Finding coolant leak...need help

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 is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Results 1 to 3 of 3
Northstar Engines and System Technical Discussion Discussion, Finding coolant leak...need help in Cadillac Engine Discussion; I have a '99 Deville that has recently been losing coolant. When I look underneath, the left side under the ...
  1. #1
    Quadrasteer is offline Cadillac Owners Fanatic
    Join Date
    Jun 2004

    Finding coolant leak...need help

    I have a '99 Deville that has recently been losing coolant. When I look underneath, the left side under the water pump is wet but the right side is wet from front to rear. Is there a way that I could pinpoint the source? It's hard to rinse it down with water in the cold temps, mabye I could bring it to a car wash and ckeck it before driving away. Also the last time that I filled the resevoir there was some foam with small bubbles in it and muck all over the cap that had never been there before.

  2. Remove Advertisements

  3. #2
    zonie77 is offline Cadillac Owners Connoisseur
    Automobile(s): 94 ETC,97 STS
    Join Date
    Sep 2003

    Re: Finding coolant leak...need help

    The bubbles and muck in the reservoir desn't sound good... Your idea of the car wash is good.

  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
    Woodstock Ill.

    Re: Finding coolant leak...need help

    The "muck" may be the sealant tabs (cooling system suppliment). Where they put in the surge tank instead of the radiator hose? Also, if the "muck" is on the cap, then I would assume the coolant is overflowing which might explain the coolant on the right side. Check the vent pipe that runs from the pump to the surge tank and make sure that entire circuit is clear. One other thought regarding the "foam". Did you use the barsleaks that looks like rabbit turds in oil? I am of the understanding that it will foam. As for the leak, all you can do is clean it up the best you can and search closely or pump the system to pressure with a pressure pump and look for the leak. If all else fails try the dye and black light trick. One other thing to check is the water pump front cover. They are known to leak and the gasket has been redesigned. Remove the intake ducting and run your fingers under the lower edge of the cover to see if they come out wet.

  5. Remove Advertisements
    Cadillac Forums

+ 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)

Your date of birth and age are displayed in several places on the forum. Only the administrator will have access to your date of birth should you choose to hide it via the privacy option below.


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.


Cadillac Posting Rules

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