1998 Eldorado Head Gasket - 2nd time in 375-days
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 11 of 11
Northstar Engines and System Technical Discussion Discussion, 1998 Eldorado Head Gasket - 2nd time in 375-days in Cadillac Engine Technical Discussion; On December 15, 2007, I paid for a Head Gasket repair, bolts drilled out and Heli-bolts added and an engine ...
  1. #1
    drsyn67 is offline Cadillac Owners Member
    Automobile(s): Eldorado
    Join Date
    Apr 2009
    Posts
    4

    1998 Eldorado Head Gasket - 2nd time in 375-days

    On December 15, 2007, I paid for a Head Gasket repair, bolts drilled out and Heli-bolts added and an engine reseal at my local Cadillac dealership. On December 26, 2008, the engine overheated and I was told by a different mechanic that the HG had blown again. (NOTE: The digital display never stated "Engine Overheated" - when I realized the car was getting hot I put it in Neutral and shut off the engine before the thermo hit the red). The mechanic is someone my family has trusted with other GM cars for 30 years. I had used him for oil/lube/filter due to the convenience of his location, but generally relied on the dealership. The car was serviced five times between the original repair and 2nd incident (3 times at the dealership / 2 times @ mechanic - a total of 12,000 miles were completed between the dates mentioned) The mechanic is close to my home, and so was the incident, so it was towed to him (the dealership is 25 miles from where it happened).

    The mechanic identified that the HG failure was on the coolant side, and not the oil side, and thus, when running the exhaust drips water and pale exhaust from the muffler.

    All this said to ask three simple questions (but supply you, the experts, with the details):

    1. Will K & W Block Seal successfully "bandage" the problem, and possibly provide me with additional miles of enjoyment? I will not spend another $3500 on the car, so it is off to the graveyard if this is not an option.

    2. Has ANYONE had success with the K&W product on their Caddy?

    3. Where is the radiator drain seal? I've read thru hundreds of posts of other models, but haven't found one that addresses my model (not the ETC).

    I enjoy the car and do not mind continued service at the dealership (my wife works near it now, so servicing it is convenient).

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    mikelawson is offline Cadillac Owners Fanatic
    Automobile(s): Cadillac
    Join Date
    Apr 2008
    Posts
    123

    Re: 1998 Eldorado Head Gasket - 2nd time in 375-days

    That's way too high for replacement. I could fix it the right way for almost half that with a real warranty.

    Mike

  4. #3
    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
    66
    Posts
    74,053

    Re: 1998 Eldorado Head Gasket - 2nd time in 375-days

    No. Repairs in a bottle will not work.

    When you said "Heli-bolts" I assume you meant Timeserts and not Heli-Coils.

  5. #4
    AJxtcman's Avatar
    AJxtcman is offline Cadillac Owners Connoisseur
    Automobile(s): The Northstar Tuner
    Join Date
    Apr 2007
    Location
    Rock Hill SC
    Age
    46
    Posts
    2,754

    Re: 1998 Eldorado Head Gasket - 2nd time in 375-days

    Quote Originally Posted by drsyn67 View Post
    On December 15, 2007, I paid for a Head Gasket repair, bolts drilled out and Heli-bolts added and an engine reseal at my local Cadillac dealership. On December 26, 2008, the engine overheated and I was told by a different mechanic that the HG had blown again. (NOTE: The digital display never stated "Engine Overheated" - when I realized the car was getting hot I put it in Neutral and shut off the engine before the thermo hit the red). The mechanic is someone my family has trusted with other GM cars for 30 years. I had used him for oil/lube/filter due to the convenience of his location, but generally relied on the dealership. The car was serviced five times between the original repair and 2nd incident (3 times at the dealership / 2 times @ mechanic - a total of 12,000 miles were completed between the dates mentioned) The mechanic is close to my home, and so was the incident, so it was towed to him (the dealership is 25 miles from where it happened).

    The mechanic identified that the HG failure was on the coolant side, and not the oil side, and thus, when running the exhaust drips water and pale exhaust from the muffler.

    All this said to ask three simple questions (but supply you, the experts, with the details):

    1. Will K & W Block Seal successfully "bandage" the problem, and possibly provide me with additional miles of enjoyment? I will not spend another $3500 on the car, so it is off to the graveyard if this is not an option.

    2. Has ANYONE had success with the K&W product on their Caddy?

    3. Where is the radiator drain seal? I've read thru hundreds of posts of other models, but haven't found one that addresses my model (not the ETC).

    I enjoy the car and do not mind continued service at the dealership (my wife works near it now, so servicing it is convenient).
    Not every Tech is the same. I personally spend a lot of time inspecting the bolt holes. If they are junk you can't fix them. If the Tech just drilled them out and installed the inserts he may have missed a NON repairable block.

    I just did a head gasket job on a dreaded 97. 2 of the holes needed the Big Serts after inspecting the holes for cavities after I drilled them for the regular inserts.
    You also have to know what you are looking for.

    Look at it this way. Was the block junk a year ago?

