GM Truck Club
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Results 1 to 4 of 4
  1. #1

    Default Broken V/C bolt repair...

    So my Viking nightmare continues.... I picked up a used engine for my Suburban, as I stripped it of accessories etc.... I found it had a v/c bolt broken off flush with the head. I drilled a nice hole straight thru and proceeded to break off an ez out in it, below the bolt. I wound up driving it all the way to the bottom of the hole trying to chip it out. Drilling against it didnt work. Finally I used a die grinder to create holes around it, I got the damn thing out. Now I am left with an ugly large goofy hole.... What are some ways to fix.

    can i drill and tap jb weld?

    thanks in advance for your help...

    1989 Chevy V1500 Suburban 4X4, long tube headers & xover pipe. w/1985 350 4bbl.
    2002 Silverado 1500 5.3L Ext. Cab
    2005 Wrangler Rubicon 4.0L
    1990 Miata

  2. #2
    stephan's Avatar
    Join Date
    Sep 2010
    Far West, Oregon USA,
    Blog Entries


    I would get a thread insert & put in it to resize it back to the stock bolt size & thread pitch. This will make it a much cleaner repair. Stay away from helicoils. They are more difficult to use.
    Congrats on getting the broken off easyout, out of there. When I read that you had broken it off in a blind hole I thought you were sunk.
    1988 Chevy C-3500 2wd (no pic)
    350 c.i. 5.7 L Stock Block, 4 Bolt Mains
    L-31 Vortec Heads, Edelbrock Cam & Intake,
    Holley 650, Flowtech Headers, Magnaflow exh.
    Jet Trans 700R4, B&M Ratchet, 4:10 gears,
    3" susp. lift kit "shadetree"
    No rev limiter, No speed limiter lol

  3. #3


    Thanks for the reply, any others that can share their fixes?

  4. #4
    Sr. Apprentice
    Join Date
    Dec 2010
    25 Mi. E. of Kingman, AZ.


    How about JB welding a 1/4-20(or other size) nutsert into your over sized hole, maybe that would work. Put a bolt with release agent in the threads to keep them clean. As for broken bolt removal I sometimes weld a nut to the bolt and the heat helps with removal. I also have a set of left handed drill bits that help in times like this. Never had much luck w/small ez outs.

    Good luck with your new motor.

Similar Threads

  1. being broken in
    By kingpin in forum Member Introductions
    Replies: 8
    Last: 10-18-2010, 10:54 PM
  2. Broken exhaust bolt
    By egreg in forum General Chevy & GM Tech Questions
    Replies: 23
    Last: 10-09-2010, 11:02 AM
  3. 1997 Tahoe 10 bolt to 14 bolt swap
    By miaatch in forum Lifted & Offroad Suspension
    Replies: 1
    Last: 10-06-2010, 11:20 AM
  4. Broken leaf spring repair
    By ty052003 in forum Lifted & Offroad Suspension
    Replies: 4
    Last: 06-14-2009, 04:50 PM
  5. Broken bolt in the manifold
    By Sierra23 in forum GM Powertrain
    Replies: 1
    Last: 05-09-2009, 10:25 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts