GO489

The glow plug must be able to withstand high temperatures, high pressures, vibrations and the attack of corrosive agents that develop during combustion.

The tip of the glow plug must be positioned very precisely in order to ignite the fuel. It must not in fact penetrate too deeply into the combustion chamber as it could trigger combustion incorrectly.

For these reasons replacement is problematic and glow plugs easily break in their seat. If the glow plug is still intact and cannot be unscrewed with the standard wrench, use the supplied Torx wrench and try to unscrew it by acting on the upper stem.