ORIGINAL: joco1
if the engine runs perfect how often do you change your glow plugs ? Once a year?
When the glow plug dies. As long as your engine is running well there is no reason to replace the glow plug. I have engines that have glow plugs that are easily 3 or 4 years old and they still run strong. Old saying comes in here..... "If it ain't broke, don't fix it"!!!!
Ken