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Disaster! Head bolt snaps off in block!!!!!

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  #21  
Old 04-18-2018, 03:45 PM
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BEFORE Jaguar forums: "I believe its safe to say my engine is ruined"


AFTER Jaguar forums: "it came out like butter"
 
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  #22  
Old 04-18-2018, 03:58 PM
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LOL - great to know we're not alone

@Joe - thanks for the follow-up and well done.
 
  #23  
Old 04-18-2018, 04:12 PM
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Congratulations on a successful result. Are you using new head bolts?
 
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Old 04-18-2018, 04:16 PM
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  #25  
Old 04-19-2018, 01:01 PM
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Default Disaster Averted!

Originally Posted by dsnyder586
BEFORE Jaguar forums: "I believe its safe to say my engine is ruined"


AFTER Jaguar forums: "it came out like butter"
Sorry for the dramatic tone of my original post but the sound and feel of the bolt snapping off deep in the block was gut-churning. Mind you that prior to this the most i've done re auto repair was a few water pumps and periferals but never a complete head gasket R/R. If not for the advice and help from the forum I would have never attempted or completed the job. Thanks all!


Can't wait to be on the road again!
 
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  #26  
Old 09-13-2023, 12:10 PM
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Default this worked for me

I realize this is a rather old thread, but my experience might help someone with the same problem.
Rather than using a bolt extractor or EZ-Out type of tool (I have had zero success with these in the past) I chose to use a set of left-handed drill bits (Warrior brand at Harbor Freight, about $8 for a set). The 3/16" bit had enough shank to reach the depth needed (approximately what you've shown in the photos) so I started with it. The hole I needed to operate on was the #2 on the left bank, and although the access was not terrible, the suspension tower was close enough that I couldn't fit the body of the drill in for a direct run; I bought a DrillPro 90 degree adaptor (Lowe's, about $20) to solve that problem.
I was concerned about beating up the threads inside the hole, so bought two 3/8" x 1/4" steel spacers (Lowe's, about $1 each) to line the hole.
While I was figuring this out I soaked the bolt hole with several changes of penetrating oil over a period of two days, occasionally using an old door hinge pin with a hammer to shock the bolt end loose . Before starting the operation, I hit the stuck bolt surface with a 1/4" centerpunch to help secure the end of the drill bit.
The 3/16" bit worked well (applied a few seconds at a time, on and off) and I used a small telescoping magnet to pull out the debris during the process. I finally felt the bolt end starting to come up, When that happened I switched up to the next size bit, and the bolt end zipped right out. I checked the threads by running in a new bolt (after cleaning the hole out thoroughly, using a disposable shop towel, silicone lubricant and a narrow bottle-brush). All good.
Hope this helps someone.
 

Last edited by aced704; 09-13-2023 at 12:15 PM. Reason: added info, corrected typo
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  #27  
Old 09-13-2023, 01:02 PM
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Well done....
 
  #28  
Old 09-16-2023, 07:09 AM
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Well done indeed. Congrats on saving the day, neighbor. I live near Kings Island so we may not be far apart. If you ever change your shocks or top mount I have just the ticket. I'd be glad to help. TM
 
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