Go Back   Cadillac Forum - Enthusiast forums for Cadillac Owners > General Technical Section > General Tech
Sign in using an external account
Register Forgot Password?
Search

Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 04-15-2010, 11:44 PM
Junior Member
 
Join Date: Apr 2010
Posts: 2
Default HELP!!!!!!!!!!!!! the coolant in my 03 deville keeps disapearing

hi i have a 2003 deville i have filled up the coolant numerous times and my coolant keeps disapearing i can smell antifreeze in engine compartment but cant find a leak anybody know what could be causing that? a guy told me to get rid of it because its gonna cost me $6000 to fix it somebody please help just bought the car
Reply With Quote
  #2  
Old 04-16-2010, 01:31 PM
Senior Member
 
Join Date: Apr 2009
Location: Seattle Area
Posts: 108
Default Coolant Leak

I had the same problem with my 01 Seville when I bought it. There was a slow leak; I could smell the fluid from the engine compartment, but not from the exhaust pipe; and, like yours, there was no obvious drip.

What worked for me was to flush the radiator, add new Prestone Dex-Cool antifreeze coolant at a 50% ratio with clean water, and the most important part: follow the Cadillac service manual instructions and add three cooling system seal tabs GM part number 3634621 to the lower radiator hose. They are brown discs about an inch in diameter, 3/4" tall, and you can put them in whole.

I understand that other manufacturers make a similar vegetable based product. The GM packaged product includes 6 tabs with a net weight of 2.12 oz and contains: Ginger, Almond Shell, Sodium Carbonate-CAS #497-19-8, 1,6-Heptadiene-3,5-dione, 1,7-Bis(4-hydroxy-3-methoxyphenyl)-CAS #458-37-7.

Last edited by 2001_Seville_SLS; 04-16-2010 at 01:42 PM.
Reply With Quote
  #3  
Old 04-17-2010, 09:46 AM
slowroll's Avatar
Tech Certified Members
 
Join Date: Oct 2007
Location: Mid Atlantic
Posts: 2,505
Default

Water pump housing / crossover to block gaskets are a common cause of the "mystery" leak. You will likely need to get car high off the ground to find leak. Many shops will do pressure test for coolant leaks for under 30.00.
__________________
It will be OK
Reply With Quote
  #4  
Old 04-17-2010, 11:31 PM
Junior Member
 
Join Date: Apr 2010
Posts: 2
Default

thanks guys you are awsome im gonna get it preassure tested then im gonna get the tabs and fix the leak if its a seal or whatever it is . i appresiate the sugestions once again thank you
Reply With Quote
  #5  
Old 04-22-2010, 10:33 AM
Junior Member
 
Join Date: Mar 2010
Posts: 5
Default

On the tab thing, local Dealer told me they do not use the tabs anymore on late model caddys. Anyone else hear this?
Reply With Quote
  #6  
Old 04-22-2010, 06:05 PM
slowroll's Avatar
Tech Certified Members
 
Join Date: Oct 2007
Location: Mid Atlantic
Posts: 2,505
Default

I have not heard that, 2 tabs for all but 4.1-4.9L (push rod engine) which is 6. NO TABS FOR DIESEL! Info out years ago was anytime coolant is drained tabs should be added to seal minor leaks and extend water pump life.
__________________
It will be OK
Reply With Quote
  #7  
Old 04-22-2010, 08:01 PM
Senior Member
 
Join Date: Apr 2009
Location: Seattle Area
Posts: 108
Default Coolant Tabs

The 2001 Seville SLS and STS factory service manual calls for DEX-COOL and three pellets of the engine coolant supplement in the lower radiator hose when changing coolant. Changing the fluid and adding the pellets stopped the leak on my car.

Last edited by 2001_Seville_SLS; 04-22-2010 at 08:03 PM.
Reply With Quote
  #8  
Old 11-08-2010, 12:36 PM
Junior Member
 
Join Date: Nov 2010
Location: Central California
Posts: 3
Default Coolant pellets

Hi all, I just replaced the radiator in my 91 Deville 4.9l and didn't know about these "pellets" that are to be placed in the lower hose. My daughter drove the car approx 100 mi and it leaked like a sieve...her mother was with her and fortunately knew not to let it overheat...long story short, they got it home after stopping and refilling the radiator a few times but her father said it's leaking from the freeze plugs which I have not confirmed. My question is, how many pellets do I need and do I have to go to a Cad dealer to get them? Also, is there a special antifreeze that needs to be used also? Thanks in advance! Darren
Reply With Quote
  #9  
Old 11-09-2010, 10:29 AM
stomper's Avatar
Tech Certified Members
 
Join Date: Jun 2007
Posts: 2,704
Default

Quote:
Originally Posted by dark_dz View Post
Hi all, I just replaced the radiator in my 91 Deville 4.9l and didn't know about these "pellets" that are to be placed in the lower hose. My daughter drove the car approx 100 mi and it leaked like a sieve...her mother was with her and fortunately knew not to let it overheat...long story short, they got it home after stopping and refilling the radiator a few times but her father said it's leaking from the freeze plugs which I have not confirmed. My question is, how many pellets do I need and do I have to go to a Cad dealer to get them? Also, is there a special antifreeze that needs to be used also? Thanks in advance! Darren
that is a different problem .. have your cooling system checked.
the pellets are not meant to stop leakage of such proportions.


.
__________________
"If you're going through hell, keep going"
~ Winston Churchill


Reply With Quote
  #10  
Old 11-09-2010, 03:43 PM
Junior Member
 
Join Date: Nov 2010
Location: Central California
Posts: 3
Default

Heya Stomper, thanks for the timely reply, muy appreciated...I haven't had a chance to look at it yet, but one thing I know from having been married to that gal for nearly 20 years is she has occasion to participate in hyperbole but certainly if it IS leaking that much...I will be having it checked-out by a mechanic...thanks again!
Reply With Quote
Old 11-09-2010, 03:43 PM
 
 
 
Reply



Tags
2000, 2003, 3634621, cad, cadillac, coolant, cooling, crossover, deville, gm, number, part, put, radiator, seal, system, tabs


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Advertising

Featured Sponsors
Vendor Directory
Our Sponsors
All times are GMT -5. The time now is 07:43 AM.

Internet Brands, Inc.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.