Do you guys agree with me that the Glow Plug is that perfect circle above and to the left of the drill bit? (10-11 o'clock position?) If that is the case, my large entrance hole is so off center that it would not only involve tapping the center of the GP and still trying an extraction, but I would have to enlarge the opening even more. It is already 1/2" wide (much larger than a GP thread.)

I can carve out the upper left side of the hole with a carbide tip on a Dremmel to create more room to pull out the GP, but then I would be left with an oblong hole which would make it impossible to ever install a Helicoil or Time Sert.

So here's the suggestions so far:

1. (renaissanceman) - Continue to extract the GP, then worry later about a possible way to patch the coolant breech. Issue here is IF I can get the GP out and IF I can actually patch the cavity, I will be left with the issue of a FUBAR entrance hole to install a Helicoil.

2. (ROLLGUY) - Leave remainder of stuck GP in there as to continue to "plug" the prechamber. Install a Helicoil in existing opening and screw in a threaded "Plug". (maybe in the form of a 1/2" set screw). The coolant cavity I created will still be open behind the plug I install, but from the looks of things as is, coolant won't have any way of entering the prechamber. Downside - I am committed to only run on 5 GP's, but at least I MAY be able to run?

3. (mostly everyone else) Find a refurbished head and spend lots of money replacing or use the wise tutelage of this forum to get me through doing it myself.

Does this sound about right?

__________________
Mike Mass
Freehold, NJ

1999 E300 TD 178,000 miles
2007 E320 Bluetec - Sold

1998 E300 TD - R.I.P.