blown spark plugs
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Joined: Oct 2006
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blown spark plugs
I have a 99 Expedition with the 4.6. i recently had a buddy replace the spark plugs. Yesterday the wife is driving the car and it suddenly begins to run very rough and become very loud. she gets it over to a car shop and the mechanic says that the ford motors were notorius for blowing spark plugs. In our case the spark plug wasn't threaded all the way in and basically backed out. Is it common for this engine to blow spark plugs out of their seat?
Postmaster
Joined: Nov 2006
Posts: 4,517
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From: SE Wyoming
Yes, and it is almost always due to improper torquing of the new plugs. If it only backed out you are extremely lucky, usually they spit out with the threads intact. The definition of common will be argued but it is a very well known problem with all the 2V modulars.
Posting Guru
Joined: Mar 2007
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Not always though from improper torqueing. My buddy at the track was switching his plugs, he had dirt or something on the threads. They are realy very fragile, I cant believe they didnt recall for this issue.
He was done for the day, we pulled both heads, drilled and replaced all the threads with a kit N.A.P.A.sells. We did all so we wouldnt have to do it again.
He was done for the day, we pulled both heads, drilled and replaced all the threads with a kit N.A.P.A.sells. We did all so we wouldnt have to do it again.
Senior User
Joined: Feb 2009
Posts: 491
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From: Southern Illinois
I have a 99 Expedition with the 4.6. i recently had a buddy replace the spark plugs. Yesterday the wife is driving the car and it suddenly begins to run very rough and become very loud. she gets it over to a car shop and the mechanic says that the ford motors were notorius for blowing spark plugs. In our case the spark plug wasn't threaded all the way in and basically backed out. Is it common for this engine to blow spark plugs out of their seat?
Senior User
Joined: Dec 2007
Posts: 181
Likes: 1
From: Ashtabula
Anybody tried the NAPA Sparkplug Rethreading Kit to fix a blown out plug?? It looks like a longer sparkplug with a coil type insert and a new coil boot for like $70.00. If it works that seems a better price than the other kits I've seen(time-sert,calvan etc).
Senior User
Joined: Dec 2007
Posts: 181
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From: Ashtabula
Where did you purchase the CalVan kit?? I started to order one online at DenLors Tools and when I went to checkout my computer said something about the sites security being questionable, so I did not put any credit card info in there. The price from them is $250.75.
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More Turbo
Joined: Jun 2009
Posts: 580
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From: Michigan
I bought mine from Calvav kit from a local tool warehouse, K tools in Wixom Mi. I paid around $250 also for mine. The kit comes with a dvd. so watch that first.
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Senior User
Joined: Jun 2002
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From: Big Canoe GA
o9's have the no blow plugs!!
Senior User
Joined: Dec 2007
Posts: 181
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From: Ashtabula
My CalVan kit showed up the end of last week, now I'm waiting for my mechanic to work on the truck--he's good, just does things at his own pace though. Anyhow I ended up calling and ordering it from DenLors tools, price was $250.75 and that included shipping--which only took two days.
Postmaster
Joined: Nov 2006
Posts: 4,517
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From: SE Wyoming
Yes they fixed it, so well that the plugs would stick in the head when you tried to remove them. I think by mid '05 or maybe '06 they got that problem under control.
Senior User
Joined: Jun 2002
Posts: 264
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From: Big Canoe GA
Yes, your rite, they just went from blow plugs to non removeable plugs lol!!!
More Turbo
Joined: Jun 2009
Posts: 580
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From: Michigan
Yah, I have heard about the plugs that get stuck or break off, I see there are tools available for this. I have not had any come in yet, guess I will have to get the stuff to fix them next. Anyone have any advice on what tool kit is the best and what tricks can make it easier?
New User
Joined: May 2009
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Is it a 3v / 2v thing or are 05 heads different than 04 3v heads ? I've noticed a few 04s with 3v engines in trucks and was wondering if they still blew out plugs.