Diesel Trucks

  • Fuel Contamination - How It Happens, and What to Do About It

    diesel fuel tank

    Is your diesel having issues starting up? Do you hear a knocking noise? Is there blue colored smoke coming from your engine? Don't ingore the signs, those could all be signs of engine failure. One of the leading issues that lead to diesel engine failure is fuel contamination. Fuel contamination comes in different forms, but always has the same result - engine trouble and fuel system failures. Here’s what you need to know about fuel contamination with diesel trucks, from Harold's Used Auto Parts Inc in Philadelphia, PA.

  • Fuel Flushing & Servicing Your Diesel

    diesel truck

    The fuel system is an integral aspect of any combustion engine, but it’s particularly important on diesel trucks. Your Ford, Dodge, or Chevrolet pickup requires a perfectly functioning fuel system, devoid of buildup, leaks, and debris, to provide you with the most powerful and efficient engine performance possible. At Harold's Used Auto Parts Inc in Philadelphia, we understand that fuel system flushing is an essential process in maintaining a properly functioning engine.

  • Fuel Flushing And Servicing On Your Diesel Truck

    diesel off road truck

    The fuel system is an integral aspect of any combustion engine, but it’s particularly important on diesel trucks. Your Ford, Dodge, or Chevrolet pickup requires a perfectly functioning fuel system, devoid of buildup, leaks, and debris, to provide you with the most powerful and efficient engine performance possible. At Harold's Used Auto Parts Inc in Philadelphia, we understand that fuel system flushing is an essential process in maintaining a properly functioning engine.

  • Getting the Most Out of Your Diesel

    4x4 diesel logo

    Performance chip installation is one of the perks of diesel truck ownership. At Harold's Used Auto Parts Inc in Philadelphia, PA, our mechanics can professionally tune and install a chip for any application, whether you drive a Cummins, Powerstroke, Duramax, or otherwise.

  • Glow Plugs and Your Diesel Engine

    engine

    Glow Plugs are an essential component of your diesel engine. However, a faulty glow plug can go unnoticed or be neglected for quite some time; your truck will still start and run, so it’s an easy issue to overlook. At Harold's Used Auto Parts Inc in Philadelphia, we want you to know what to look for, and why you should be concerned with a bad glow plug.

  • Have You Changed Your Oil Lately?

    Oil being poured into a diesel vehicle

    If you drive a Dodge, Chevy, or Ford diesel pickup, you know the amount of hard work your truck puts in. You may also be aware that diesels run a little dirtier than your average gas burner. At Harold's Used Auto Parts Inc in Philadelphia, PA, our goal is to keep your Duramax, Cummins, or Powerstroke truck on the road for many miles to come. A huge part of that is keeping your oil maintained.

  • How Do Diesel Systems Work & What Maintenance Do They Need

    diesel truck photo

    No matter what type of fleet vehicles or commercial trucks you maintain, the fuel system on your diesel is an integral part of keeping you on the road. Gas systems are pretty simple - there’s basically just a pump that pushes gasoline to the injectors. Diesels are a bit more complicated.

  • How Does A Turbocharger Work?

    turbo charger image

    Every year, more and more trucks come equipped with turbochargers. What was once a novelty or a performance option has become increasingly common as stock equipment. What are they for, and how do they work? Harold's Used Auto Parts Inc in Philadelphia, PA is here to help.

  • How To Increase Your Performance When Taking Your Diesel Off-Road Or Towing!

    Truck Off Road, driving through mud

    Is your diesel used for off-roading or towing? Are you looking for an increase in performance for your Cummins, Powerstroke, or Duramax truck? If so, a billet torque converter may be an option you’d like to consider. Here’s what you need to know about billet torque converters, from Harold's Used Auto Parts Inc in Philadelphia, PA.

  • How To Keep Your Diesel From Breaking Down.

    Differential being worked on

    Chevrolet, Ford and Ram diesel pickups are well-built machines. Still, sometimes they break down. Here’s what you can do to prevent that from happening and reduce the cost of a more expensive repair. At Harold's Used Auto Parts Inc in Philadelphia, PA our diesel customers are important to us and we want your diesel to last you.

