The spark plug blowout defect/problem was fixed long before 2005. Are you sure it wasn't just the center of a defective plug blowing out, leaving your head in good shape?

 

i found the best fix for this problem. i suckered a local dealership into a trade. i got top price for the expo and a reasonable price for a chrysler town & country. no 4x4 but i'll survive!

 

There are no more thread in the spark plug hole and the plug looked fine other then the obvious damage from it being shot out of the cylinder head and being absorbed by the coil. Matter of fact, I believe if I were to re-gap it I could put back in the motor....

<?xml:namespace prefix = o ns = "urn:schemas-microsoft-comfficeffice" /><o>TSB 07-21-2 is for 1997-2008 ford motors...</o>

 

I have heard some BAD horror stories about some cases having to replace the cylinder head!! I have an 04 250 and an 06 Expedition KR. Ditto on the "I hope this never happens to me"!!!

 

Ok I've read and researched but i have a problem with a failed heli repair from the previous owner. It has a 14mm X1.25 Heli that has came out or should i say stripped threading. My question is whether this blow out or lose threads can this be repaired? Questions that came to mind was how much more of the head can be reamed out? In short can i go as far as 16mm .660 inches in diamater? Timeserts claims yes, but of course they want to sale their product.

 

I feel lucky for my 98 expedition with 176,000 miles has never had an issue with the plugs blowing out. Dont know if there is any hardcore truth to this but mechanics in my area are saying that most of the engines with this problem were the ones that used the plugs/heads with 4 threads.

 

I've got about 6K on my motor since I made the repair and everything seems to be going good. I only repaired the defective cylinder because I now have the repair kit and if it happens again it only takes about an hour to make the repair...

 

That figures, now that you have the kit you will never need it again. I wonder if everyone that has the potential to have this problem should just buy the kit, like insurance, and they may never have the problem.

 

If this is true then the kit is well worth the money...

 

Wa I feel the same way regarding insurance. I blew my number 3 a year ago and have not had a problem since. The kit is sitting in my garage collecting dust. But is there if needed.

 

Just like a Boy Scout"Always Be Prepared", It works for me.

 

My 2003 Expy blew a plug at 85,000 miles. My extended warranty paid for all the repairs required.