Glow plug Guru

['84 C20]

Question is - does this procedure work?

BROKEN GLOW PLUG REMOVAL.
REMOVAL – METHOD #1

• Place finger over fuel injector nozzle port, Rotate torsional damper to raise piston in affected cylinder to “Top Dead Center. ” Compression will change when “Top Dead Center” is reached.
• Unscrew and move glow plug back and forth to break off glow plug tip into cylinder head prechamber. WARNING Compressed air used to remove glow plug should never exceed 30 psi (207 kPa). Use only effective chip guarding and personnel protective equipment (goggles/shield, gloves, etc.). Failure to follow this warning may result in serious injury to personnel.
• Direct compressed air into glow plug port to remove glow plug tip through fuel injector nozzle port.
• If preceding procedure does not remove broken glow plug, remove cylinder head. (See paragraph 3-7) 3-178 Change 2

How dangerous is about 3/8” of glow plug in cylinder if the procedure doesn’t work? Bought an ’85 M1008 with a 6.2 and while changing the stock 13’s with g60’s, 3 were missing the end. The rest look whole. Is there enough room in the head for a piece of the glow plug?

 

[longbedder]

There's nothing wrong with that procedure.

Another one is to unscrew the glow plug as far as you can, then pull on it and keep unscrewing so the mushroomed end bites into the threads on the chamber side. Throw a rag over it and crank the engine with the starter - that tip will usually come flying out like a .22

If all else fails pull the head. A plug tip floating around in there will do no good for your engine.

 

['84 C20]

Thanks for the reply Longbedder.

Unfortunately, there was nothing left of the end. When I took the plugs out they came out easily, just broken off.

I am wondering if the previous owner cranked/ran the engine with the pieces in the cylinder. I am going to try and blow out the clylinders and compression check the engine before trying to start it. If the compression check is not good I probably will pull the heads for a look-see.

I bought the truck not running from a GSA auction. Excellent body for a 24 year old.