World’s smallest centre electrode measuring 0.4mm in diameter; U-groove ground electrode; Tapered cut ground electrode… Read more .
The heat range of a spark plug primarily depends on the length of the insulator nose. The heat from the combustion is transferred from the insulator nose, through the centre electrode, to the plug housing and then to the cylinder head and the engine cooling system… Read more.
New DENSO spark plugs are pre-gapped and do not need changing. It is also important to note that DENSO plugs with a U-groove ground electrode require a special gap feeler gauge due to the U-groove. Read more .
Spark plug electrodes erode over time due to sparking and corrosion. The result is the widening of the gap and a subsequent loss of efficiency… Read more.
If you’re seeing any of the following, you probably don’t have the manufacturers recommended spark plug installed… Read more.
Distributor; Distributor cap; Fouling; Gapping; Ignition coil; Misfire; Pre-ignition; Projected insulator nose spark plugs... Read more .