Table of Contents
What does the Y mean on a spark plug?
A copper center core is indicated by the letter "S". There is a fine wire gold palladium center electrode in the letter V. A V-grooved center electrode is indicated by the letter Y. The spark plug gap is indicated by the number after the number. via
What is the difference between RCJ6Y and RCJ8Y?
The only difference between plug RCJ6Y and RCJ8Y lies in their heat ranges. Understanding the similarities between them, however, can help determine if choosing the hotter or colder plug is necessary, as the two types are nearly interchangeable. via
What is the difference between RCJ7Y and CJ7Y?
They are interchangeable. The CJ7Y is a non-resistor spark plug. The RCJ7Y is the same plug with a resistor. They are both the exact same plug with the exception of the RCJ7Y being a spark plug with a resistor built into the porcelain. via
What do the letters and numbers mean on Champion spark plugs?
The combination of letters and numbers assigned for every Champion spark plug is a logical formula which indicates the major features of its design. The letters refer to the center electrode material, projection dimension and ground material. via
What does the Z mean in NGK spark plugs?
“Z” indicates a 10 mm x 1.0 with a 1/2″ reach. “G” indicates a 10 mm x 1.0 with a 3/4″ reach. The number (82 in this case) indicates the heat range of the spark plug, the higher the number the hotter the heat range (opposite of NGK and ND spark plugs). The letters after the heat range can indicate a number of things. via
Do I need a hotter or colder spark plug?
When making spark plug heat range changes, it is better to err on the side of too cold a plug. Running too cold a plug can only cause it to foul out, whereas running too hot a plug can cause severe engine damage. via
Can I use RCJ8Y instead of RCJ7Y?
According to Champion Heat Range Chart, Federal-Mogul Document #1521 RCJ8Y, RCJ7Y and RCJ6Y are same Thread Size (14mm, 3/8" reach, 3/4" hex). The difference is Heat Range, RCJ8Y is Hot, RCJ6Y Cold. If the engine manual recommends a RCJ6Y, but the only replacement available is RCJ7Y, I would use it. via
Is CJ6 same as RCJ6Y?
According the the Champion numbering system chart I'm looking at, the RCJ6Y has a "standard projected core nose" firing end design, whereas the CJ6 has a "conventional" firing end design. via
What does NGK stand for?
NGK stands for Nihon Gaishi kabushikigaisha, the Japanese name of NGK Insulators. via
What do the numbers mean on a AC Delco spark plug?
Numbering: · 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. via
What heat range spark plug should I use?
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). via
Are NGK Spark Plugs pre gapped?
While most NGK spark plugs are pre-gapped, there are occasions when the gap requires adjustment. Care must be taken to avoid bending or breaking off the fine-wire electrodes. If the gap must be adjusted, use a tool that only moves the ground electrode and does not pry between or against the electrodes. via
Do spark plug types matter?
The majority of spark plugs feature a copper-core center electrode. Copper is an excellent conductor of electricity – better than any other type of material used in spark plugs – and also transfers heat faster. Depending on the plug type, it can have a platinum or iridium tip on the electrodes to optimize performance. via
Can bad spark plugs cause check engine light?
Worn spark plugs or spark plug wires can trigger your check engine light to come on. This can cause your engine to misfire and your check engine light to pop on. A flashing engine light could mean that potentially catastrophic misfires are taking place, say our technicians. via