NGK BR9EG Ter 4015 Spark Plug

Spark Plug Ngk Br9eg Ter. Fixed 4015 (4) In Modern Engines, Cylinder Heads Are Usually Made Of Aluminium, And With Heat This Material Expands More Than Spark Plugs, So Its Thread Seizes . Therefore, When Changing The Spark Plugs, The Engine Must Be Completely Cold . Features: - Loosen The Spark Plug That Is Mounted. - Before Removing It, Remove Deposits And Dirt From The Mounting Hole With The Help Of A Brush Or, If You Have The Means, By Applying Pressurized Air. - Unscrew The Old Spark Plug. - Remove Coarse Dirt From The Spark Plug Hole Area. - Hand Thread The Spark Plug Until It Stops. - Never Use Spark Plugs That Have Been Dropped On A Hard Surface Without Being Packaged. - Correctly Position The Indicated Wrench On The Spark Plug Nut And Tighten Moderately .