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Impossible head bolt! HELP!

3K views 14 replies 10 participants last post by  stich626 
#1 ·
So I'm taking the heads off my 78 350. I have two top head bolts that are stuck TIGHT! I'm mean tight, I broke two sockets on them, and they are starting to get a little rounded, so I stopped. I also hit it with the impact, to no avail. And tried to carefully heat the block around them, but no dice either. I'm stuck, please help.
Zak
 
#7 ·
Done!

All this talk of drilling out the bolt and stuff, I got kinda pissed at the prospect of all that work for one bolt. So I went to Advance Auto and bought a 3 1/5 foot breaker bar, and these awesome sockets that remove stripped bolts. Having a little fire under you does wonders, it jerked right out. On a forum I read, it says that this came from the seal failing, and coolant getting in the grooves. Then mineral deposits formed that "cemented" it in. When I pulled it, I can see why, there was more mineral deposit than thread. I tried to get a pic, but they all turned out bad. Anyways, thanks all for the help!
Zak
 
#12 ·
Stuck Head bolts

I use BLASTER for all my stuck metal and it works great. MUCH better than WD-40 or others. Like any good "medicine", it looks bad and smells a bit too, but with a little PATIENCE and maybe 2-3-4 soakings, I get 'whatever' out. Been working on problems like this for over 50 years. Do this before grinding head off. Use NEW bolt set when replacing heads. :welcome:
 
#13 ·
I'd guess what caused the bolt to seize was it had no thread sealant on it when assembled and the threads go into the water jacket. I've had them snap off nearly flush, but they don't take much to get out once the head is off.
I keep a set of lefthand drill bits just for these scenarios. Drilling the broken remaining bolt progressively larger with a LH bit does a good job, and when the hole is large enough the bit usually catches it and turns it right out without an easyout.
 
#14 ·
1971BB427 said:
I'd guess what caused the bolt to seize was it had no thread sealant on it when assembled and the threads go into the water jacket. I've had them snap off nearly flush, but they don't take much to get out once the head is off.
I keep a set of lefthand drill bits just for these scenarios. Drilling the broken remaining bolt progressively larger with a LH bit does a good job, and when the hole is large enough the bit usually catches it and turns it right out without an easyout.
I hear everyone say how well the LH drill bits work for them

I have had a set I got from snap-on for years and years
I think they have worked twice,
I almost always have to use the ez-outs still
(but maybe they are loosing it up for the ez-outs)
 
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