sdski
Observer
So I got in there with a boroscope today and took a peek inside the cylinder and at the threads. I don't see any metal chunks in the cylinder, such as obvious pieces of threads, but obviously even though I shut it down right away they would still have been tossed around if anything had fallen in. Then I backed it out and checked the threads. The threads appear to be in tact from what I can tell, and there is definitely no obvious fresh metal. I can say that the sparkplug I pulled looks like it might have a few more than the 5k miles the previous owner claimed on it. The threads on the sparkplug also show no real damage, and no aluminum threads that had sheared off in it.
Anyways, I talked to a co-worker who had this happen on a 4.6, he said he bought a new plug, torqued it correctly and never had a problem again. He doesn't know exactly how many miles, but its been a while. I think at this point my plan is to get all new plugs, a new coil and pull all the plugs and torque the new ones correctly to spec so that I know it has been done right. I think I am just going to put a new plug in this hole, with no apparent thread damage I see no reason to drill out and helicoil, I think the plug was undertorqued and backed out. If the PO was correct these plugs have only been in there for 5k miles and were put in by a private shop, not the dealer.
As far as the axle, I have been thinking a lot about this, and it didn't help when Scoutkid brought it up, but maybe I should spring for the Sterling 10.5 rear. I wanted to go a little higher gear ratio than 3.73, but got the front to match the rear so I wouldn't have to re-gear. I can get a good 4.10 front and matching rear from the same guy I got the busted 3.73 axle from as a replacement, then I don't need to mess around with adapters and I have disks in the rear. It will cost me a little more up front, but I am hoping I can sell the current rear and recover a little of that and it will be a better rig in the long run. Deciding down the road that my 3.73s aren't enough is going to cost me a lot more than matching axles with 4.10s will right now... That is, assuming that I can get the axles without having a van to pick them up in.
Anyways, I talked to a co-worker who had this happen on a 4.6, he said he bought a new plug, torqued it correctly and never had a problem again. He doesn't know exactly how many miles, but its been a while. I think at this point my plan is to get all new plugs, a new coil and pull all the plugs and torque the new ones correctly to spec so that I know it has been done right. I think I am just going to put a new plug in this hole, with no apparent thread damage I see no reason to drill out and helicoil, I think the plug was undertorqued and backed out. If the PO was correct these plugs have only been in there for 5k miles and were put in by a private shop, not the dealer.
As far as the axle, I have been thinking a lot about this, and it didn't help when Scoutkid brought it up, but maybe I should spring for the Sterling 10.5 rear. I wanted to go a little higher gear ratio than 3.73, but got the front to match the rear so I wouldn't have to re-gear. I can get a good 4.10 front and matching rear from the same guy I got the busted 3.73 axle from as a replacement, then I don't need to mess around with adapters and I have disks in the rear. It will cost me a little more up front, but I am hoping I can sell the current rear and recover a little of that and it will be a better rig in the long run. Deciding down the road that my 3.73s aren't enough is going to cost me a lot more than matching axles with 4.10s will right now... That is, assuming that I can get the axles without having a van to pick them up in.