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|Electrode Core Material:||Platinum|
|Electrode Tip Material:||Platinum|
|Ground Strap Quantity:||1|
|Manufacturer Heat Range:||4|
|Shorty Spark Plug:||No|
|Spark Plug Reach:||0.708 in|
|Spark Plug Seat Type:||tapered|
|Spark Plug Thread Size:||14 mm|
|Wrench Diameter:||5/8 in|
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Q:my car sounds like a motorcycle but is this spark plug really matter.
A:Generally sound occurs in a car by Spark Plug due to when part of the air-fuel mixture in the combustion chamber away from the spark plug is spontaneously ignited by the pressure from a flame front originating from the spark plug. The two colliding flame fronts contribute to the “knocking” sound. Knock occurs more frequently when using low octane fuel. Low octane fuel has a low resistance to knock (low resistance to ignition). Knock is related to ignition timing. (Knock is sometimes referred to as “Spark-knock”.). Retarding the ignition timing will reduce knock. In order to assist you further about NGK Laser Platinum Spark Plug (Part No. 5146), please provide the year, make, model and engine size of your vehicle application or you can contact us directly at 1-877-ADVANCE (238-2623) or visit your nearest Advance Auto Parts store for further assistance.