hey guys i have a 93 f350 7.3 non turbo. i replaced all 8 glow plugs
1 month ago 4 have already went bad. i have 1 that screws out to
the last thread and wont pull out of the hole. any tool for this
or any suggestions.
thanks alot

 

Tip must be swollen.Spray with PB Blaster or WD40 and let soak in. Work the glow plug around and around and up at the same time. Don't force it or bend it to the side or you may break the tip off (BAD).You should bring that cylinder to the top of stroke first to give you a better chance to retreve a broken tip if it happens. What brand plug was it? Best to replace with Motorcraft/Beru only.

 

damn Autolite plug...I wish I had seen all the advice on the forums before I put them in!
I replaced all 8 a month ago, had 4 go bad already. Now I'm replacing them all with Motorcraft, if I can just get this last one out without creating a huge problem.
I'm trying the WD40 now. Thanks!

 

Bring it to TDC.......

The timing mark is found on a little plate that is on the front of the engine on the passenger side. The plate is mounted so it is very close to the main pulley on the lower front of the engine which is mounted on the vibration damper. On the side of the vibration damper, is a line, which when lined up with the line marked (O) on the plate, tells you that the #1 piston is at TDC(top dead center) You can see the line on the damper, and it points to the line on the plate with the (barely visible)O mark on it.You'll have to find a way to turn your engine over by hand (Crank/harmonic balancer bolt). Make sure you remove the power wire to the injection pump(so the engine won't start)and then rotate the engine until you can line up the marks.

The engine rotates in a clockwise direction as seen from the front of the truck, and for every 1/4 turn of the engine(crank) each next piston will arrive at TDC. So, When the line on the vibration damper is at the 2 oclock position, cylinders 2 and 5 will be at TDC. When the mark is at the 5 oclock position, cylinders 7 and 6 will be at TDC, 8 oclock has cylinders 3 and 8 at TDC, and back to 11oclock, 1 and 4 will be at TDC.

Cylinder numbers are assigned 1,3,5,7 on the right (passenger USA) bank from front of truck to back, and 2,4,6,8 on the driver's side (USA), front to back. Firing order is 1,2,7,3,4,5,6,8.

OK all the above is true...... to ensure the #1 piston is at TDC compression remove the inspection cover on the oil filler/gear cover. You will see a dowel pin from the IP if it is at 4 oclock that is TDC compression stroke, if it is at 11 oclock that is TDC exhaust stroke.......

I used a portable drill in reverse with the GP wired onto the socket/extension..... so I could pull and rotate the GP. It should if not swelled too much come out after wearing/reshaping the swelled area so it clears the hole.

If the tip does fall off at TDC then with the Injector removed you should be able to vacuum out the injector hole while blowing air in the GP hole .......... long story shortened. Remember to ensure the vacuum has a clean bag so you can recover/identify the tip is out.

 

Got it out in one piece! Thanks guys! I can enjoy my weekend now.

 

Glad to hear

 

It was a stressful afternoon that tested my patience.
Now I can unpucker and relax for the remainder of my weekend.
Thanks!

 

HAHA unpucker...i gotta use that 1