hey guys oh how much i love my dads ford. well changed the spark plugs bc of cylinder #7 misfire. took it out and half of the plug loop on the end of the plug is gone just great. well i installed new ones after taking a magnet to the cylinder and coming up with nothing. truck ran great for 2.2 seconds and misfire this time oil pushing out the exhaust. i am thinking bent exhaust valve bc the spark plug had oil covered on it to. any suggestions? and this truck is so the i hate it and i am sure it hates me.

 

You screwed up major now the head has to come off. Theres a tool for removing the broken plug and if you couldnt get it out you could have taken it to the dealer they could have done it. Sounds like you just pushed the shank down into the cylinder and when you started it it broke stuff. its common for the plugs to break in those engines.. There is a method of doing it.. Sounds like your screwed.

 

Borescope it.

 

yea the plug itsell was fine its the u part on the end of the plug part of that was gone. guessing running to lean at some point. anyone have a right up on head removal on these in or out of the truck etc..

 

So your saying just the ground strap came off or was it the entire shank?. I dont think just the ground strap would have done the kind of damage your looking at. If it were just a bent valve you would just be having compression loss. Oil on the plug means there is probably piston or at least ring damage along with scaring on the cylinder wall. You likely need a complete overhaul.

 

That's why I said to borescope it - a lot easier to do that than pull the head. It would help your strategy for repair if you can see what the inside of the cylinder looks like.

 

So the ground strap melted away over time causing the misfire and a plug change made destroyed the head?

I'm watching Star Trek right now and the OP's explanation doesn't sound logical.

 

I think he is saying that the same thing that ate the strap may heve destroyed a valve. Running too lean.

 

But before the plug change it wasn't spewing oil out the tailpipe. Story doesn't add up with the goofy information we've been given, and any advice we give may or may not be helpful as a result. As glc stated a borescope is the only thing he can do IMO considering the lack of precise info we've been given.

 

ok guys for a little better the ground strap was half gone when i removed the plugs truck has about 22k miles on it. the who plug came out except part of the ground strap like less than a 1/4 of it. i put a magnet down in the cylinder to see if it would pick up anything got nothing did this several times figured it worked its way out idk how or where it went or when. replaced with ht0 plugs started back up had misfire cylinder 7 again looked at motor seen smoke and oil was pushing out side exhaust header gasket. i am thinking burnt piston at this point. will scop it and compression test tomorrow am. hope that helps so for any confusion prior stated.

 

I gathered something like that is what happened.

Did the ground strap look fried off or was it a clean break?

 

x2

 

Ive never heard of the ground strap just breaking off like that and you would think the oil problem would have been going on before if the ground strap just came of. Must of been something with the removal of the plug. With only 20k whatever miles you wouldn't think there would be that much carbon but maybe its a farm truck or what ever.
I would look for a used engine. or go with a Jasper reman. Sucky deal.

 

Well ... ... it's been 10 days. What's the deal?

 

If it was running lean enough to fry the ground strap off of the plug, then it probably started to put a hole in the piston. Once the plug died there was no more fire or heat to damage the piston any further. When the new plug was put in the fire came back and finished melting a hole in the piston.......probably started to go down hill from there.

But that's just my guess.