Lower radiator hose cold
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 9 of 9
Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, Lower radiator hose cold in Past Cadillac Vehicle Discussion; The car is getting barely any heat and is running a little hot. The purge line is clear. The top ...
  1. #1
    txboifrozt's Avatar
    txboifrozt is offline Cadillac Owners Fanatic
    Automobile(s): 01 Deville - 98 Deville D'Elegance.
    Join Date
    Jul 2009
    Location
    Dallas, Tx
    Posts
    128

    Lower radiator hose cold

    The car is getting barely any heat and is running a little hot. The purge line is clear. The top radiator hose is warm but the lower hose is cold to the touch. Also if you let the car idle it'll cool itself down it seems like. Could it be radiator or thermostat?

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    Submariner409's Avatar
    Submariner409 is offline If it won't run, stick on fender vents
    Automobile(s): 2002.5 F55 STS/65500mi, 2004 Ford F150 SuperCab4x4
    Join Date
    Feb 2006
    Location
    MD Eastern Shore - Kent Island
    Age
    75
    Posts
    45,933

    Re: Lower radiator hose cold

    Which car ?

    Define "little hot", and that lower hose won't start to heat up until well after the thermostat begins to open at 188. Outside air temperature ??? and do you have decent heat in the cabin ?? In cold weather that cabin heater will do a good job of cooling the engine all by itself. If the car is sitting there, idling from cold, then it's doubtful that any meaningful conclusions can be drawn - check stuff after at least 10 miles of driving.

  4. #3
    txboifrozt's Avatar
    txboifrozt is offline Cadillac Owners Fanatic
    Automobile(s): 01 Deville - 98 Deville D'Elegance.
    Join Date
    Jul 2009
    Location
    Dallas, Tx
    Posts
    128
    Thread Starter
    01 Deville. The temperature is going above the half mark. There's little to no heat in the cabin with it all the way up on full blast. Shouldn't the thermostat open at the half mark? So the hose shouldn't be real cold if the thermostat is open. The hose from the thermostat to the firewall is also cold. The thermostat was changed last month with the water pump. The thermostat is aftermarket, maybe it's not opening?

  5. #4
    Submariner409's Avatar
    Submariner409 is offline If it won't run, stick on fender vents
    Automobile(s): 2002.5 F55 STS/65500mi, 2004 Ford F150 SuperCab4x4
    Join Date
    Feb 2006
    Location
    MD Eastern Shore - Kent Island
    Age
    75
    Posts
    45,933

    Re: Lower radiator hose cold

    If the thermostat was not opening you should have PLENTY of cabin heat. I'll bet the heater circuit is clogged or airbound.

    The gauge is supposed to move. Ever seen this ???

  6. #5
    txboifrozt's Avatar
    txboifrozt is offline Cadillac Owners Fanatic
    Automobile(s): 01 Deville - 98 Deville D'Elegance.
    Join Date
    Jul 2009
    Location
    Dallas, Tx
    Posts
    128
    Thread Starter
    You suggest to remove the heater hoses and check for blockage?

  7. #6
    basscatt's Avatar
    basscatt is offline Cadillac Owners 10000+ Posts
    Automobile(s): 89 Coupe DeVille, 95 Sedan DeVille, 03 SLS, two 02 DHS's
    Join Date
    Feb 2004
    Location
    Minnesota
    Age
    63
    Posts
    10,507

    Re: Lower radiator hose cold

    Quote Originally Posted by txboifrozt View Post
    You suggest to remove the heater hoses and check for blockage?
    --------------------------
    check the coolant level -

    the serge tank should be about 1/2 full -

  8. #7
    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
    74,755

    Re: Lower radiator hose cold

    Quote Originally Posted by txboifrozt View Post
    The purge line is clear.
    Is it flowing coolant?

    I assume that the WP belt is intact and spinning?

  9. #8
    txboifrozt's Avatar
    txboifrozt is offline Cadillac Owners Fanatic
    Automobile(s): 01 Deville - 98 Deville D'Elegance.
    Join Date
    Jul 2009
    Location
    Dallas, Tx
    Posts
    128
    Thread Starter
    At the purge line, coolant barely flows at normal idle. If I raise the idle then it flows more. Should it be flowing thoroughly even at normal idle?

  10. #9
    maeng9981's Avatar
    maeng9981 is offline Cadillac Owners Connoisseur
    Automobile(s): 14 SRX, 12 Sierra, 00 SLS, 99 Deville 50-year Anniversary
    Join Date
    Mar 2009
    Location
    Dallas, TX
    Age
    23
    Posts
    3,288

    Re: Lower radiator hose cold

    If purge line is flowing coolant, then it's good. The flow rate will raise as the rpm raises (the water pump spins faster). If it's sputtering air, then it means you have air trapped in the system and the cooling system is purging.

    Assuming that your 01 is a base model, you most likely have the digital dash, which is even more damped, the middle (4/8) indicates 187F-235F.

    Make sure you installed the thermostat correctly (not in backwards), with the hole at 12:00. Did your new thermostat look similar to the old one?

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