Heli-Coil removal?
Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

CadillacForums.com is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Results 1 to 9 of 9
Like Tree2Likes
  • 2 Post By 97EldoCoupe
Northstar Engines and System Technical Discussion Discussion, Heli-Coil removal? in Cadillac Engine Discussion; Hey guys, I am hoping you can provide some insight in my current situation. I am in getting ready to ...
  1. #1
    arctic_man's Avatar
    arctic_man is offline Cadillac Owners Fanatic
    Automobile(s): 2004 Deville
    Join Date
    Jun 2008
    Location
    The Sticks, MN
    Age
    28
    Posts
    273

    Heli-Coil removal?

    Hey guys, I am hoping you can provide some insight in my current situation. I am in getting ready to stud a N* with CCC studs, but the car was previously worked on and had helicoils installed before! So I have a couple of questions. I am told that a screwdriver filed down at about a 10 degree angle can get the coils out. Does anyone have a picture of this by chance? Or a different method to get them out? I know there is a helicoil removal tool, will that work? Lastly, I am assuming I cannot just drill them out, without damaging the block and digging helicoil pieces into the engine.

    Any other insight is greatly appreciated.

    Thanks!


  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Location
    Woodstock Ill.
    Age
    69
    Posts
    82,383

    Re: Heli-Coil removal?

    Never had to remove one, but this should help.
    http://www.google.com/search?q=helic...ient=firefox-a

  4. #3
    arctic_man's Avatar
    arctic_man is offline Cadillac Owners Fanatic
    Automobile(s): 2004 Deville
    Join Date
    Jun 2008
    Location
    The Sticks, MN
    Age
    28
    Posts
    273
    Thread Starter

    Re: Heli-Coil removal?

    Quote Originally Posted by Ranger View Post
    Never had to remove one, but this should help.
    http://www.google.com/search?q=helic...ient=firefox-a
    Hi Ranger,

    Thanks for the reply. I did do some google-foo before posting here too. I could not seem to find anyone to is going as deep as I am. A lot of the forum posts I found were basic removals. Not too deep. I will be ordering my studs from Carroll tomorrow. I have spoke with him previously and he mentioned the screwdriver tool also. If I am lucky, maybe he can loan it to me or send me some pictures.

  5. Remove Advertisements
    Cadillac Forums
    Advertisements
     

  6. #4
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
    Automobile(s): 2002.5 F55 STS - 67,500 miles, 2014 Explorer XLT FWD
    Join Date
    Feb 2006
    Location
    MD Eastern Shore, Kent Island
    Age
    77
    Posts
    57,139

    Re: Heli-Coil removal?

    Studs or not, I don't like the sound of this Heli-coil thing. That block has already been drilled and tapped oversize to accept the coils. I hope this works out OK ..............

  7. #5
    arctic_man's Avatar
    arctic_man is offline Cadillac Owners Fanatic
    Automobile(s): 2004 Deville
    Join Date
    Jun 2008
    Location
    The Sticks, MN
    Age
    28
    Posts
    273
    Thread Starter

    Re: Heli-Coil removal?

    Quote Originally Posted by Submariner409 View Post
    Studs or not, I don't like the sound of this Heli-coil thing. That block has already been drilled and tapped oversize to accept the coils. I hope this works out OK ..............
    Hi Submariner,

    Thank you for the reply. I agree, helicoils are bad business. The good thing is they were installed to accommodate oem bolts. So the holes are not actually any bigger. When I was originally planning this, I spoke with Jake and Carroll about it and they said their studs will work fine with a helicoil block. That being said, if there is interest, I can post the size comparison with the coils, oem studs, and Carrolls once I get those darn things out.

    My one hope is they did not use loc-tite on the helicoils. I believe you are not supposed to, but instructions usually can't fix stupid. The car never overheated before I put it away, so no concern on the block, but I do not want to take a torch to the bolt holes if I can avoid it.

  8. #6
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
    Automobile(s): 2002.5 F55 STS - 67,500 miles, 2014 Explorer XLT FWD
    Join Date
    Feb 2006
    Location
    MD Eastern Shore, Kent Island
    Age
    77
    Posts
    57,139

    Re: Heli-Coil removal?

    There were some pictures - maybe here in Northstar Performance - a couple of years back - someone was removing Heli-coils from a Northstar block by twisting one end out - sort of like collapsing a spring by twisting it smaller in diameter. I have removed several from iron blocks - no fun; no fun at all.

  9. #7
    vincentm's Avatar
    vincentm is offline Cadillac Owners Connoisseur
    Automobile(s): 1997 Cadillac Eldorado ETC
    Join Date
    Aug 2010
    Location
    Kennewick WA
    Age
    38
    Posts
    4,848
    You bought the studs from Tim, ive seen him remove helicoils from a Deville before, hit him up

    Carrollcadillac@live.com

  10. #8
    97EldoCoupe's Avatar
    97EldoCoupe is offline Owner of Northstar Performance
    Automobile(s): 97 ETC x2, 04 GXP, 04 STS x2, 97 ESC, 99 Deville, 05 SRX
    Join Date
    Mar 2007
    Location
    The Great White North
    Age
    31
    Posts
    2,600

    Re: Heli-Coil removal?

    Drill until you hit the heli-coil. That steel wire is very hard, you can't drill it. Tap the drill up and down on the top of the coil while the drill is turning, apply a bit of pressure. It will catch the coil, unwind it to the point where a part of it is protruding above the deck surface. Take the drill out of the hole, grab the wire with a pair of pliers and pull it out. It will unwind and come out. Works every time.
    arctic_man and 04GrandAmGT like this.

  11. #9
    arctic_man's Avatar
    arctic_man is offline Cadillac Owners Fanatic
    Automobile(s): 2004 Deville
    Join Date
    Jun 2008
    Location
    The Sticks, MN
    Age
    28
    Posts
    273
    Thread Starter

    Re: Heli-Coil removal?

    Quote Originally Posted by 97EldoCoupe View Post
    Drill until you hit the heli-coil. That steel wire is very hard, you can't drill it. Tap the drill up and down on the top of the coil while the drill is turning, apply a bit of pressure. It will catch the coil, unwind it to the point where a part of it is protruding above the deck surface. Take the drill out of the hole, grab the wire with a pair of pliers and pull it out. It will unwind and come out. Works every time.
    Hi Jake,

    Thank you for the reply. This is exactly what I was looking for. Hopefully, I can get drilling this week and post some results. My friend and I started this back in late May. So far it has been pretty fun, but we took off the heads and saw how far down the helicoils were and just shared a few curse words.

  12. Remove Advertisements
    Cadillac Forums
    Advertisements
     

+ Reply to Thread

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

What Cadillac(s) do you own? (Or type NONE)

Please select your insurance company (Optional)

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Bookmarks

Cadillac Posting Rules

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