Before I had a new battery, I dealt with hard startups already. After installing it, my Ford LN8000 would no longer start. What could be the problem?
There are two ways to know if both your old and new batteries were problematic and if you really have to return the new one for replacement. Get a tester and see if they are still working. You may also try if they would charge through the electric connection at home. If both ways tell that the batteries are good, you have to check the starter and the alternator to know which one prevents starting.
It's easy to know whether the starter is busted or not. Switch the lights. If they work, your starter is the problem. Perhaps, its bushings, wire rewind, or bearings are already defective. But in the case that the battery is not working while installed in the vehicle, you'll only know if the starter is damaged by opening it. If both the starter and the battery work, the alternator is no longer up for the job. You can either have it repaired or replaced with a new one.
I can hear repeated short intense squeaking coming from under the hood. Is that my engine?
Does the squeaking go after every two seconds? If so, your engine belt is most probably the one causing the noise. Pop your hood up, and check the belt if there are any frays and cracks. You probably have to replace the belt already. Remember to have a diagram of where the belt runs before you remove the belt. Draw or take a picture of it, just to be sure you can install the new one by yourself. Before installing the new engine belt, be sure to remove all the oil, grime, and excess rubber sitting on the pulleys. This will help prevent early disintegration.
Why is it that my Ford LN8000 requires new spark plugs too frequently? It's a real hassle and quite costly.
Early spark plug damage is commonly due to engine problems. If it turns out that the spark plug often suffers from terminal nut wear, the engine could be creating excessive vibration. Use more solid terminal posts to help resist vibration. Engine oil that reaches the spark plug also causes damage, and that is noticeable with deposits present. If you see broken ceramics or melted electrodes on the firing ends of the replaced spark plugs, engine overheating is the most possible cause. The solution to that is an efficient cooling system.
Mishandling during the installation also leads to early damage. If incorrect plug wrench is used, it may slip or be tilted while trying to install. The corrugation and caulked portion is then at risk of being hit. Use correctly fitted hexagonal wrench for the hexagonal-shaped nut, and a round one that fits correctly for the round nuts. Too loose or overly tight installation also causes the plug to get damaged earlier. Such a condition allows the combustion gas to leak through the threads. Consequently, the spark plug will overheat and fail.