shoot my 03 just blew #4 and now I have only 15psi in the cylinder, did an engine swap and got the wrong 4.6 different timing cover just swapped them hopefully it works.
Yes, my 02 blew one this summer. 85k on the clock. I did a plug replacement a year and a half previous. Sure enough, AFTER I blew the plug I rechecked the torque on the others, 3 had lost torque and had to re-torque. I will check them at least yearly now.
Haven't had a problem with my '98 4.6L. 136k miles on her and on the way to Denver. Hope my bro never has problems with the plugs. I'll have to remind him to use anti-seize compound and a torque wrench every time.
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Present stable:
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'01 F550 4wd psd, '99 F150 Lariat 4x4 3.55 LS extcab shortie auto, Hedman shorties, true dual straights. This is what happens when you let an old fart run the grain cart.
I just blew cylinder 2 yesterday. A friend of mine is the service manager at the local gmc dealer who also owns the local ford dealer. They told me it looked like the plug backed out and pulled out 4 out 9 threads. They said I had 5 good threads and they chased it anyway to make sure they were clean of anything. I have an 01 f350 with the 5.4. It's odd i would have 5 threads left and earlier in a post someone said they only had 4 from the factory. 76k miles until first eruption. I'm checking the rest of them.
BUMP - anyone who hasn't voted in the poll, please do.
thanks!
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- art k. - Moderator for the Superduty, V10, and FE forums
'01 F250SD SC SB XLT V10 4x4 auto 3.73 Warn hubs Volant CAI, eBay headers and y-pipe - 5-star custom tunes on SCT X3
'97 Cougar XR7 30th Anniv Edition 4.6L
'74 F250 Highboy FE390 deceased! I've been wrong before, I'll be wrong again. Just wait and see.
We had this happen on our work van recently, and have heard there was a place in town that could fix it for $250 using something other than a helicoil. Any ideas on how they are doing it, and where i can buy the tool they are using?
I just done a plug and boot change on my 2000 5.4L expedition. Its got 152K miles now and the old plugs had a .075-.080 gap. It runs great now. There is a nice heli coil kit for this problem. If I blow one, then I will do all of them. $540 for the kit.
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2000 Expedition 5.4L Eddie Bauer
Krewat, you may be onto something....Maybe with the pre 03's having only the 4 thread count, they are easily being crossthreaded and that may be the cause of the blowouts?? Afterall, the plugs are quite deep down in the hole and you really can't see down there.. I have 94k on my 01 and I bought it used, so I BELIEVE they are the original plugs, so I think I may just leave them in there until I start having a problem.
Rich
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Current
2001 F150 SuperCrew 4x4 XLT
Ford definitely thought it was cross-threading or torque-related initially. I don't have any other information that what I already posted, but they did try to address the issue in about three different ways.
Cross-threading at the factory, incorrect torque at the factory, and the number of threads holding the plugs in.
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- art k. - Moderator for the Superduty, V10, and FE forums
'01 F250SD SC SB XLT V10 4x4 auto 3.73 Warn hubs Volant CAI, eBay headers and y-pipe - 5-star custom tunes on SCT X3
'97 Cougar XR7 30th Anniv Edition 4.6L
'74 F250 Highboy FE390 deceased! I've been wrong before, I'll be wrong again. Just wait and see.
My uncle just had one blow out on his '99 mercury marque 4.6L. 165K on it, blew the #3 cylinder, Tech said it took the head gasket with it. $1500 to repair. He traded the car in same day.
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Current vehicles:
98 Contour 2.0L auto, my new DD 49K 30mpg
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1986 F250XL Diesel RC LB 4x4 T19 4spd 4.10's?
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