Generally speaking, the torque specification for spark plugs can range anywhere from 15 to 35 foot-pounds (ft-lb) or Newton meters (Nm). Some high-performance engines may require higher torque values, while certain small-engine applications may have lower torque specifications.
Using the correct tightening torque is important to ensure proper sealing and compression of the spark plug, preventing issues like leaks, misfires, or damage to the spark plug or threads. Under-tightening can result in leaks and potential engine problems, while over-tightening can damage the threads or cause the spark plug to snap.
It's recommended to use a quality torque wrench to accurately apply the specified torque when installing spark plugs. Consult the vehicle's repair manual or reliable sources for the precise torque specifications for your specific make, model, and engine.
