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  #16  
Old 12-31-2006, 07:29 AM
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When mine got stuck at 60K, I didn't have any build up in the prechambers. I saw them myself. When I took it out again, same thing. No build up. With my stuck GP, once the threads were drilled out the GP came out.

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  #17  
Old 12-31-2006, 08:20 AM
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I think there are actually both thread issues and carbon issues with these plugs. Some people experience problems with seized threads while others seem to experience carbon build-up. On mine, when they came out I can say the threads didn't seem to be an issue but the plugs were hard to turn (even after the threaded portion was completely unscrewed) and you could hear a squeaky binding noise coming from the end of them like they were scraping against a carbon deposit. So mine definitely had some carbon built up inside. I used a reamer and the new ones went in easily. I used anti-seize on them anyway but I really don't think it was a matter of the threads being tight at all. In hindsight it might have made sense to spray one of those carbon solvents into the holes too and hope they disolved some of the built-up deposits. I guess I will just have to wait until the next time I have to replace one to see what it is like now.
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  #18  
Old 12-31-2006, 08:20 AM
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Quote:
Originally Posted by aklim View Post
It was the dis-similar metals that siezed.
If true then please explain why we don't seem to have ANY instances of stuck glow plugs on OM601, OM602 or OM603 engines.
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  #19  
Old 12-31-2006, 08:23 AM
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Quote:
Originally Posted by TimFreeh View Post
If true then please explain why we don't seem to have ANY instances of stuck glow plugs on OM601, OM602 or OM603 engines.
I don't know. I just know that twice I have had the head apart and twice the prechambers were a little sooty but nothing crudded up. This was at 60K and 120K.

Edit: I have taken the head to the machince shop at 60K and the second time I took the prechamber out.
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  #20  
Old 12-31-2006, 02:23 PM
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If the GP's have flats, try using the old trusty Vice grip, grip tight and wiggle,and penetrate oil.

Hope it helps.
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  #21  
Old 12-31-2006, 04:22 PM
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Originally Posted by STIX240D View Post
If the GP's have flats, try using the old trusty Vice grip, grip tight and wiggle,and penetrate oil.

Hope it helps.
It would be hard to do that since the hole is not that wide. The tip at the top would break off first.
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  #22  
Old 12-31-2006, 11:56 PM
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I've used vise grips and penetrating oil on mine yesterday. Worked good.
Steve
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  #23  
Old 01-01-2007, 02:19 PM
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Well I have drilled out the plug as much as I dare to, the holes are drilled out to 9mm and the glow plug itself is 10mm so not sure if there is much more drilling one can do. I have also tried using an extraction tool, but no luck there either.

Sokoloff, I saw your image of the plug you drilled out, how did you get it out once you drilled it?

Still looking for some wisdom as to how to proceed.

Thanks,
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  #24  
Old 01-01-2007, 04:03 PM
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Which extraction tool did you try? There are various designs.
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  #25  
Old 01-01-2007, 05:15 PM
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I drilled and drilled, getting a little more afraid with each larger size drill I used. Then along comes my son and I guess he had more courage than I or maybe it was the fact that it wasn't his car. Anyway, he used a bit that was big enough to grab the sides of the broken glow plug and as soon as it grabbed the plug, the plug just came out easily, stuck on the end of the drill bit like a popsicle.

Len
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  #26  
Old 01-02-2007, 11:33 AM
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The extraction tool that I tired was one of those "Chisel Types" is the only way I know to describe them. 4 sided that taper from large to small with a sharp edge on each side for unscrewing.

Just am really worried about going to the next size drill bit up from the 3/8" that I have it drilled out to now, do not want to get into the threads on the head.

Any chance that I could drop the glow plug down into the chamber? That was my next fear while drilling, if I go up another size drill bit, and by pushing on the drill, push the plug down. Any chance of that happening?
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  #27  
Old 01-02-2007, 11:58 AM
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Have you tried to use an "easy out"?
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  #28  
Old 01-02-2007, 12:02 PM
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Have you tried using an extraction type drill bit designed to be operated counter clockwise (ie: reverse)?
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  #29  
Old 01-02-2007, 05:07 PM
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I did use the extraction type drill bit to drill out what I have so far. It would not even budge those bad boys.

Have not tried and easy out, not sure what that is to be honest.
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  #30  
Old 01-02-2007, 06:42 PM
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An easy out is like a tapered backwards tap tool that you would screw into the hole in the middle of the glow plug that you have drilled out. It grabs the inner edge and turns it counter-clockwise to unscrew it...it is used to get out broken bolts and screws. Sometimes they break off though and then you are screwed - no pun intended - because they are hardened steel and once they break in the middle of the piece you are pretty much out of other options.

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