Friday, September 21, 2018 Detailed Topic by Category
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Engines



When are Engine and Transmission Mounts Bad

Engine and transmission mounts isolate vibration and noise from the passenger compartment of the vehicle. When they fail, noises and vibration are normally the two first symptoms. If left unattended, other problems may also develop.



Why Does My Engine Use Oil

Engine oil is the lifeblood of an engine. Run out of oil, for just a few seconds, and the engine will be destroyed. With extended oil changes, oil loss is on the increase and not checking the oil level may lead to major problems.



When Is An Engine Overheated And Why, Part-II

Modern engines are designed to run within a narrow range of temperature. Because the metals used in an engine, expand at different rates, excess temperature causes a great many problems. Above a certain temperature, permanent engine damage will result.



When Is An Engine Overheated and Why, Part-I

Internal combustion engines convert fuel into mechanical energy and a lot of heat. When the heat of an engine is not controlled, by the cooling system, things get out of hand very quickly. At what temperature is an engine considered overheated and what happens when it is?



What Causes A Flexplate To Crack

A cracked flexplate is almost always a sign of other problems. If not properly diagnosed it will occur again and often damage to the transmission may follow.



Engine Idle Speed and Electronic Throttle Control

When we release the accelerator, the engine’s speed slows. At a preset speed the engine idle circuit takes over and the engine runs at the lowest speed possible without stalling. Watching the tachometer shows an idle speed around 500 to 900 RPM. The engine’s idle speed also changes, based on outside conditions. A computer is adjusting the idle speed, based on complex calculations.



When Do Spark Plugs Need To Be Replaced

Spark plugs come in an abundance of designs. Many claims used in selling spark plugs are vastly overstated or false. Very sound reasons also exist, why spark plugs should be replaced. Many reasons for replacement are not common knowledge.



How Does an EGR Valve Work

As the temperature of the combustion chamber approaches 2500 degrees Fahrenheit, nitrous oxide emissions increase. The fuel air mixture can also spontaneously combust, causing valve clatter and damaging the engine. Allowing a small amount of exhaust gas back into the intake reduces combustion chamber temperature. Regulating the flow of exhaust gas is the job of the EGR system.



What are the Symptoms of a Bad PCV Valve

The positive crankcase ventilation or PCV valve is an inexpensive and often overlooked component. It is also one possible cause of expensive oil leaks and sludge buildup in an engine.



Engine Thermostats, Fuel Mileage and Over Heating

Most folks realize an engine thermostat can cause a vehicle to overheat. Did you know thermostats are also one of the leading causes of poor fuel milage?



GM V8 Rough Idle and Misfire When Cold

After a few years, modern GM V8 engines are very prone to a rough idle and misfire when cold. The check engine light may also come on, with codes P0300, P0171 and PO174. Strangely, as the engine warms up, the roughness tends to go away, which seems confusing.



Preventing Water Pump Leaks and Problems

Water pumps are often likened to the heart of the cooling system. When the pump fails, the results are not pleasant. Most water pump failure can be prevented with a few simple measures.



Ford 4.6L Plastic Intake Manifold Problems

The 4.6L Ford engine has been installed in millions of vehicles over the years. It is the engine of the very popular Ford Crown Victoria, Mercury Grand Marquis, and Lincoln Town Car. These engines use plastic intake manifolds and from 1996 through 2001 there was a problem that can leave drivers stranded.  The problem is a sudden cracking of the intake manifold.



How Fuel Injectors Work

An electronic fuel injector is a precise and reliable component. Fuel injection is perhaps the greatest improvement made to modern automobiles. A fuel injector can regulate fuel flow within milliseconds. They do this for millions of cycles. Many people think such a precise device needs cleaning and maintenance. The truth may shock you.



GM V8 Losing Coolant With No Apparent Leak

If your General Motors SUV or truck is losing coolant, with no visible signs of a leak, the source may shock you. Worse, allowing the problem to go on may well mean a new engine.



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