Snapped bolt & twisted off Extractor?

[LameHoof65]

Not a bad day, but I've had better. Decided to clean up the E0 head and ready it for the machinist...Took out the rocker arm, removed the valve springs. Attempted to get a couple of exhaust man. studs out--no luck, so decided to take off the vacuum tree, and the brass water fittings to the heater hose, all went pretty good so took off the temp sending unit. Went back to studs after soaking in WD-40--even with vise grips just wouldn't budge. So went to the thermostat housing, first nut came out fine...second snapped..No problem---drilled a 1/4 inch hole in it, took my extractor and tapped it in with the hammer to get a bite---and Voila!!! twisted it off in the hole. I'm thinking the machinist will have better luck, what do you think---leave the two studs and the snapped bolt/extractor to him?? :roll:

 

[Asa]

got a torch of some kind? should help with those exhaust bolts

depending on where it snapped, i'd leave the snapped off bolt to a machinist, was it just the head of the bolt, or all the way down to the head?

 

[xctasy]

There is an EDM process which can remove these, um, 's.o.b.' bolts.

The answer is to heat and impact drive a pretaped M5 bolt. A small drill with a non hardened smaller bolt and a tap and die set should work. We have funny ISO M5 bolts which we use to sort issues like this out. You loctie them in, and then add CRC, wd40, kerosene, and then impact drive. If that doesn't work, heat and try again.

As soon as Ezi Outs other hardend steel abominations are used, you make the next fellow cuss and sware lots.



Some one said â€￾Never trust a man who doesn't drink“.

Since I don’t drink, go ahead and take the pi$$ outa me!

 

[LameHoof65]

I heated the exhaust bolts with a small butane torch and attempted to back them out..And then I thought---leave it to the machinist---I didn't want to crack the flange. And the bolt snapped pretty flat with the block the extractor snapped even deeper in the hole. I suppose those machinists have to earn a livin' too.

 

[63redtudor]

One of the best ways that I've taken out exhaust manifold bolts is with a cutting torch. Everything else I use left-handed drill bits. Extracters always seem to break or strip out.
Edwin

 

[rickwrench]

Mig welding a washer edge-on on the stub always seems to work for me.
Rick(wrench)