  • How to Maintain Your Engine

    parked truck

    The fuel system is an integral aspect of any combustion engine, but it’s particularly important on diesel trucks. Your Ford, Dodge, or Chevrolet pickup requires a perfectly functioning fuel system, devoid of buildup, leaks, and debris, to provide you with the most powerful and efficient engine performance possible. At Harold's Used Auto Parts Inc in Philadelphia, PA, we understand that fuel system flushing is an essential process in maintaining a properly functioning engine.

  • Hydraulically Actuated Electronic Unit Injection (HEUI) Systems - How it Works

    diesel truck

    What is an HEUI System you may ask? When it was first introduced, HEUI systems revolutionized diesel technology in groundbreaking ways. Though other technologies have taken the forefront since its development, HEUI systems are still extremely common throughout the diesel industry. From our team here at Harold's Used Auto Parts Inc in Philadelphia, PA, here’s a quick look at how these systems work, and what the advantages are of having one.

  • If You Have To Turn The Key More Than Once - You Might Have A Problem

    diesel truck muffler with smoke coming out

    At Harold's Used Auto Parts Inc in Philadelphia, PA, our priority is keeping your Dodge, Chevy, or Ford truck reliably on the road. A major aspect of that is catching small issues before they become bigger ones.

  • Increase Your Performance When Off-Road Or Towing!

    off roading 4x4 truck

    Is your diesel used for off-roading or towing? Are you looking for an increase in performance for your Cummins, Powerstroke, or Duramax truck? If so, a billet torque converter may be an option you’d like to consider. Here’s what you need to know about billet torque converters, from Harold's Used Auto Parts Inc in Philadelphia, PA.

  • Injector Solutions Every Diesel Owner Needs To Know

    Injectors are a primary component on any diesel engine, old or new. Whether you drive a Chevrolet, Ford, or Dodge pickup, clean and fully operational injectors are an absolutely essential aspect of maintaining an efficient and powerful engine. At Harold's Used Auto Parts Inc in Philadelphia, PA, we offer a variety of injector solutions, from cleaning them, to diagnosing problematic injectors, to replacing them.

  • Is Diesel Right For You?

    under the hood of a diesel vehicle

    The automotive market is always fast-changing, and leaps and bounds have been made in the past couple of decades concerning both diesel and gasoline engines. With gasoline-powered trucks achieving more power than ever, purchase costs being lower, and fuel costs at an all-time low, many fleets are switching over to gasoline-powered fleets. However, diesel still offers some distinct advantages - it really depends on what you're looking for for your fleet of vehicles. Here are some points to consider, from Harold's Used Auto Parts Inc in Philadelphia, PA.

  • Is It Okay to Idle A Diesel?

    You’ve likely heard that diesel engines are ok to idle indefinitely, and that it’s even good for them. Where does this logic come from, and is it true? Harold's Used Auto Parts Inc in Philadelphia, PA has the answers.

  • Is It Time to Buy New, or Fix What You Have?

    Whether you drive a Chevrolet, Ford, or Dodge diesel pickup, there will come a day when it’s time to ask the question - has the time come to get a new truck? Harold's Used Auto Parts Inc in Philadelphia, PA is here to help you decide.

  • Is It Time To Replace Your Thermostat On Your Diesel Truck?

    Thermostat for a diesel truck

    You trust your diesel to get you to point A to point B every time you get into your truck. However in return, if your truck starts to act differently take the time to pause and listen to what your truck is trying to tell you. Issues can be as small as a thermostat going out, which if fixed now could reduce a more expensive repair down the road! The thermostat in your truck is a small, simple, and critical component. At Harold's Used Auto Parts Inc in Philadelphia, thermostat replacements are just one of many repairs we tackle.

  • Is Your Airbag Service Light On? Why You Shouldn't Ignore it!

    Every time you get into your diesel truck you probably forget all the safety features your vehicle has for you in case of an accident. Airbags are one of the greatest features of modern diesel trucks, though they aren’t often considered until you need them. From Harold's Used Auto Parts Inc in Philadelphia, PA, here’s a nod to one of the better vehicle advancements of our time and why it's important not to ignore warning signs.

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5347 Whitby Ave
        Philadelphia, PA

(215) 472-1552
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