Big-Sert Head Repair - Can it be Done Without Removing the Engine?
Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds / (Old System)

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 15 of 15
Northstar Engines and System Technical Discussion Discussion, Big-Sert Head Repair - Can it be Done Without Removing the Engine? in Cadillac Engine Technical Discussion; I'm interested in head repairs that can be done without removing the motor. I understand that the heads cannot be ...
  1. #1
    Pete1996 is offline Cadillac Owners Fanatic
    Automobile(s): 1996 STS
    Join Date
    Aug 2009
    Posts
    104

    Question Big-Sert Head Repair - Can it be Done Without Removing the Engine?

    I'm interested in head repairs that can be done without removing the motor.

    I understand that the heads cannot be fitted over the studs due to clearance
    issues with the motor in the car.

    I'm wondering if the only issue with inserts such as the Big-Sert is clearance
    for the drill. Does a right angle drill solve this problem, or ....?

    I'm thinking of Big-Serts because I want to remove as much of the damaged
    block material as possible.

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    Ranger's Avatar
    Ranger is online now Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Location
    Woodstock Ill.
    Age
    66
    Posts
    72,917

    Re: Big-Sert Head Repair - Can it be Done Without Removing the Engine?

    It has been done in the car with a right angle drill, but general consensus is that it is MUCH easier to drop the drivetrain.

  4. #3
    Pete1996 is offline Cadillac Owners Fanatic
    Automobile(s): 1996 STS
    Join Date
    Aug 2009
    Posts
    104

    Re: Big-Sert Head Repair - Can it be Done Without Removing the Engine?

    Thanks Ranger, I will search the forum for some threads on it.
    I also was just reminded of Norm's inserts after doing some searches.
    Just want to use the most reliable type so Norm's might be better.

    I understand that it is easier to drop the motor - hard to understand
    but I'm sure it is true.

  5. #4
    miwise is offline Cadillac Owners Fanatic
    Automobile(s): 1999 Cadillac Seville STS
    Join Date
    Jul 2010
    Location
    Lafayette, Louisiana, United S
    Age
    36
    Posts
    448
    I pulled mine out thetop. Used a chain hoist and rigged a ratchet strap to tilt engine as it was coming out and going back in. Worked beautifully and didn't have to mess with any suspension parts brakes etc that way

  6. #5
    miwise is offline Cadillac Owners Fanatic
    Automobile(s): 1999 Cadillac Seville STS
    Join Date
    Jul 2010
    Location
    Lafayette, Louisiana, United S
    Age
    36
    Posts
    448
    Doing inside the car could be doable. might be difficult to get to the chain tensioners after u start putting it together. I'd be interested to know how u do it.

  7. #6
    Ranger's Avatar
    Ranger is online now Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Location
    Woodstock Ill.
    Age
    66
    Posts
    72,917

    Re: Big-Sert Head Repair - Can it be Done Without Removing the Engine?

    If I'm not mistaken, Mike Lawson does them in the car (haven't seen him around lately).

  8. #7
    bigtone's Avatar
    bigtone is offline Cadillac Owners Fanatic
    Automobile(s): 2010 DTS, 2006 DTS, 2001 Deville,
    Join Date
    Jun 2003
    Posts
    366

    Re: Big-Sert Head Repair - Can it be Done Without Removing the Engine?

    Quote Originally Posted by miwise View Post
    Doing inside the car could be doable. might be difficult to get to the chain tensioners after u start putting it together. I'd be interested to know how u do it.

    I've done it in the car. The chains and tensioners are accessable. There is enough room to get at everything you need to have access to. JUST enough. Do a search in the forums and you can see the write up I did on it. Not real easy, but definately doable. For me, it was the best way to do it.

  9. #8
    Pete1996 is offline Cadillac Owners Fanatic
    Automobile(s): 1996 STS
    Join Date
    Aug 2009
    Posts
    104

    Re: Big-Sert Head Repair - Can it be Done Without Removing the Engine?

    Quote Originally Posted by bigtone View Post
    I've done it in the car. The chains and tensioners are accessable. There is enough room to get at everything you need to have access to. JUST enough. Do a search in the forums and you can see the write up I did on it. Not real easy, but definately doable. For me, it was the best way to do it.
    Thanks for your reply - which inserts did you use? I've heard some negatives
    with the Time-serts but I'm hoping that is because not enough metal was taken out.

    Did you have to tilt the motor at all to do the work?

