Originally Posted by
stefan
Hi guys,
the long body plugs are longer OUTSIDE of the head button, the do not stick further into the combustion chamber. The longer body will dissipate heat quicker than the short body, that's why the plug is called "colder". The shorter body plugs heat up quicker that's why they are called hotter.
In addition to the different body style you have the different wire sizes. It can be very confusing
I think you mixed up somewhere ....... C8TF is the coldest type, infact it is a short body glowplug. F means Freda, or Cold.
C8TC is the second coldest ( ranked before C8TF ). It is a long body glow plug. C means Calda, or Hot.
Here is the rank, from hottest to the coldest :
C5TC EXTRA HOT - long body = C
C5TF VERY HOT - short body = F
C6TC HOT
C6TF SEMI COLD
C7TC COLD
C7TF VERY COLD
C8TC VERY COLD
C8TF EXTRA COLD