a great thing to ask. You can look at your owner's manual or have your Du Quoin, IL, service advisor at McPherson Automotive look up your vehicle in a service database. What you find is often a surprise to people – there are actually two service schedules.

One is the regular schedule and the other is the severe service schedule. Service intervals are shorter on the severe service schedule. When asked, most folks in Du Quoin will say that their driving is normal and that the 'regular' schedule probably applies to them. 'Severe service' sounds pretty extreme – 'I don't drive like that.'

Well, here is what the manufacturers say constitutes severe driving conditions; you can draw your own conclusions.

• Most of your trips are less than four miles (six and a half kilometers).
• Most of your trips are less than ten miles (16 km) and outside temperatures are below freezing.
• The engine is at low speed most of the time – not on the highway. You operate your vehicle in dusty areas.
• You regularly tow a trailer or carry heavy loads.
• You drive with a car-top carrier.
• You do a lot of stop-and-go driving.
• You drive in very hot or very cold weather.

If that's severe driving, what constitutes regular driving? Well, it would look something like this: I live somewhere with moderate temperatures all year round – I'm thinking San Diego here. And I live close to a freeway on-ramp. Everywhere I need to go is right off the freeway, at least four miles (six and a half km) from my home. I can drive at a steady 60 miles per hour (100 kph) when I'm on the freeway.

I don't know about you, but that doesn't sound like my normal driving. It sounds more like ideal conditions. I live where it gets hot in the summer and cold in the winter. I run short errands around Du Quoin. Occasionally we load up for family trips.

For me, normal driving includes elements of severe service driving. So here's what I tell people: think about how you drive, where you live, where you go and what you are expecting to with your vehicle in the near future.

Picture a line with 'regular' on one end and 'severe' on the other, and make a judgment on where you fall. If your regular oil change recommendation is 5,000 miles (8,000 km) and the severe service recommendation is 3,000 miles (5,000 km), when should you change your oil? For me, it's closer to 3,000 miles (5,000 km). For my wife, it's closer to 5,000 miles (8,000 km). Your Du Quoin, IL, auto service advisor at McPherson Automotive will be happy to have this discussion with you and help you sort it out.

Just a quick word on why severe service intervals are shorter. One has to do with heat. That can either be external heat from the weather, engine and transmission heat from stop-and-go driving or working extra hard moving heavy loads or towing. The heat causes the fluids like oil and transmission fluid to break down more quickly, and then they aren't as effective.

Another factor is water. Moisture naturally collects in fluids as they cool. In your motor oil, for example, if you don't drive long enough for the oil to fully heat up, the water won't evaporate. Water in the oil can lead to the buildup of damaging sludge.

If you live where the air is dusty or polluted, fluids will become contaminated and filters will get dirtier more quickly.

So make an honest evaluation of your driving conditions. You've made the commitment to take care of your vehicles, so it only makes sense to follow the right schedule.

McPherson Automotive
1 E Park St
Du Quoin, IL 62832
(618) 542-9203
http://www.mcphersonautomotive.net