  10. #9
    stoveguyy is offline Cadillac Owners Connoisseur
    Automobile(s): 96 STS, 140k
    Join Date
    Aug 2007
    Location
    mpls mn
    Posts
    2,484

    Re: Big-Sert Head Repair - Can it be Done Without Removing the Engine?

    i took motor out the top. they say you can loosen subframe and lower the front to tilt the motor forward to get more room. the distance from rear head to firewall is tight. i have a leaky rear valve cover gasket and tried to take off rear valve cover. i cannot even slide my hand between cover and firewall. how do you get the cover off? tilt motor? don't really want to do that.

  11. #10
    bigtone's Avatar
    bigtone is offline Cadillac Owners Fanatic
    Automobile(s): 2010 DTS, 2006 DTS, 2001 Deville,
    Join Date
    Jun 2003
    Posts
    366

    Re: Big-Sert Head Repair - Can it be Done Without Removing the Engine?

    Quote Originally Posted by Pete1996 View Post
    Thanks for your reply - which inserts did you use? I've heard some negatives
    with the Time-serts but I'm hoping that is because not enough metal was taken out.

    Did you have to tilt the motor at all to do the work?
    No issues with the timeserts 2 years and 20k miles after the job. I did have good shiny metal when I drilled though. That seems to be the key. I just sold the car, but there were no issues at all with it. I did not have to tilt the engine at all to drill or install the timeserts. I pulled the motor forward to install the rear heater tubes though, using just the give in the rubber motor mounts. I removed the tubes without tilting, but I seemed to have more trouble installing them.

  12. #11
    stoveguyy is offline Cadillac Owners Connoisseur
    Automobile(s): 96 STS, 140k
    Join Date
    Aug 2007
    Location
    mpls mn
    Posts
    2,484

    Re: Big-Sert Head Repair - Can it be Done Without Removing the Engine?

    yo bigtone, going by memory here. i thought the front/rear motor mount brackets are bolted to heads? what holds motor up when heads are removed?

  13. #12
    bigtone's Avatar
    bigtone is offline Cadillac Owners Fanatic
    Automobile(s): 2010 DTS, 2006 DTS, 2001 Deville,
    Join Date
    Jun 2003
    Posts
    366

    Re: Big-Sert Head Repair - Can it be Done Without Removing the Engine?

    Quote Originally Posted by stoveguyy View Post
    yo bigtone, going by memory here. i thought the front/rear motor mount brackets are bolted to heads? what holds motor up when heads are removed?
    Those are the stabilizers that are bolted to the heads. The mounts hold the engine itself and are located down lower.

  14. #13
    stoveguyy is offline Cadillac Owners Connoisseur
    Automobile(s): 96 STS, 140k
    Join Date
    Aug 2007
    Location
    mpls mn
    Posts
    2,484

    Re: Big-Sert Head Repair - Can it be Done Without Removing the Engine?

    i have changed mounts before. so you took off the dogbones and pulled the motor forward? what did you use to pull the motor?

  15. #14
    bigtone's Avatar
    bigtone is offline Cadillac Owners Fanatic
    Automobile(s): 2010 DTS, 2006 DTS, 2001 Deville,
    Join Date
    Jun 2003
    Posts
    366

    Re: Big-Sert Head Repair - Can it be Done Without Removing the Engine?

    Quote Originally Posted by stoveguyy View Post
    i have changed mounts before. so you took off the dogbones and pulled the motor forward? what did you use to pull the motor?
    I used a comealong, from the lifting pad on the engine to the radiator support. Obviously, you dont want to pull hard enough to damage the mounts. I pulled it only as far as I could rotate the engine forward by hand, basically the comealong was just to hold it there. I got about 1/2" more clearance there, which was all I needed.

  16. #15
    Pete1996 is offline Cadillac Owners Fanatic
    Automobile(s): 1996 STS
    Join Date
    Aug 2009
    Posts
    104

    Re: Big-Sert Head Repair - Can it be Done Without Removing the Engine?

    Thanks for the tips Bigtone, good to know that you just tilt the motor forward.
    I don't think that I have the energy to do this job but if I were I'd probably use Norm's inserts, looks like he did an excellent job:
    http://www.huhnsolutions.com/NS300L_History.html

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.
If you do not want to register, fill this field only and the name will be used as user name for your post.

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

Please enter a valid email address for yourself.

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
Read about Lincoln | Buick | Kia Forte Forum
Need products for your Cadillac? Check out your options at the links below:

custom floor mats | Cadillac Chrome and Black Chrome Wheels | window tinting