Use the correct deep socket size to loosen each spark plug one or two turns.В NOTE: To remove spark plugs from aluminum heads, allow the engine to cool.CAUTION: Use goggles to protect eyes from debris when applying compressed air to spark plug wells. Brush or air blast dirt away from the well areas before removing spark plugs.DO NOT grab or violently pull spark plug cables. If necessary, use a spark plug boot removing tool. Pull the spark plug boot and cable away from the spark plug. Grasp the spark plug boot and gently rotate it 90 degrees counterclockwise.Follow these steps for removing spark plugs for inspection, servicing or replacement: Pulstar heat range 2 is comparable to NGK heat ranges 8-9, Denso heat ranges 24-27 and Champion heat ranges 4-6/59-63.ДЄt this time the colder Pulstar heat range 2 is available in 3 designs, BE-2HT8В and HE-2HT10В and SE-2T8.Visually inspect spark plugs for signs of wear.Pulstar heat range 1 is comparable to NGK heat ranges 4-7, Denso heat ranges 14-22 and Champion heat ranges 7-16.Pulstar indicates the heat range by the number '1' or '2' in the plug number. For example, R6120-85 has a 8.5 heat range and R6120-105 has a 10.5 heat range. These are displayed as a 2 or 3 digit number after the hyphen. Some NGK Racing Plugs are also available in half heat ranges. A colder plug would be # R5671A-11 (heat range 11), a hotter plug would be # R5671A-9 (heat range 9). Starting with part # BKR6E-11 (heat range 6), a colder plug would # BKR7E-11 (heat range 7),В a hotter plug would be # BKR5E-11 (heat range 5).Д®XCEPTION: NGK Racing Plugs: (Any NGK plug that begins with the letter вЂњRвЂќ)ДЇor NGK Racing Plugs, the heat range is located AFTER the hyphen.Д®xample: R5671A-10 has a heat range of 10. (The number after theВ вЂњ-вЂњ is the gap.) NGK plugs are colder the higher the number, hotter the lower the number. For example, BCPR6ES-11 has a heat range of 6. NGK indicates the heat range in the middle of the plug number. Starting with part # IK20 (heat range 20), a colder plug would be # IK22, a hotter plug would be # IK16. Denso plugs get colder the higher the number, hotter the lower the number. For example, IK20 has a heat range of 20. The number at the end of the part indicates the gap.Дenso Iridium Power plugs feature the heat range at the end of the part number. For example, SK20PR-A11 has a heat range of 20. Starting with part # RCJ7Y (heat range 7), a colder plug would be # RCJ6Y (heat range 6),В a hotter plug would be # RCJ8Y (heat range 8).Дenso indicates the heat range in the middle of the plug number. (The 6 at the end of this part indicates the gap setting.) Champion plugs are hotter the higher the number, colder the lower the number. For example, RV15YC6 has a heat range of 15. Starting with part # FR6DC+ (heat range 6), a colder plug would be # FR5DC+ (heat range 5), a hotter plug would be # FR7DC+ (heat range 7).Д¬hampion indicates the heat range in the middle of the plug number. Bosch plugs get hotter the higher the number, colder the lower the number. For example, FR6DC+ has a heat range of 6. Starting with part # 24 (heat range 4), if you want a colder plug you would use part # 23 (heat range 3), for a hotter plug you would use part # 25 (heat range 5).Д«osch indicates the heat range in the middle of the plug number. The lower the number, the colder the plug. The higher the number, the hotter the plug. Autolite:ДЄutolite indicates the heat range with the last digit of the part number. For additional assistance contact our tech team at 88. If it exists, you can add the part to your cart. Once you have decided on a number, test to see if it exists by typing it into the search box. Examples have been provided below for some of the brands we supply. Typically, the heat range is indicated within the manufacturer's part number for each plug.

Ac delco heat range guide