Help, need advice
I have a 09 F150 STX with 136k miles on it. A year ago I had the dreaded loosening of the plug and it stripped the hole out. I fixed it with a tread repair kit I got from Napa. Well all was good until 2 days ago. I lost power and got the misfire code on the cylinder I repaired. Long story short, it's in the shop and they tell me that the head needs to be removed just to see if they can repair it. I guess my repair job was not too good! Anyways they say it will be $2200 just to remove the head and repair if its repairable. But there's no guarantee. The head could need replacing. I am waiting to hear back what a new head would cost. I am really hating ford now, I can't tell you. These guys are pretty straight shooters as I have dealt with them before. Just don't know what to do. The bottom end probalby has another 100k.
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Find a shop that can try a "BigSert" or get the kit and do it yourself.
http://www.timesert.com/html/bigsert.html I assume you have a 4.6 2 valve? |
Originally Posted by glc
(Post 5157493)
Find a shop that can try a "BigSert" or get the kit and do it yourself.
http://www.timesert.com/html/bigsert.html I assume you have a 4.6 2 valve? I can see the plug down in the tube, but the spark plug socket just spins. I am guessing the threads in the head stripped again? So can I just pull the plug out some how? Also, can I do this job without removing the head? One more thing. I drove it to the shop, about 4 miles. Is this advisable. I would like to fix this as I feel the motor is pretty solid. But I don't want to put thousands into it. |
I'm going to get a timesert kit. Nothing to lose. I put an insert in before, and it lasted more than 20k miles. The timesert looks better than all of the others. I just hope I can get the old insert out!
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Help, need advice
Timesert is the way to go. It locks in.
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You will need a BigSert, not just a Timesert, if you have a different insert in there already.
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Originally Posted by glc
(Post 5157552)
You will need a BigSert, not just a Timesert, if you have a different insert in there already.
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It's very rare for spark plugs to blow out of a 2 valve 4.6 or 5.4 built in late 2003 or newer, that's when they changed the heads from 4 threads to 8 threads. You may not be installing plugs correctly, the factory torque spec is way too loose.
You should be using only Motorcraft plugs, *NO* antiseize, and torquing them to 28 ft/lb. If worse comes to worse, the guys at blownoutsparkplug.com can probably help you avoid head removal. |
Has anyone done a repair with a big sert on a 09 4.6l engine?
I am pretty sure the kit I need is #5141E, and the insert is #51407. Can anyone who has done a repair of a repair confirm these numbers? I would like to order them tonight. Wow, it's a pricey kit at $332, but a whole helleva a lot cheaper than $2200 I was quoted. Funny thing is, they wanted to take the head off to see if there was internal damage. I hope that there isn't any internal damage. How much clearance is there when the piston reaches TDC? I guess I could get an inspection camera to take a looksey. Looking down the tube with a flash light and a mirror, there doesn't appear to be any damage to the piston. |
You can borrow/rent a borescope at some parts stores. You have to look at the valves for damage too.
I don't think I've heard of anyone else having to do a thread repair of any kind on the 8 thread heads, much less repair a repair! I would call Timesert and discuss your issue with them. |
Originally Posted by glc
(Post 5157664)
You can borrow/rent a borescope at some parts stores. You have to look at the valves for damage too.
I don't think I've heard of anyone else having to do a thread repair of any kind on the 8 thread heads, much less repair a repair! I would call Timesert and discuss your issue with them. - Jack |
I'd guess the exact opposite - seriously undertorqued.
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Originally Posted by glc
(Post 5157701)
I'd guess the exact opposite - seriously undertorqued.
Didn't use a torque wrench. I am going out and buy one! |
Originally Posted by ezed
(Post 5157725)
You are probably right!
Didn't use a torque wrench. I am going out and buy one! |
Originally Posted by glc
(Post 5157701)
I'd guess the exact opposite - seriously undertorqued.
Regardless, I'd certainly use a torque wrench. Clean the threads, and don't use any lubrication on them. - Jack |
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