Hyundai Sonata: Ignition System / Spark Plug Description and Operation

Description
A spark plug is a device for delivering electric current from an ignition system to the combustion chamber of a spark-ignition engine to ignite the compressed fuel/air mixture therein by means of an electric spark, while containing combustion pressure within the engine. A spark plug has a metal threaded shell, electrically isolated from a central electrode by a porcelain insulator.

Ignition Coil Repair procedures
Removal 1. Turn ignition switch OFF and disconnect the negative (-) battery cable. 2. Remove the engine cover. 3. Disconnect the ignition coil connector (A). 4. Remove the ignition c ...

Spark Plug Specifications
Specification ItemSpecificationTypeSILZKR7E8GGap0.7 ~0.8 mm (0.0275 ~ 0.0314 in.) ...

Other information:

Hyundai Sonata LF 2014-2019 Service Manual: Idler Repair procedures
Removal and Installation 1. Remove the drive belt. (Refer to Timing System - "Dreve Belt") 2. Remove the idler (A). Tightening torque : 42.2 ~ 53.9 N.m (4.3 ~ 5.5 kgf.m, 31.1 ~ 39.8 lb-ft) 3. Install in the reverse order of removal. ...

Hyundai Sonata LF 2014-2019 Service Manual: Injector Description and Operation
Description The GDI injector is similar to a standard injector, but sprays fuel at a much higher pressure directly into the combustion chamber and has a swirl disc to get the fuel swirling as it exits the nozzle. This aids in atomization of the fuel. The ECM controls both the feed circuits ...

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