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Message: <blockquote data-quote="Tazza" data-source="post: 18798" data-attributes="member: 82">I think heat would be a good start, as long as you don't drill too deep you won't need to pull the head off. If you don't go down to the tip nothing will fall into the cylinders. The head can be removed without pulling the engine but then you need a new head gasket. Its a last resort.Be careful with ez-outs, if they break off its like drilling through diamonds!!! heat and a good hit with a hammer is a good start. Even if you can slip a nut on the broken section and use a welder to weld the nut to the remaining glow plug. This works well on broken bolts, the heat also travels down and helps break the seal. Naturally remove the inlet manifold to gain access.Let us know how you go!</blockquote>