head upgrade...when?
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Elder User
Joined: Jan 2004
Posts: 706
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head upgrade...when?
When were the heads redesigned to help alleviate the plug blowout problem? I have a 2000 and am wondering if I have the improved design or the old one? I'm at 96k and am beginning to worry about this issue.
Posting Guru
Joined: Nov 2003
Posts: 2,107
Likes: 3
From: California Desert
Don't change your sparkplugs and you won't have a problem. I have/had 190k on mine until the same plug blew twice, the second time it took the helicoil with it. Now it's in the shop getting a used 2001 engine put in.
Fleet Owner
Joined: Jan 2004
Posts: 26,007
Likes: 575
From: Brentwood,CA
leaving them in to long will seal there fate. i have yet to see one truck in our fleet of 75 trucks blow a plug with proper maintance. the plugs get torqued every 50k and replaced at 100k. none have issues. the 3 trucks bought at auction from a closed company all had issues with blowouts. those 3 are now parts trucks sitting in the back lot.
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New User
Joined: May 2005
Posts: 19
Likes: 0
From: Minot
Yeah, I thought I heard something about the 2001 and up models being better about not blowing the plugs. Something about there being more threads used on the spark plug. I have also heard others say that one of the ford plants is where the bad heads came from. The mechanic I heard this from told me that a state fleet of fords bought from the bad plant had about 80% of their trucks blow a plug, and then another fleet in the southern part of the state had a fleet of fords, and not a single one of theirs blew a plug. From what i've seen though, it is almost always is on the passenger side head when they blow.
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