Help with broken off spark plug
Fleet Mechanic
Joined: Feb 2011
Posts: 1,812
Likes: 88
From: Thousand Oaks, CA
The 2V cyl head spark plug ports threads are too short, ...
That and dissimilar metals corrosion leading to plug extraction galling the cyl head threads. Carbon buildup on the 2V plug also causes removal problems as with the 3V plugs.
The heads have been redesigned since.
That and dissimilar metals corrosion leading to plug extraction galling the cyl head threads. Carbon buildup on the 2V plug also causes removal problems as with the 3V plugs.
The heads have been redesigned since.
I think the issue is more of the difference in expansion from heat between the dissimilar metals.
The plugs will work loose after many heat cycles and once loose the compression from one side pounds the threads.
The redesign in Nov. 2003 was adding more threads - 8 thread heads, which will still blow plugs, it just takes longer.
I didn't think the 2v spark plugs stick out like the 3v plugs, so there shouldn't be any carbon buildup.
Logistics Pro
Joined: Mar 2012
Posts: 3,507
Likes: 121
From: Oregon
The recommendation I made comes with a risk, hence why I said to be VERY careful when pushing the porcelain down. When you find yourself in poor situations like this sometimes you have to take a risk. And I agree, if that porcelain goes down into the cylinder as a big chunk, your not going to fish it out the spark plug hole. The head will have to come off.
To the OP: Did the center electrode come out with the portion of the plug that broke off or is it still down in the head with the other piece?
Cargo Master
Joined: Mar 2002
Posts: 3,132
Likes: 218
From: W (BY GOD) V
FORD released a SPECIAL SERVICE TOOL KIT to address this problem with the 3V where the insulator would break off in the same fashion as this 2V engine. It involves screwing a pin into the old plug with LOCTITE and then being able to then extract the insulator allowing an easy out to be used.
I would think ...
... (open to debate) that this method can also be used on the 2V.If you try and drive the insulator down enough to use an easy-out, the insulator may drop into the cylinder creating one hating life, beer drinking and wife beating scenario.
Now the downside to this is the kit goes for five hundred bucks but an aftermarket tool is available for thirty (I would a$$-u-me) this would be a one-time use tool.
Cargo Master
Joined: Mar 2002
Posts: 3,132
Likes: 218
From: W (BY GOD) V
You forgot to enter IMO. If they were adequate, there would be no blow-outs.
I think the issue is more of the difference in expansion from heat between the dissimilar metals.
The plugs will work loose after many heat cycles and once loose the compression from one side pounds the threads.
The redesign in Nov. 2003 was adding more threads - 8 thread heads, which will still blow plugs, it just takes longer.
I didn't think the 2v spark plugs stick out like the 3v plugs, so there shouldn't be any carbon buildup.
The plugs will work loose after many heat cycles and once loose the compression from one side pounds the threads.
The redesign in Nov. 2003 was adding more threads - 8 thread heads, which will still blow plugs, it just takes longer.
I didn't think the 2v spark plugs stick out like the 3v plugs, so there shouldn't be any carbon buildup.
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