c220cdi injector

[dave-t]

just replaced two glow plugs, to my horror found that one of the injectors was covered in hard tar and blowing. Although the allen stud can be removed how do you remove the injector? Is this knackered or is there a gasket/o-ring.
Any likely other problems?

Cheers

 

[Lambfoot]

Not much help I'm afraid, just sympathy. (Or should it be empathy?) The underside of my engine cover is covered with tar. Does anyone know of a solvent? Someone out there must know how to remove an injector, Haynes manual is a waste of money.