How many other glow plugs have you attempted to remove? Your description of the initial "soft turn of the wrench "hints that this glow plug was severely weakened before removal even began. Is corrosion the culprit? Are any other plugs severely corroded?Ohighroof- thats what I used & it broke. A four sided easy out. I even made a little heat shield for the plastics & used my mini oxy/acetalyne torch to heat it a little.
Yes, it appears that the nut has sheared off at the joint where it may have been attached to the glow plug barrel by brazing or silver soldering. Probably over-torque caused it to shear - maybe on original assembly?Actually Doktor A tit doesn't look to be corroded. I thought it moved easily because of the WD 40 siting in the well for 2 days while driving it. Their is only the next one beside it that I believe is the same now, as it spins freely & wiggles the same. I can get a drill on it as it is & did. I had to use a carbide tip drill to drill the easy out. I cannot get reversible drills until tomorrow. As it is not blowing by I am good to go tomorrow. I will have to try these ideas on both cylinders tomorrow. I have found the nut portion from the glow plug but can;t seem to find the stem. I had it this morning.... You can see that nut has cleanly sheared off, their is no real sign of corrosion, just grease.
The hex head is not "brazed or soldered"- the body is one machined piece. Our group member with the broken plug problem claims almost no torque when his sheared.Yes, it appears that the nut has sheared off at the joint where it may have been attached to the glow plug barrel by brazing or silver soldering. Probably over-torque caused it to shear - maybe on original assembly?
A question for Doktor A from those of us who may have waited too long (~127k miles on my '02 now) to remove glow plugs. The '03 service manual states that on assembly, the glow plugs should be torqued to 115 lbs-in. Probably removal torque will be higher, but how high can removal torque be without risking this type failure, or even worse, damage to the securing threads in the head? I'm thinking that in my case I could attempt to remove my glow plugs while monitoring removal torque with my bar-type torque wrench and if no luck by the estimated max torque, wait for a glow plug failure before attempting more drastic measures.
50K sounds premature to me, as well. When you do have them removed, there really is no "inspection"-their operational status can be determined while they are still installed. Once removed for "exercising" and anti-seize treatment you may want to consider replacement instead. Purchased from after market sources- the Bosch glow plugs are not very expensive. Doktor AI expect(hope) to pass my 2006 to my children. 50,000 miles was just suggested as a maintenance schedule for the glow plugs. That seems short and what is the maintenance to be.
Should the plugs be pulled, greased, and re-assembled if they do have a life virtually of the vehicle but late replacement is sure to bring heartaches?
I have sorta penciled into my head that at 80k my vehicle will be about three years old and was going to have them pulled and inspected.