Rebuild or crate my 7.3??
Postmaster
Joined: Apr 2012
Posts: 2,613
Likes: 8
From: North Georgia
But its very rare. And i have not seen one so bad the electrode was gone from the top of the glow plug... its possible tho. Overtorqueing them can cause some interesting stresses on the electrode down hole for sure. I read a thread over on powerstroke.org, or the army about it where combined with combustion pressures, heat, and the overtorque caused the electrode to corkscrew. Wild stuff.
Lead Driver
Joined: Jun 2013
Posts: 5,647
Likes: 891
From: north of Minneapolis, MN
Yes.
But its very rare. And i have not seen one so bad the electrode was gone from the top of the glow plug... its possible tho. Overtorqueing them can cause some interesting stresses on the electrode down hole for sure. I read a thread over on powerstroke.org, or the army about it where combined with combustion pressures, heat, and the overtorque caused the electrode to corkscrew. Wild stuff.
But its very rare. And i have not seen one so bad the electrode was gone from the top of the glow plug... its possible tho. Overtorqueing them can cause some interesting stresses on the electrode down hole for sure. I read a thread over on powerstroke.org, or the army about it where combined with combustion pressures, heat, and the overtorque caused the electrode to corkscrew. Wild stuff.
Postmaster
Joined: Apr 2012
Posts: 2,613
Likes: 8
From: North Georgia
I dont know where you see a taper...
I just measured one to see...
Below the machined flats... the o.d. of the plug body is .320"
Below the threads... it is also .320".
Sitting across a 1-2-3 block... the measurement remains the same from below the threads - to the end of the body.
I just measured one to see...
Below the machined flats... the o.d. of the plug body is .320"
Below the threads... it is also .320".
Sitting across a 1-2-3 block... the measurement remains the same from below the threads - to the end of the body.
Postmaster
Joined: Apr 2012
Posts: 2,613
Likes: 8
From: North Georgia
I keep my indicating stuff with lots of dessicant packs but i still have to fight rust.
Are you talking about the top side(connector side) or the port side?
The "beveled edge" at the bottom of the port side of the body is turned, not crimped.
The seal is(visible) at the top of the body, and doubles as an insulator.
Still digging for that other thread about the plugs getting twisted.
Elder User
Joined: Nov 2012
Posts: 642
Likes: 0
From: Onlsow, NC
When I swapped my injectors i decided to do the glow plugs too. All came out nice and easy except for one. It took a little more effort but it broke loose, and after it was unscrewed and I removed the socket, all I had was the steel body. When I looked at the hole it came out of, there was the electrode sticking out. I couldn't get it out myself and had to take it to a mech (the reputable one mentioned in my previous post) to pull the head off and tap it out from the bottom side.
Logistics Pro
Joined: Nov 2006
Posts: 3,663
Likes: 363
From: Fallon,NV & Bainbridge OH
Not to be a total smart a$$ but that ain't no 45 degree angle and that would be the 4th hole as we read left to right, sorry couldn't resist. My attempt to be funny on only one cup of coffee. I knew what you meant.
I will have to go look at one in the garage but I was under the belief that it sealed at the threads but I am probably full of crap. It would make sense that it could corkscrew if it sealed at the bottom. The bottom could gall to the head and as the top was turned the body corkscrewed (twist), so it was probably from poor installation and not the engine that caused the one to twist up.
I will have to go look at one in the garage but I was under the belief that it sealed at the threads but I am probably full of crap. It would make sense that it could corkscrew if it sealed at the bottom. The bottom could gall to the head and as the top was turned the body corkscrewed (twist), so it was probably from poor installation and not the engine that caused the one to twist up.
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Postmaster
Joined: Apr 2012
Posts: 2,613
Likes: 8
From: North Georgia
Ya'll are not getting what im trying to describe...
The bodies of the "twisted" plugs im talking about were straight...
The electrodes were twisted, twirrled, or corkscrew-ed. (Whichever may be the correct discriptive term...)
Still digging to find the pictures...
If i cant... i will destroy one of these two to replicate what i saw and snap a picture.
The bodies of the "twisted" plugs im talking about were straight...
The electrodes were twisted, twirrled, or corkscrew-ed. (Whichever may be the correct discriptive term...)
Still digging to find the pictures...
If i cant... i will destroy one of these two to replicate what i saw and snap a picture.
Postmaster
Joined: Apr 2012
Posts: 2,613
Likes: 8
From: North Georgia
Yes.
I just tried to replicate what I saw and doing so proved incredibly difficult.
I got the electrode to just start to twist before the tip broke off..
The ones I'm trying to describe/replicate were exponentially more exaggerated. I mean they looked like a freakin corkscrew!
So.. without a considerable amount of heat... it would not happen during removal. Even then... something down in the plug ports would have to be squeezing the tip of the plugs for torque action to twist them up.
I just tried to replicate what I saw and doing so proved incredibly difficult.
I got the electrode to just start to twist before the tip broke off..
The ones I'm trying to describe/replicate were exponentially more exaggerated. I mean they looked like a freakin corkscrew!
So.. without a considerable amount of heat... it would not happen during removal. Even then... something down in the plug ports would have to be squeezing the tip of the plugs for torque action to twist them up.
Postmaster
Joined: Apr 2012
Posts: 2,613
Likes: 8
From: North Georgia
The plugs I keep referring to were German made Motorcraft.