what ever you do don'y try this yourself. I had two break off on me and i have the same car. first time I tried to drill it out, what a mistake. I drilled inot the head instead

I got a engine out of a wreck it was cheaper than a new head. the second time 20,000 miles later one broke again and the head had to come off to drill it out. the head is almost impossible to get for this motor. let a mechanic do it. I would run a diesel purge first to loosen the carbon buildup on the end of the plug. just be careful
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Trying to keep Jersey Fresh
1995 E300D 384,000,(Betty White) part time greaser, lots of new parts
2004 Ranger XLT

2000 Chocolate Lab-Bad Quarter Panel, lots of miles