Z28Mike

Spent some money and recieved a new set of injectors, went to remove water neck from manifold and broke the bolt head off. Used an easy out tool and broke that off in the bolt. Now I cant drill down any more because the remover tool is made out of hardend metal....Any advice ? Any trick ? Would it be incredibly unwise to run w/o thermostat and just seal that sucker down ? I still have one bolt hole thats good and clean.

Who knew that replacing the injectors would lead to this mess. Man!!

Mike.

fawien

Ouch i wouldnt run that without a thermostat. If all else fails may need to take it to a machine shop or local garage to get it out all the way.

Sonix

iTrader: (1)

is it flush, or below? Or do you have a bit sticking up?

I had that happen with my stock manifold, I drilled it out, and re-tapped it. I'd do that if you can, use a carbide drill bit, it's hard enough to drill through your EZ-out.


There's also a trick to disolving iron, without harming aluminum... Chemical / electrical reaction. I forget it now, but search on that.

Red Devil

Find someone good with a welder.

The term for the electrical 'trick' is electrolysis. (You can do all sorts of things with that.) Anodize it and you have a solution and a nice finish.

Sonix

iTrader: (1)

I thought there was a chemical involved in the electrolysis as well... Aluminum sulfate or something? This makes it dissolve the ferrous, even if it's not rusted (as I would do with my electrolysis rust removing bath...)

Red Devil

It's usually some sort of acid based electrolyte iirc. You can actually make a patina, plate, add rust, etc. with electrolysis depending on what you are using for metal, anode and cathode etc.

'Slick' is the term I've heard before when relaying some of that info. 'Geek' or 'Nerd' has come up a time or three as well... but I usually point them in Vader's or RB's direction then.

There used to be a site that showed how to coat steel with SS electrolytically. Wish I still had the link. Good read iirc.

Z28Mike

The bolt is broken below the manifold. Ill go and get that carbide bit tomorrow. Thanks. What material do you think that remover is made of?

Sonix

iTrader: (1)

hopefully high speed steel.

Z28Mike

Thanks for your help guys, I spent about an hour on it last night with a dremel and a diamond tip bit. Ate it out good. On another note while replacing my injectors last night I noticed that a vacuum hose coming off the charcoal container was cut all the way through, it looks like it had been routed behind the alternator. I looked at the autozone vaccum diagram and it didnt help. All it showed for the hose was a dotted line going to nowhere. Im grasping for straws gentlemen. Ive relpaced my fuel filter, plugs, wires, cap, rotor, injectors, tps, egr, O2, and my car is still running like crap.

PUUURs Like a kitten at Idle. Runs like a 3 legged dog whenever some load is aplied. Between 2200-2600 rpm the engine seems to bog/not fire, after 2600 rpms the engine runs ok,,,,but when I get on it kinda heavy itll do the same thing it was doing at 2200-2600 rpms,,,,,kinda bog down.

Sonix

iTrader: (1)

hmm, if you're fishing for help on those problems, you'll have to cough up more info on your car. Year, induction, etc etc etc.

Got the bolt out though eh? Right on.

Z28Mike

Yea I got that bolt out...it was a pain in the rear but I got it. THankyou dremel.

The car is a 91 Z28 5.7 Tpi

rough

pulling any codes ?
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Sucks, i was just trying to replace my thremo and the damn bolts wernt coming off gave it a lil elbow and snap the bolt head came off what should i buy at the store, i got a drill, like a carbide maybe? i dont have ez out but i dont think i wana try it, whut size should i get ?? ty for help ahead of time