stuck glow plug

**john norris** · 12th March 2013, 17:07

tried to change glow plugs today one was stuck used lots of penetrating fluid but the damn thing broke

I now have a plug stuck no thread holding it in and i cant get it lose what can I do?

**bladeage1** · 12th March 2013, 17:54

Maybe you can get a stud extractor on it???

Did you get the engine really hot and up to operating temperature before attempting to remove?

**bladeage1** · 12th March 2013, 17:56

....Have you snapped the top of the plug off? or have you destroyed the threads of the actual plug hole?

**john norris** · 12th March 2013, 18:05

the top has snapped off and yeah it was up to 90

**bladeage1** · 12th March 2013, 18:34

If you can get a stud extractor on it then that should do the trick, work the plug in and out though and a little at a time....do not spray wd40 on it as it will seize the plug in and lock it in place whilst the head is hot! Wd40 etc is a nightmare with heat or alloy! Remember to reheat the engine before trying again.

The common reason for this happening is carbon build up around the bit of the threads that protrude through into the chamber, if you wind in and wind out often enough the carbon will loosen and fall off.....bit at a time and it/they will loosen enough and come out.......lol.....try it on a Merc!....dare you.

**bladeage1** · 12th March 2013, 18:38

.....forgot to ask,

has it snapped flush to the head? if not there are other tools that may remove it, if you have not done any stud extraction before it may be an idea to take it somewhere who do it for their living!