Get the advice and know-how you need to complete that next repair job with these spark plug torque recommendations.

Mar 23, 2024 · A spark plug that’s too loose or too tight can be problematic. Learn how tight a spark plug should be in this article. Plus find torque recommendations.

Torque is one of the most critical aspects of spark plug installation. Torque directly affects the ability of the spark plug firing end to dissipate heat to the cylinder head. A spark plug that is …

NOTE: Spark plugs should be installed with clean and dry threads to avoid over-torqueing. This can distort the metal plug shell, which often results in engine damage.

To find NGK's recommended torque setting, please enter the spark plug number in the search box. While viewing the part detail page, click on the "specs" tab. If a recommendation has …

Using a plug wrench, tighten the plug to the recommended torque or the recommended tightening angle.

Install the new plug finger tight, and complete the installation with a torque wrench. Note: If using a torque wrench vs. plug wrench, please refer to the Torque Recommendations chart below.

RECOMMENDED TORQUE SPECIFICATIONS All engine manufacturers have recommended torque specifications for spark plug installation. Most are represented in the chart below.

The following torque chart should assist with selecting the correct torque recommended for different plug types. Note that there is a difference between cast iron and aluminium cylinder …

The table below lists the torquing specifications for most spark plugs being installed in either cast iron or aluminum cylinder heads. Torque values assume clean, dry threads.