Help With Rocker Bolt

[408 Beast]

Help Help Help!!!!

I killed my 408 and had to settle for dropping in a bone stock 351 so i can still get to work while i rebuild the 408.
Now here is my problem, I have never ran into anything like this and I hope some on you have and can help me with it.

The bolt in the exhaust rocker of the #7 cylinder broke off in the head so the bottom half is still down in there, any way to fix this without removing the head? or just tell me the best way you know of to fix this i have to get it repaired asap cuz the wife isnt too cosher with me driving her 2003 so much.

 

[Michael Yount]

You'll just have to try some different approaches - EZ-out extractors, reverse cut drill bits, if enough is sticking up - slot it and use a flat blade screw driver or grab it with vice grips. Sometimes you can use a hammer and chisel and slowly turn it that way. How/why did it break? Overtightened? If the threads are messed up, you may have to remove the head and have the machine shop remove/retap the hole. No way to know until you try some of the other approaches.

 

[Ourobos]

I had this happen to 3 bolts total in the past few months. I was always able to ezout them. If you do, make sure you center punch the bolt, and drill it as straight and in the center as possible. Drill it as big as possible and make sure the ez out is in good, because they can break too. Use a carbide bit if you have one or need one. It's really quick and easy, especially after you've done it once. Good luck!

 

[408 Beast]

yea, i believe it was over-tightened, my torque wrench took a dump when i had 4 rocker bolts remaining, so i guesstamated the torque of these, and this just happens to be one of them, and this happened after only 50 miles on the engine, so im pretty sure it was over-tightened and as soon as the bolt got heated up it became weak and broke off. I delivered the car to a machine shop today and they will have it ready tomm. for me to pick up. gonna cost $150.00 for the labor tho, i guess i should have just spent $50.00 on a new wrench and took the safe way out, but you learn from your mistakes, , , , ,ya' know.

 

[408stroker5.0]

Sorry Kind Of Off Topic but Out of Curiosity.... how come the 408 blew up on you?
Was it a radical or mild stroker?

Shon

 

[408 Beast]

it was a kinda radical motor, 647BHP, I let it set up while i was out of the state for over a year, and then the first thing i did was get in it and drive it just as hard as i could without doing any maint. or anything else for that matter.

i got back to Georgia from Florida, and immediately fired up my ole' stang and tried to drive it as i always had, it developed a slight skip and then #1 cylinder went out totally, when i pulled the plugs i could see it was the #1 so i pulled the head and the rings were shot, and i had driven it enough trying to get it back home that it now needs to be bored again so much for the 408 but maybe a 418?