I HAVE A 2005 TRAILBLAZER AND HAD TO TAKE THE HEAD OFF AND NOW I HAVE FIVE BROKEN HEAD BOLTS THAT ARE BROKEN ABOUT AN INCH BELOW THE BLOCK. I GOT OUT THE REST THAT WERENT SEIZED UP AND NOW I CANT GET

50

Asked by Mar 06, 2017 at 09:17 PM

Question type: Maintenance & Repair

I HAVE A 2005 TRAILBLAZER AND HAD TO TAKE THE HEAD OFF AND
NOW I HAVE FIVE BROKEN HEAD BOLTS THAT ARE BROKEN ABOUT
AN INCH BELOW THE BLOCK. I GOT OUT THE REST THAT WERENT
SEIZED UP AND NOW I CANT GET THE REST OF THEM TO TURN AT
ALL IVE TRIED EASY OUTS I HAVE TRIED LUBRICANTS BLASTERS
ANYTHING UNDER THE SUN AND WELDING ISNT AN OPTION
BECAUSE THEY ARE INSIDE THE BLOCK WITH NOTHING STICKING
OUT I REALLY REALLY NEED A GOOD IDEA HERE ANYTHING THROW
IT AT ME

7 Answers

11,675

You may be down to drill and tap as an only option my friend.

74,155

I would take it to a machinist and let them deal with it. A spark erosion tool might be the solution. https://www.youtube.com/watch? v=fxx5lIGesjg

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WHAT KIND OF BIT WOULD BE THE BEST

50

IM NOT SURE WHAT A SPARK EROSION TOOL IS

74,155

Ask a machinist about that one as it is a highly specialized tool. Even drilling and tapping should be left to a good machinist because if you drill crooked you will ruin the block.

50

EVERY MACHINE SHOP I HAVE CALLED TELLS ME THAT THEY PROBABLY CANT GET THEM OUT I GUESS WE HAVE BAD MACHINISTS AROUND HERE

50

ITS A STEEL BOLT IN A CAST ALUMNUM BLOCK IS THERE ANY KIND OF SOLVENT THAT COULD DISSOLVE THE STEEL AND NOT THE ALUMINUM?

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