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What is the F7TC spark plug?

2 Answers

ElizabethMarie

09/04/25 2:48am

F7TC spark plugs are matching products for imported high-end cars. Details are as follows: 1. Performance All performances comply with the technical conditions of Volkswagen TL-VW938 and the national standard GB7825. This product is an M14×1.25 flat-seat projected type spark plug with a copper core electrode. Due to the new design, the heat absorption and heat transfer capabilities of the spark plug during operation are enhanced. 2. Classification Spark plugs are mainly divided into standard spark plugs, insulator projected spark plugs, electrode spark plugs, seat spark plugs, pole spark plugs, surface gap spark plugs, etc. Each brand's spark plug model is different, and the model is usually marked on the spark plug shell, representing material, size, heat value, resistance, and gap. Additional Information: The main requirements for spark plugs are thermal characteristics, tensile strength, heat resistance, conductivity, insulation strength, sealing, and corrosion resistance. Spark plugs must be heat-resistant. After being screwed into a crucible or muffle electric furnace heated to 700°C and kept for 10 minutes, they should be cooled in the air without cracking or any other damage on the insulator surface.

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Karl

09/16/25 3:57am

Last time I helped my friend replace the F7TC spark plugs in his old Jetta. These are Bosch's entry-level resistor spark plugs, where 'F' indicates a thread size of 12×1.25mm, and '7' represents a medium heat range suitable for most family cars. They work best for older Volkswagen models like Santana and Jetta. The copper-core electrodes are affordable, costing just over 20 yuan each, and easy to replace yourself. Just a reminder to avoid off-brand products - last year someone at the auto parts market bought counterfeits that caused engine misfires, and upon disassembly, the ceramic insulators were found cracked.

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