snapped bolt - The 1947 - Present Chevrolet & GMC Truck Message Board Network

matt69 · 01-08-2003, 11:44 PM

the lower right bolt on my water pump snapped off flush with the block i tried to drill it out and either use an E Z out or drill it out bigger and tap the hole bigger, but does anyone have another suggestion of something i should try.

Longhorn Man · 01-09-2003, 12:00 AM

Yikes, I hate it when that happens.
I was too scared to even try to remove mine...and I had broken 5 exhaust manifold bolts when strippin down the Caddy engine.
Did you mess it up with the drill?

still w.i.p '68 · 01-09-2003, 12:05 AM

If you have a wire welder, you can put a nut over it, and weld the nut to the bolt from inside the nut, does that make sense? ,anyways weld it up, and with the new nut, combined with the heat it should come loose, always works for me.
lots of luck!

matt69 · 01-09-2003, 12:20 AM

ill have to see if i can get my hands on a welder and try that. it seems like the only thing that would work

Southpa · 01-09-2003, 02:09 AM

Hmmm, a few ideas come to mind, drill and tap then screw in a threaded insert to match the original size bolt.

OR/

Drill a hole in the bolt as far as you can, heat the bolt w/ a propane torch, then squirt water in the hole. The heat should expand the bolt and then fast cooling might make it contract away from the threads in the block. Then get an easy-out in there.

sakohntr · 01-09-2003, 11:17 AM

Use a left twist drill bit and it will either give you a hole for the extractor or spin the shank out. If things really get out of control you can try to burn it out as the metals are dissimiliar and then chase the threads with a tap. good luck

Low68 · 01-09-2003, 12:52 PM

Dang, I wish I had thought of that welding the nut thing before. That could have come in handy! Oh well. Bunch of good ideas.

01-08-2003, 11:44 PM	#1
matt69 Registered User Join Date: Nov 2002 Location: spring lake, mi Posts: 58	snapped bolt the lower right bolt on my water pump snapped off flush with the block i tried to drill it out and either use an E Z out or drill it out bigger and tap the hole bigger, but does anyone have another suggestion of something i should try. __________________ 69 lwb fleetside, 307 2wd

01-09-2003, 12:05 AM	#3
still w.i.p '68 Dreams are free Join Date: Dec 2002 Location: Hogansville Texas Posts: 546	If you have a wire welder, you can put a nut over it, and weld the nut to the bolt from inside the nut, does that make sense? ,anyways weld it up, and with the new nut, combined with the heat it should come loose, always works for me. lots of luck! __________________ '68 swb fleetside originally w.i.p '68 member since 1-01 w.i.p = ( work in progress )

01-09-2003, 12:20 AM	#4
matt69 Registered User Join Date: Nov 2002 Location: spring lake, mi Posts: 58	ill have to see if i can get my hands on a welder and try that. it seems like the only thing that would work __________________ 69 lwb fleetside, 307 2wd

01-09-2003, 02:09 AM	#5
Southpa Registered User Join Date: May 2000 Location: Victoria, BC, Canada Posts: 2,409	Hmmm, a few ideas come to mind, drill and tap then screw in a threaded insert to match the original size bolt. OR/ Drill a hole in the bolt as far as you can, heat the bolt w/ a propane torch, then squirt water in the hole. The heat should expand the bolt and then fast cooling might make it contract away from the threads in the block. Then get an easy-out in there. __________________ 1970 GMC 1500 Custom Original 350/TH350 Victoria, BC, Canada You can wish in one hand and crap in the other. See which one gets filled first.

01-09-2003, 11:17 AM	#6
sakohntr Registered User Join Date: Mar 2002 Location: Floodwood Minnesota Posts: 1,057	bit Use a left twist drill bit and it will either give you a hole for the extractor or spin the shank out. If things really get out of control you can try to burn it out as the metals are dissimiliar and then chase the threads with a tap. good luck __________________ 1967 K30 Napco 292/SM420 original paint 30k miles 1968 K60 Napco 396/5spd. dbl frame 52" michelins 1969 K10 SWB GMC 454/4spd 6" 35's posi,hooks 1972 C30 longhorn,BB/AT,A/C,Tilt,Toolbox,lokr 1987 K20 Chevrolet Suburban. 6" lift. 5.7L/TH400 1979 K60 GMC Coleman 4x4, 427/Allison.

01-09-2003, 12:00 AM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Yikes, I hate it when that happens. I was too scared to even try to remove mine...and I had broken 5 exhaust manifold bolts when strippin down the Caddy engine. Did you mess it up with the drill?

01-09-2003, 12:52 PM	#7
Low68 Registered User Join Date: May 2001 Location: Arizona Posts: 758	Dang, I wish I had thought of that welding the nut thing before. That could have come in handy! Oh well. Bunch of good ideas. __________________ Build Thread

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