Proper torque specs for both aluminum and cast-iron cylinder heads are listed below. As a result, the firing end of the spark plug can overheat and pre-ignition can occur. When installing spark plugs, a technician must be aware of the torque specification for that particular plug. Using a spark plug socket and ratchet, turn new spark plugs (18mm and 14mm thread size) a half turn (180) clockwise to tighten. Hand tighten the spark plug until it seats. However, it is possible to tighten the plugs satisfactorily without a torque wrench. Our unique, patented 'Field Effect' design also gives the Torque Master spark plug the ability to last many times longer than conventional spark plugs. A spark plug that is under-torqued will not be fully seated in the cylinder head and heat dissipation will be slowed. Spark plugs should be torqued to manufacturers’ specifications. has included a new types of spark plugs from the PREMIUM EVO series with the designation BR12BFXC (code 1938) BR14BFXC (code 1939) especially for Fiat, Chevrolet, Daihatsu cars and for Ducati, Honda, Suzuki and Yamaha motorcycles. The Torque Master spark plug has been designed, engineered and manufactured to provide maximum horsepower, torque, fuel economy and reduced emissions. Bull Ring Inner Bed Retractable Truck Bed Tie Down Anchors, Built for 2007+ Chevy Silverado & GMC Sierra, 2015+ Chevy Colorado & GMC Canyon, Fits in Truck Bed Stake Pockets, Easy Installation, 9 Pack.
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