The one dead one that refuses to come out on my 6.2 is in there for good--the tip has to be bent at 90 degrees or swelled up so large it will have to break off before it would ever come out..
I have unscrewed it,chucked it in a drill,and run the drill in reverse a good 5 minutes,no dice--it comes out about 1/2",that is it,then you can feel the tip being too large to come thru the hole in the head..
I have even unscrewed it,started the engine,and driven the truck 50 miles and it never blew out!..some puffs of compression leaked by it for a few seconds after it started,then it sealed itself up and the engine ran normally the entire trip..
I tried one more time to extract it after that ride while the engine was still hot,but it just isn't going to come out..I screwed it back in and said ***k it!..
I think those tools only succeed in breaking the tips off if they are really "stuck"..
A set of 8 60G's around here is more like $80-$90 at parts stores,and I don't have the money for them now--I'm cancelling my cable tv today because I'm not going to hand over $89 to watch the same shitty programs and repeats and stupid commercials ,it is just a ripoff--I'm going next door to the Comcast store to the AAA office and subscribe to AAA with the money I'd have paid for cable,so I can at least get my junk towed home when it dies on me instead..
If I didn't have to blow $1200 on property taxes and nearly $200 on house insurance ,I'd have the money to buy a new set of glow plugs,a spring hanger,and fuel tank & sending unit..but I don't--and I'm not exactly thrilled about blowing $400 more on those parts that I cant install till after winter ends,when I cant really use the truck and trust it in the meantime..
I'm going to try the hair drier or torch trick if the truck refuses to fire up today--its 10 degrees out now,but is expected to hit the 40's around noon--hopefully it'll start then without any grief..