Cadillac: 1997 Cadillac STS overheating

"Sinerviz" <com> wrote
 

I don't have an answer, as such, but I have a question that might point you
in the right direction.

On a system like that, where the pressure cap is on the overflow bottle
instead of the top of the radiator, how does one go about getting the system
FULL.......that is, get all of the air bled out?

I don't know the answer. If you don't either, I'm guessing you didn't get
the system anywhere near full and the apparent loss of coolant is really
just trapped air finally making it's way to the overflow bottle.

 

Hi,
maybe, there is still some air in your system. put the car on a really steep
slope with front side uphill
(safety measures strongly recommended (;-),
open the radiator cap, let the engine run, squeeze all the hoses, then fill
in some more coolant.
Should be OK then.
Andreas

Ken Abrams wrote: 

Well, from what I was told, if you fill the system really slow, most of
the air should work it's way up as you fill it up. Now, when I was
filling it up, I only got two 3.78 litre bottles of fluid in there and
the system is supposed to take over 11 litres... I thought perhaps
there was just some fluid left in the engine that didn't get drained
when I disconnected the hoses. Now that I think about it, 4 litres of
fluid is a lot to be trapped in the engine when both hoses are
disconnected, so perhaps there was a lot of air still trapped. I can't
figure out where there is no air vent that I can use to let any air
out... there is supposedly a hose that goes into the overflow bottle
that is supposed to vent air, but it's not something I can open and
close manually so its tough to control. Anyhow, maybe I will just keep
filling it up for a bit and see if it stops going down. I will take
the advice of another user who suggested running the car while parked
on a steep hill, maybe this will help get air out.

Thanks very much! Will update if this works in case others run into
this problem.

Well, the caddy is no longer overheating, however in a 20-25 minute
drive on the highway, to and from work each day is leaving me with
about a 1 litre (1 quart) of coolant that is disappearing. I still
dont see any signs of coolant leaking anywhere, and surely it can't
just be air still working its way out... I have added more than the
systems capacity since the original fill-up.

Any ideas as to where I would look for the possible cause of the
coolant dropping like this?

Thanks
Kevin

On 21 Dec 2006 21:35:57 -0800, "Sinerviz" <com>
wrote:
 
You have a few possibilities. Check the pressure cap and the line
running to the coolant recovery tank. Pressurize the system and look
for leaks. Finally, consider the possibility of head gasket failure. A
leakdown test would confirm this.

Merry Christmas Nicky:

I agree with you about the leak-down test. The dyed fluid shoud be
able to substantiate the location of the leak. It is possible that a
pin hole in one of the replaced hoses may be the source of the leak.
That was the cause of the loss of coolant in from my 1995 STS. My
technician located the source of the leak, and then replaced the faulty
hose. Mission accomplished.

I hope that the head gasket is not the problem, since it is very
expensive for a shop to repair, or labor intensive (sp) for Kevin and a
buddy to replace.

Peace be with you during the holidays,

Famous

NickySantoro wrote: 

Merry Christmas Nicky:

I agree with you about the leak-down test. The dyed fluid shoud be
able to substantiate the location of the leak. It is possible that a
pin hole in one of the replaced hoses may be the source of the leak.
That was the cause of the loss of coolant in from my 1995 STS. My
technician located the source of the leak, and then replaced the faulty
hose. Mission accomplished.

I hope that the head gasket is not the problem, since it is very
expensive for a shop to repair, or labor intensive (sp) for Kevin and a
buddy to replace.

Peace be with you during the holidays,

Famous

NickySantoro wrote: 

Sinerviz wrote: