Glow Plug will not come out

[pcflip]

I Have a Glow Plug that will turn but will not backout
Has anyone came across this before and how did you remove it?

Thanks
Phillip

[grancito]

End is fried and expanded. Try to grip it and turn it while pulling and hopefully the end won't break off and stay in the combustion chamber.

[Husker 6.5]

Also, using the extension wand, spray WD-40 or other lubricant in around the glow plug to reduce friction and hopefully ease the swollen glow plug out without breaking. Note, if it breaks off inside the head, you'll have to remove the head to fish it out of the pre-combustion chamber or off the top of the piston depending on how big the piece that broke off.

[sixnickel]

The glow plug is in the pre cup . So if you pull the injector out you should be able to pull the broken tip out that way. I would plug the hole in the pre cup going into the cylinder with a piece of paper towel or something so the tip can't get away. Good Luck!!!

[trukdoc]

...I think it's a 3/8 sae{for you aggies thats fine thread}nut in half fit the pieces around the exposed threads on glo-plug hold the pieces in place with a box end wrench and screw out the plug...I have a tool made by diesel-pro that is basically what I just described with open sided spacers...if just the nut won't get the plug out space the nut out from the head with a 7/16 open end wrench for a spacer...I've changed god only knows how many glo-plugs over the years and broken off/blown out tips if it's a big enough piece to cause damage it won't come out of the pre chamber...if it's small enough to fall out of pre chamber ,it's small enough to blow out the exhaust...

[94K30]

...I think it's a 3/8 sae{for you aggies thats fine thread}..

3/8ths sae? 3/8th NF would be fine thread......

[trukdoc]

..."coarse" thread is uss..."fine" thread is sae...unless you're talking british standard or wentworth or of course the many variations of metric...

[Husker 6.5]

SAE is Society of American Engineers and set the standards for many things including thread pitches for fasteners. The two standard pitches for threaded fasteners (nuts, bolts and screws) are NC (National Coarse) and NF (National Fine). So using an SAE nut for the above described procedure you would have to use an SAE NF, not NC. SAE also set standards for NPT (National Pipe Taper) fittings, flare and compression fittings, etc.