  6. #5
    32vmonte is offline Cadillac Owners Member
    Automobile(s): none
    Join Date
    Mar 2009
    Posts
    98

    Re: 1998 Eldorado Head Gasket - 2nd time in 375-days

    Quote Originally Posted by AJxtcman View Post
    Not every Tech is the same. I personally spend a lot of time inspecting the bolt holes. If they are junk you can't fix them. If the Tech just drilled them out and installed the inserts he may have missed a NON repairable block.

    I just did a head gasket job on a dreaded 97. 2 of the holes needed the Big Serts after inspecting the holes for cavities after I drilled them for the regular inserts.
    You also have to know what you are looking for.

    Look at it this way. Was the block junk a year ago?
    Question, if the block is junk for timeserts will the studs still work?

  7. #6
    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
    66
    Posts
    74,053

    Re: 1998 Eldorado Head Gasket - 2nd time in 375-days

    Nope.

  8. #7
    AJxtcman's Avatar
    AJxtcman is offline Cadillac Owners Connoisseur
    Automobile(s): The Northstar Tuner
    Join Date
    Apr 2007
    Location
    Rock Hill SC
    Age
    46
    Posts
    2,754

    Re: 1998 Eldorado Head Gasket - 2nd time in 375-days

    Quote Originally Posted by 32vmonte View Post
    Question, if the block is junk for timeserts will the studs still work?
    I will get back to you on this

  9. #8
    97EldoCoupe's Avatar
    97EldoCoupe is offline U.S. Patent #8,740,532 - www.studkit.com
    Automobile(s): 97 ETC, 04 Bonneville GXP, 2010 Sierra SLT crew cab /4x4
    Join Date
    Mar 2007
    Location
    London, Ontario
    Age
    28
    Posts
    2,497

    Re: 1998 Eldorado Head Gasket - 2nd time in 375-days

    Yes the studs will work. The studs utilize the top and middle portion of the holes instead of the very bottom, and enlarge the hole past what timeserts would. As I've said- there is not one block yet that I could not use. I've seen some pretty rough blocks, but all of them had clean, shiny threads when I was finished with them. I'm backing those blocks with a 2 year warranty against HGs failing or studs pulling, and I would not do this if I questioned the grip of the stud.


    Need parts for your Northstar Engine? www.northstarperformance.com

    Jake Wiebe, developer of the SureGrip™ Cylinder Head Stud Kit

  10. #9
    97EldoCoupe's Avatar
    97EldoCoupe is offline U.S. Patent #8,740,532 - www.studkit.com
    Automobile(s): 97 ETC, 04 Bonneville GXP, 2010 Sierra SLT crew cab /4x4
    Join Date
    Mar 2007
    Location
    London, Ontario
    Age
    28
    Posts
    2,497

    Re: 1998 Eldorado Head Gasket - 2nd time in 375-days

    The studs work even after the original size timeserts, and the _orms serts (providing those inserts can be removed) but I don't know about big-serts. I will find out.


    Need parts for your Northstar Engine? www.northstarperformance.com

    Jake Wiebe, developer of the SureGrip™ Cylinder Head Stud Kit

  11. #10
    AJxtcman's Avatar
    AJxtcman is offline Cadillac Owners Connoisseur
    Automobile(s): The Northstar Tuner
    Join Date
    Apr 2007
    Location
    Rock Hill SC
    Age
    46
    Posts
    2,754

    Re: 1998 Eldorado Head Gasket - 2nd time in 375-days

    Hey guys I have some new info

    OK the OD of the stock bolt looks to be 11mm +-.1mm
    The OD of the NORMAL TimeSert used is 12.63mm +- .1mm
    The thing is you need to look at the OD of the small/inner part of the treads
    This is 11.61 +- .1

    OK The Maximum size of the OE threads in the block have to be just over 11mm. The Smallest ID of the threads to install the TimeSert needs to be about 11.6 to 11.65. That leave only .6mm that you can drill out and still tap. I reality you can only remove .6mm and this must clean up the bolt hole to be free of defects.

    The BigSert has has an OD of 15.70 +- .2mm and the inner part of the threads is 14.8 +- .2.
    Hmmmm 14.8 - 11 = 3.8mm and that may not clean up the block.

    So Jake what is the OD's of your studs?

  12. #11
    97EldoCoupe's Avatar
    97EldoCoupe is offline U.S. Patent #8,740,532 - www.studkit.com
    Automobile(s): 97 ETC, 04 Bonneville GXP, 2010 Sierra SLT crew cab /4x4
    Join Date
    Mar 2007
    Location
    London, Ontario
    Age
    28
    Posts
    2,497

    Re: 1998 Eldorado Head Gasket - 2nd time in 375-days

    AJ the OD of the studs is 15.87mm. The ID of the hole that I drill 13.49mm.

    Seems to me that the studs may not work after a bigsert repair. AJ if you have a spare bigsert kicking around send one to me I want to do some testing on an old block.


    Need parts for your Northstar Engine? www.northstarperformance.com

    Jake Wiebe, developer of the SureGrip™ Cylinder Head Stud Kit

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