cady deville 98
#1
11-13-08, 07:15 PM
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cady deville 98
hello please help i have a 98 deville and it was working fine took it to a shop they told me the water pump was bad so i changed it then it started to heat up but not always then i changed the thermastat and still doing the same it was not heating before what can that be the radiator is less than 4 month old can the water pump be bad ?
#2
11-13-08, 07:32 PM
Caddy
Take it back to the shop that worked on it and have them properly bleed the cooling system of air bubbles/trapped air. The best meathod is to remove the heater hose in the rear and fill the coolant until the coolant comes from the heater hose.
Lenny
Lenny
#3
11-13-08, 08:12 PM
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they told me the system can not be bled i did it my self and went to the shop they told me it could not be bled it bleeds it self i dont now what else to do it was not doing it befor i changed the water pump i even changed the thermostat thinking it was that dose the water pump have to be ac delco?
#5
11-14-08, 04:44 PM
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i did the work my self but i took it to the shop first and the told me it was the water pump because it had a slow leak so i changed it and then went back and the told me there was no way to bleed the system dose any one now how to bleed the 98 cadillac northstar engine
#6
11-14-08, 09:56 PM
Member
Could try parking the car with the nose of it pointing up hill, and run the engine with the radiator cap off and see if any bubbles come out and the coolant level drops. That's how I had to bleed my car engine after I changed out the water pump.
#7
11-15-08, 04:59 AM
Group Moderator
That's my method, too, but I think that vintage Caddy lacks a radiator cap and uses a remote tank/cap. I did a quick look on AutoZone's site for the radiator and among other things it references the "secondary auxiliary coolant pump". I'm not a Caddy guy, so I'm not familiar with that system, but from your description I would be suspecting a circulation or airflow problem - pump(s), radiator, fan(s), thermostat, etc.
Any Caddy experts here today?
Any Caddy experts here today?
#8
11-15-08, 05:05 AM
I second the motion alnone gave.
Bleed he lines to the heater core.
I have in the past put in one of those tee connections for rad flushing in the heater hose at the highest point and bled that way.
Anything can get air trapped in it
Bleed he lines to the heater core.
I have in the past put in one of those tee connections for rad flushing in the heater hose at the highest point and bled that way.
Anything can get air trapped in it
#9
11-15-08, 12:36 PM
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wel thanks guys i will try that and see what happens apreciate your help i will get back with wat happens
#10
11-25-08, 02:06 PM
Not a caddy expert, although I have one, but I did change a pump on my son's Toyota and it said to bleed/prime the pump. I didn't and sure enough it ran hot. Took off the hose(top) and filled engine with cap off rad., filled hose and radiator and worked fine. Never had that problem before.(It was with front of car up hill). Try that and see what happens.
#11
11-25-08, 07:53 PM
these water pumps are tricky to seat in place. I work at a gm dealership and we have two special tools one which is a water pump socket to lock the pump in place, did u do this?. Also the way this closed system works to bleed all the air out is warm up cycles, as the car cools down it sucks coolant from the resevoir and when it runs air makes it's way to the resevoir from a bleed tube. but i would make sure the pump is properly installed and the water pump belt is ok
