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I would like to replace the plugs on my 2000 5.4. after reading all the horror stories about plug blow out its got me quite intimidated. is there any way to not have this happen? also do any of you know the torque specs for the plugs? i havent been able to locate it. your help is appreciated! I am brand new here to the forum and this is my second post in a row... i dont mean to use up my tokens lol
I believe this is related to your other post. I wish I could change the plugs on my Expedition, but I don't have the place to do it. My Eclipse and Yamaha motorcycle, no problem. In my own experience, the first guy to change the plugs on my 99 I thought he knew what he was doing. After #4 plug blew, I found a shop that could helicoil the threads and also replaced all the plugs with the CORRECT plugs I thought my buddy had used previously. Ask around, bottom line is find someone who has experience doing it and doing it properly. Hope this helps.
I can't find torque specs for a 4.6L or 5.4, but for my '98 windstar 3.8 it is only 7.5 to 15 foot lbs.
WHat's the deal with plug blow out?
__________________
BroncoJoe19
2006 Alt Fuel Jeep (electric)
'98 windstar 3.8L
'99 Crown Vic 4.6L
'90 Full Size Bronco 5.0L
I'm not a professional mechanic, take my suggestions with a grain of salt, or a cup of coffee
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5.4's head design has very limited thread engagement machined into the head, and it is a long way to get to the plug. This has resulted in a bunch of spark plug blow outs, where the plug's are blown out of the head. There is a subject on this on this forum if you search, also google 5.4 engine spark plug blowouts. Folks are trying to get Ford to do a recall, but because there are so many 5.4 engines out their, the reported number of this type problem is still relatively low. Most shops will want you to replace the head at $2000-$3000, but their is a repair kit out their that installs a helicoil in the head.
5.4's head design has very limited thread engagement machined into the head, and it is a long way to get to the plug. This has resulted in a bunch of spark plug blow outs, where the plug's are blown out of the head. There is a subject on this on this forum if you search, also google 5.4 engine spark plug blowouts. Folks are trying to get Ford to do a recall, but because there are so many 5.4 engines out their, the reported number of this type problem is still relatively low. Most shops will want you to replace the head at $2000-$3000, but their is a repair kit out their that installs a helicoil in the head.
Thanks for the explanation.
I try to learn something everyday.
__________________
BroncoJoe19
2006 Alt Fuel Jeep (electric)
'98 windstar 3.8L
'99 Crown Vic 4.6L
'90 Full Size Bronco 5.0L
I'm not a professional mechanic, take my suggestions with a grain of salt, or a cup of coffee
At the bottom of each post there is a little icon
Clicking it gives feedback to the moderators, and poster regarding which posts are most helpful.
Here is what my friends and I with X's have learned. As sealed as the coil appears to be against the head dirt does get down in the hole. It is very important that ALL the dirt is removed or it gets trapped under the plug so even if you torque it it has dirt sandwiched under it. After a few cycles the dirt / sand crushes and the plug is now free to move. So a very clean hole, anti seize and proper torque and all should be good.
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