What is the heat range of AC Delco spark plugs?
4,000 degrees Fahrenheit
Resilient and reliable, our spark plugs are designed to withstand the harsh elements of the engine. Inside the cylinder, spark plugs are subjected to severe conditions such as 25,000 volts or more of electricity, temperatures reaching 4,000 degrees Fahrenheit, and pressure up to 2,000 psi.
What is the heat range for spark plugs?
The optimal firing end temperature is approximately 500°C (932°F) to 800°C (1472°F). The two most common causes of spark plug problems are carbon fouling (< 450°C) and overheating (> 800°C).
What do the numbers mean on a AC Delco spark plug?
· 1st number denotes thread size. · 2nd number denotes heat range. In the early 1990s, an all-numeric, identification code was developed to ensure that the proper spark plug would be selected for replacement in specific engine applications.
Are AC Delco plugs good?
ACDelco GM OE (Professional) Iridium Spark Plugs are a high quality replacement ideal for many vehicles on the road today. Iridium composition of the spark plug provides a high melting point and great strength, and provides excellent wear resistance and durability.
Which autolite plug is hotter?
Autolite indicates the heat range with the last digit of the part number. For example, 3923 has a heat range of 3. The higher the number, the hotter the plug. The lower the number, the colder the plug.
How do I know if my spark plugs are too hot?
Blisters on the insulator tip, melted electrodes, or white deposits are signs of a burned spark plug that is running too hot. Causes can include the engine overheating, incorrect spark plug heat range, a loose spark plug, incorrect ignition timing or too lean of an air/fuel mixture.
What will a hotter spark plug do?
A “hot” spark plug has a longer insulator that prevents heat transfer into the water jackets. It keeps more heat in the tip of the spark plug, which helps burn off combustion chamber deposits. But if there’s too much retained heat, the engine will experience preignition.
Are AC Delco plugs pre gapped?
When ACDelco spark plugs are manufactured, they are pre-gapped to the correct gap specification. A: Not always, but you should inspect your spark plug wires for wear when replacing your spark plugs. Refer to your vehicle owner’s manual or contact the manufacturer for more information.
