'94 Ford 4.6 Spark Plugs

[Fifth87]

Just purchased a '94 Grand Marquis, story and pics to follow at a later date.
I am uncertain if the plugs have ever been changed, and with all I have heard/read about the 3 piece plug, threads pulling out or ejection, I am electing to pay to have this done. My question is this: Did Ford ever modify the plug design, so going forward I can change them myself without fear of breakage?

 

[Number_35]

My '07 F150 4.6 2V spit a plug randomly one day, so any model year can be affected

D

Thread 'Ford 2V spit a plug'

May 13, 2023

'07 4.6 in F150. About 235k miles

Yesterday it spit the #3 plug.

Can anyone identify this broken metal piece? It's .2485" with calipers, not mic. Edit: it's magnetic, thus ferrous

I still get 140# compression on this hole so valve stem seems unlikely?

The spark plug is in intact. The strap is closed up but other than that I can't make out an impact mark to the outside of the strap (if it appears so, it's just glare from camera/lighting)

• D60
• Replies: 16
• Forum: Mechanical/Maintenance Forum

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Is it still OK?

 

[D60]

Is it still OK?

Yeah I just torqued a new plug and it's been great since '23