I've read about using PB Blaster, WD-40 directly, using Howes and other additives in the fuel to remove carbon from the glow plugs. Has anyone ever tried this Break-free carbon cutter? www.break-free.com/products/products_carboncutter_law.asp In preperation I've ordered the OTC glow plug tool and their injector remover as 4 GPs show dead with a multimeter and I'm afraid they've been that way for quite a while.
Glow Plug Carbon Removal
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First thing is DO NOT put liquid into the cylinder....... if you get liquid or mass amounts carbon into the cylinder hydro locking can occur.... if the engine is not rotated and debris/fluid not bown out prior to installation of the new GPs/injectors.
This is what I recommend as a procedure especially for Autolite GP removal....remove air cleaner if IDI.
To remove/replace gp's get a 3/8" 6 point deep socket and suitable ratchet, 8" piece of gas line hose that will fit on top of gp. Remove gp electrical caps blow or brush clean each area around gp's, loosen gp with socket until it turns freely (1-2 turns) remove socket and push hose on top, turn out gp. For the one under the injector lines on drivers side you can use a universal joint (hard) or a 3/8 box end wrench then the hose as usual (do not force or bend lines) Test GP's and check tips.
If you have it put (small amount) anti seize on threads of new gp, you can use hose to start plugs then finish with ratchet to 12 ft/lbs or 1/12th of a turn after bottoming( this is not much torque at all)
If I were you, I would remove all gp's to see what kind they are, if they are not "BERU/Motorcraft" pitch them and buy all 8 new, if they are Beru and test good re install. If some are bad get 8 new and save old ones that are good for backups.
NOTE***If any GP's are hard to remove from hole using the hose ...."STOP" call for assistance and wait for instructions.... DO NOT force the GP to turn out as tips can break off..
PS A big old blanket over the rad helps in laying on the engine.
There are instructions for the bringing of the cylinder to TDC so no parts of the GP ie tip can fall into the cylinder and require removal of the head(s) to retrieve them.
http://www.thedieselstop.com/forums/f30/glow-plug-removal-213737/
This is what I recommend as a procedure especially for Autolite GP removal....remove air cleaner if IDI.
To remove/replace gp's get a 3/8" 6 point deep socket and suitable ratchet, 8" piece of gas line hose that will fit on top of gp. Remove gp electrical caps blow or brush clean each area around gp's, loosen gp with socket until it turns freely (1-2 turns) remove socket and push hose on top, turn out gp. For the one under the injector lines on drivers side you can use a universal joint (hard) or a 3/8 box end wrench then the hose as usual (do not force or bend lines) Test GP's and check tips.
If you have it put (small amount) anti seize on threads of new gp, you can use hose to start plugs then finish with ratchet to 12 ft/lbs or 1/12th of a turn after bottoming( this is not much torque at all)
If I were you, I would remove all gp's to see what kind they are, if they are not "BERU/Motorcraft" pitch them and buy all 8 new, if they are Beru and test good re install. If some are bad get 8 new and save old ones that are good for backups.
NOTE***If any GP's are hard to remove from hole using the hose ...."STOP" call for assistance and wait for instructions.... DO NOT force the GP to turn out as tips can break off..
PS A big old blanket over the rad helps in laying on the engine.
There are instructions for the bringing of the cylinder to TDC so no parts of the GP ie tip can fall into the cylinder and require removal of the head(s) to retrieve them.
http://www.thedieselstop.com/forums/f30/glow-plug-removal-213737/
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1,265 Posts
I would just try removing them before going through the expense of buying a removal tool. Like Pete said, if you encounter resistance, stop. The hole in the head that the GP tip passes through is a bit larger than the tip itself, so if there is a small amount of swelling the plug can still be removed without putting up a fight.
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