OM 606 Drilled too deep trying to extract a stuck Glow Plug - PeachParts Mercedes-Benz Forum

ah-kay · #10 04-12-2016, 03:02 PM

Quote:

Originally Posted by funola

This prechamber diagram is from a 190D and may resemble your 606 prechamber. Per Kartek, you would have had to drill through the glow plug then through the opposite side of the pre chamber into the aluminum head casting for coolant to leak into the pre chamber. In that case, the set screw is not going to help....it will hydro lock.

Can you measure how deep you actually drilled? It would be useful information for others attempting the same job in the future. You shouldn't have drilled more than 1/2" before tapping ( where most of the meat on the glow plug was). The glow plug gets smaller in diameter the further in you go. What were you thinking?

Isn't it FACTUALLY CORRECT as per the picture that the injector is over the GP?

It took a lot of effort for the PO to drill through the pre-chamber plus the aluminum head, and a looong drill. The head is toasted. What was done was done, move on. It may be possible to remove the pre chamber and plug the hole with a set screw. But with no dis-respect to the PO, I would leave it to the professional.