Automotive Industry News & Information - Harold's Used Auto Parts, Inc.

Have you always wondered what a spark plug does? Our team here at Harold's Used Auto Parts Inc is here to help you out. It's simple in theory but does quite a lot of work for such a small piece of equipment. Your spark plug forces electricity to arc across a gap like a bolt of lightning at high voltage and fits into your engine's cylinder head, where it “sparks” to ignite the fuel and creates combustion within your engine. Without it, you wouldn't be able to drive your car or truck.

At Harold's Used Auto Parts Inc in Philadelphia, PA, our mechanics have diagnosed and repaired every transmission problem in the book. We’d like to pass some of our knowledge along to you, in order to help you understand your transmission a little better. Here, we discuss the synchronizers in your manual transmission, and how to know if one of yours is faulty.

Brake pads are important - you don’t need them to go, but you do need them to stop. At Harold's Used Auto Parts Inc in Philadelphia, PA, we like to keep your vehicle stopping exactly as it should - it’s less dangerous, and it keeps insurance premiums low. So, how do you know if your brake pads are going bad? How do they work? What even are they? We’ve got the answers!

If you drive a lightweight car, truck, or SUV, the torque converter you have installed is probably just fine. For those of you with more heavy-duty applications, like high horsepower setups or towing rigs, the stock converter may not be enough. At Harold's Used Auto Parts Inc in Philadelphia, PA, we can help you determine if your torque converter is right for the job you need to be done.

Your turbocharger will work in essentially the same way, whether you drive a Powerstroke, Cummins, or Duramax diesel pickup. While there are differences in designs and applications, turbos haven’t changed all that much over the past century. Now that you know what one is made of, we’ll look at how it works.

Fleet trucks, different models van and semi

While most fleet vehicles are chosen for their reliability, low maintenance, and durability, sometimes maintaining several of them at a time can become overwhelming. Let Harold's Used Auto Parts Inc in Philadelphia, PA put your mind at ease, with our fleet maintenance programs for any and all fleet vehicles.

At Harold's Used Auto Parts Inc in Philadelphia, we understand that big trucks mean bigger risk on the road. Here are some tips to remember, to reduce the likelihood of an accident resulting in large repair costs next time you're on the job.

It isn’t easy keeping your fleet or commercial trucks up and running. At Harold's Used Auto Parts Inc in Philadelphia, PA, we’re here to help. Fleet and commercial vehicles log a lot of miles, and a lot of hours - as a result, even the most reliable components need to be serviced occasionally. On an ordinary diesel, an injection pump may last the entire life of the engine itself. On vehicles that work harder than anything else on the road, this isn’t always the case.