Now you guys have me doubting myself. I certainly know the difference between diesel fuel and antifreeze. But the entire garage had already stunk of fuel, PB Blaster, WD 40, etc from doing this. When I drilled through too deep and the fluid filled up the GP port, I went with the assumption I drilled right thru the tip of the GP and I saw fuel.

But I guess it is possible I wasn't drilling perfectly straight and went through the wall of the aluminum head.

Let's stick with the assumption it is fuel. If that is the case, what is just beyond the tip of the GP? Because at this point I am thinking of retreading the port, plugging it up and run on just 5 GP's.

My concern with this is that clearly fragments of the GP (metal shavings, broken ceramic tip, etc) will be left in there, If I drilled straight back too deep what else could I have damaged? Will these fragments fall into vital areas of the engine like the cylinder, pistons, etc?

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Mike Mass
Freehold, NJ

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

1998 E300 TD - R.I.P.