1997 catera oil mixing with coolant
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 2 of 2
V6: 3.0, 3.2 LA3, 3.6 LY7, 3.6 DI LLT Discussion, 1997 catera oil mixing with coolant in Cadillac Engine Technical Discussion; I have A 1997 Catera and also have oil mixing with the water, causing a whitish brown sludge in surge ...
  1. #1
    KXDAD is offline Cadillac Owners Member
    Automobile(s): Cadillac
    Join Date
    Oct 2007
    Posts
    2

    1997 catera oil mixing with coolant

    I have A 1997 Catera and also have oil mixing with the water, causing a whitish brown sludge in surge tank and coolant system, I removed the oil cooler and the top side where lines connect showed no signs of leakage , however underside of cover showed the whitish brown sludge, not red like someone had mentioned,however I pressure checked the cooler and no leaks were found to the cooler itself(could the seals have failed) if so wouldnt I have seen oil to the top of cooler cover?)after some investigating I found out my son's mom had someone replace the heater bypass and I found they hooked up a vaccumn line that runs drivers side down by trans area to the plheumn ontop the intake, this hose is a vent and the heater bypass vac. line should have gone on this port( could this have caused the problem ?) I also pulled the radiator and pressure checked the trans cooler, thinking trans fluid was mixing with coolant, however no leaks found. I'm going to replace the t-stat. since it's right there, and do a cylinder leak down test(hopeing it's not a head gasket)anyone out there with similar problem and now corrected, please let me know,because I dont have a manual that shows belt timming, this is my only fear of removing the heads for inspection.also the car seem to over heat boiling out of the surge tank could this be the surge tank cap(defective)
    the water pump seems to circulate coolant. Thanks again

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    elvin315's Avatar
    elvin315 is online now Cadillac Owners Connoisseur
    Automobile(s): Platinum 2001 Cadillac Catera Sport
    Join Date
    Jan 2007
    Location
    Catskill, NY
    Age
    60
    Posts
    1,653

    Re: 1997 catera oil mixing with coolant

    Unfortunately this engine forum is not visited by Catera owners often. I suggest searching for past oil cooler threads in the "Catera and Cimarron Forum". You will find answers there, I guarantee. In the meantime my guess is a leaking oil cooler.

    Doubtful that the HBV is the problem since it has nothing to do with the engine oil supply. Neither does the transmission cooler. A blown head gasket is rare, contrary to most supposedly knowledgeable technicians' oppinions. They'll replace the gaskets and happily charge you for it but that won't cure the problem.

    The L81's oil cooler is a oil/coolant heat exchanger and, I hate to say, the 97-99 versions often leak. The cooler design was changed in 2000 but, though not as often, it can still leak. Live with periodic replacement or convert to a more conventional external oil/air cooler. Both topics have been discussed.

    Elvin


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