Exhaust manifold bolts broke in heads - The 1947 - Present Chevrolet & GMC Truck Message Board Network

softballnrd27 · 03-09-2013, 09:40 PM

I have 2 bolts that are broke off in the heads, 1 on each side . I tried easy outs and they broke off inside of the bolts. Now I can't get a bit to drill through them. Does anyone have any idea how I can drill these damn things out. I would rather not take the heads off if possible. I am just going to use help-coil for new threads so I just need to drill out the old bolts.
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ghettoluxury · 03-09-2013, 11:36 PM

I always put a larger nut up agianst the broken bolt and fill the hole full of weld. After it cools for a few minuates just put a socket on the nut and back it out.

farmtrucks · 03-11-2013, 12:50 PM

Quote:

Originally Posted by ghettoluxury

I always put a larger nut up agianst the broken bolt and fill the hole full of weld. After it cools for a few minuates just put a socket on the nut and back it out.

x2, that is they way I got 4 out of mine.

softballnrd27 · 03-09-2013, 11:59 PM

Don't have access to a welder.
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Jon01 · 03-11-2013, 03:33 PM

Quote:

Originally Posted by softballnrd27

Don't have access to a welder.
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Better get access, since ez-outs didn't work welding is the only other way to get them out without pulling the heads and taking them to a machine shop which will do the exact same thing.

harnalien · 03-11-2013, 01:21 PM

I had this same exact problem and the only option that worked for me short of pulling the heads was welding. Check my build thread if you want pics/tips. I rented a welder from home depot. Not sure if that's an option for you though.
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brad_man_72 · 03-11-2013, 01:57 PM

What all others have said. Tape off the exhaust ports, take the engine down to a muffler shop with some beers and a couple of nuts to weld on.

I don't know how id get out of bed if I didn't have a welder.
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03-09-2013, 09:40 PM	#1
softballnrd27 Always a work in progress Join Date: Jun 2007 Location: Harker Heights, TX Posts: 1,599	Exhaust manifold bolts broke in heads I have 2 bolts that are broke off in the heads, 1 on each side . I tried easy outs and they broke off inside of the bolts. Now I can't get a bit to drill through them. Does anyone have any idea how I can drill these damn things out. I would rather not take the heads off if possible. I am just going to use help-coil for new threads so I just need to drill out the old bolts. Posted via Mobile Device __________________ USMC Retired Never trust a man who can't laugh at his own fart! 2010 Silverado Crew Cab 73 SWB 5.3/4l80e Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=695168

03-09-2013, 11:36 PM	#2
ghettoluxury Registered User Join Date: Apr 2009 Location: Waynesfield Ohio Posts: 1,991	Re: Exhaust manifold bolts broke in heads I always put a larger nut up agianst the broken bolt and fill the hole full of weld. After it cools for a few minuates just put a socket on the nut and back it out. __________________ 1949 Five Window, 1973 Step Side, 2000 Z71

03-09-2013, 11:59 PM	#4
softballnrd27 Always a work in progress Join Date: Jun 2007 Location: Harker Heights, TX Posts: 1,599	Re: Exhaust manifold bolts broke in heads Don't have access to a welder. Posted via Mobile Device __________________ USMC Retired Never trust a man who can't laugh at his own fart! 2010 Silverado Crew Cab 73 SWB 5.3/4l80e Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=695168

03-11-2013, 01:21 PM	#6
harnalien TruckincrazY Join Date: May 2004 Location: Haslet, TX Posts: 493	Re: Exhaust manifold bolts broke in heads I had this same exact problem and the only option that worked for me short of pulling the heads was welding. Check my build thread if you want pics/tips. I rented a welder from home depot. Not sure if that's an option for you though. Posted via Mobile Device __________________ My build thread - '84 2wd w/ a 6.0 swap http://67-72chevytrucks.com/vboard/s...d.php?t=433595

03-11-2013, 01:57 PM	#7
brad_man_72 the boat guy Join Date: Jul 2007 Location: springfield mo Posts: 2,339	Re: Exhaust manifold bolts broke in heads What all others have said. Tape off the exhaust ports, take the engine down to a muffler shop with some beers and a couple of nuts to weld on. I don't know how id get out of bed if I didn't have a welder. Posted via Mobile Device __________________ 67, swb, fleet, tach, throttle, 5.3, 4l60e, 3.73's, fuel cell, 5 lug, p.d.b., 4-6 drop. great little truck 66, stevens drag/ski 18' silouette, 350, 2.02 doublehump heads. comp extreme marine 278 cam, vette 7 fin valve covers, old polished edelbrock intake, velvetdrive, casale v-drive, adj cavitation plate. 28, model a rpu project,



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