Automotive Forums .com - the leading automotive community online! Automotive Forums .com - the leading automotive community online!
Automotive Forums .com - the leading automotive community online! 
-
Latest | 0 Rplys
Go Back   Automotive Forums .com Car Chat > Cadillac > General Discussion
Reply Show Printable Version Show Printable Version | Email this Page Email this Page | Subscription Subscribe to this Thread
 
Thread Tools
Old 08-12-2005, 05:05 PM   #1
DeVille
AF Newbie
 
Join Date: Aug 2005
Location: Cleveland, Ohio
Posts: 12
Thanks: 0
Thanked 0 Times in 0 Posts
Overheated Cadillac DeVille

have a 1987 DeVille w/4100 block and it ran hot. I have since changed the water pump and noticed that there is water seeping from right below the carborator. I do not believe that the water pump created the problem. Is there anyone that knows what might have created this problem, and what has to be done to repair the leak?
DeVille is offline   Reply With Quote
Old 08-15-2005, 09:37 AM   #2
ctesla
AF Enthusiast
 
ctesla's Avatar
 
Join Date: Feb 2005
Location: guffey, Colorado
Posts: 668
Thanks: 27
Thanked 30 Times in 30 Posts
I do not believe the water pump created this problem either; however, the antifreeze is "puddled" on the manifold under the carb...
where is it from? is there just a hose connection that is loose maybe?
or is there a PVS (ported vacuum switch) that has a cracked fitting?
or maybe the thermostat housing (when it overheated) cracked, or broke a seam or seal?
I would be more than happy to assist (and I think others would be too), however, you need to help us, help you...
explain the vehicle, mileage, what ocurred during overheating (and how long, 10 minutes up past H, or needle rose to H and you shut it off),
explain in detail (if you can) where it "looks" like the antifreeze could be coming from under the carb (we can't be there to see it); was the water pump leaking after over heat??? if so, maybe the puddle on the manifold is just spray from the water pump under the hood--- is there any antifreeze ON the underside of the hood?

I do not think no one answered your question for not wanting to help, but because they (like me) are unsure where the antifreeze came from.
plus it does sometimes take enough people to see the post prior to responding.
ctesla is offline   Reply With Quote
Old 08-15-2005, 09:41 AM   #3
ctesla
AF Enthusiast
 
ctesla's Avatar
 
Join Date: Feb 2005
Location: guffey, Colorado
Posts: 668
Thanks: 27
Thanked 30 Times in 30 Posts
Re: Overheated Cadillac DeVille

Quote:
Originally Posted by DeVille
have a 1987 DeVille w/4100 block and it ran hot. I have since changed the water pump and noticed that there is water seeping from right below the carborator. I do not believe that the water pump created the problem. Is there anyone that knows what might have created this problem, and what has to be done to repair the leak?
when you say "seeping";
is it coming right from where the carb bolts to manifold?
if so, loosen the carb's four bolts just enough to lift the carb up a little and break the seal with the engine...
did the antifreeze pour from here?
if so, you have water up through the runners of your intake manifold, and that means in your valves, and on top of the pistons as well;
if this is the case, the overheating was critical:
time to pull heads.
sorry.
ctesla is offline   Reply With Quote
Old 08-15-2005, 04:17 PM   #4
DeVille
AF Newbie
Thread starter
 
Join Date: Aug 2005
Location: Cleveland, Ohio
Posts: 12
Thanks: 0
Thanked 0 Times in 0 Posts
Thank you all so much for responding to my questions. The car overheated for about 15 min. The water pump was not leaking. I am going to take a closer look at the parts that you suggested and tell you what I see. When I replaced the water pump I allowed the engine to run about 10 min., until I saw the antifreeze leaking from underneath the car. Then I turned the moter off so that I could investigate the leak. It was then that I noticed antifreeze squirting from close to the carb, and the thermostat housing. But it looked to me at the time that it was squirting from where there might be a gasket on the head. Then I removed the radiator cap and refilled the radiator and started the engine w/out replacing the radiator cap. After about 5 or 10 minutes, antifreeze started gushing from the radiator. I have had cars running in the past w/out the cap on before and never have I seen fluid gush out like that. Could there be something clogged, or what should my next step be?
DeVille is offline   Reply With Quote
Old 08-15-2005, 04:19 PM   #5
DeVille
AF Newbie
Thread starter
 
Join Date: Aug 2005
Location: Cleveland, Ohio
Posts: 12
Thanks: 0
Thanked 0 Times in 0 Posts
Re: Overheated Cadillac DeVille

The engine has 33,000 original miles on it
DeVille is offline   Reply With Quote
Old 08-15-2005, 04:35 PM   #6
Ryan066
AF Regular
 
Join Date: Apr 2005
Location: Dartmouth
Posts: 192
Thanks: 0
Thanked 0 Times in 0 Posts
Re: Re: Overheated Cadillac DeVille

Quote:
Originally Posted by DeVille
The engine has 33,000 original miles on it
prolly a plugged rad, try draining a water hose through it to see if water comes out the bottom.

after further reading .. it sounds like to me the rad got clogged.. stopped flow of coolant... overheat... and now the HG is blown and coolant is leaking around the head... and prolly a warped head now.

is the oil milky colored?
Ryan066 is offline   Reply With Quote
Old 08-15-2005, 06:16 PM   #7
DeVille
AF Newbie
Thread starter
 
Join Date: Aug 2005
Location: Cleveland, Ohio
Posts: 12
Thanks: 0
Thanked 0 Times in 0 Posts
Re: Overheated Cadillac DeVille

do you think a new head or just have the existing one machined?
DeVille is offline   Reply With Quote
Old 08-15-2005, 07:46 PM   #8
ctesla
AF Enthusiast
 
ctesla's Avatar
 
Join Date: Feb 2005
Location: guffey, Colorado
Posts: 668
Thanks: 27
Thanked 30 Times in 30 Posts
Re: Re: Overheated Cadillac DeVille

Quote:
Originally Posted by DeVille
do you think a new head or just have the existing one machined?
as ryan suggested, it might be just a clogged rad.
but it could be heads... 33K original, might not be heads, if this has sat or had very limited use:
1987 form 33K= 1830+ miles in ONE YEAR! most cars do that in a month!
it could be the radiator core has slowly built up a deposit to clog the hoses and coolant flow.
check that first, and also pull the thermostat (if you are not sure if that spray was coming from it), you can put in a new t-stat, and take a look inside to see what it looks like. if their is large deposits (or sludge, like someone used BarDahl or AlumaSeal stop leak products, it might just be clogging the heater core) stopping flow and creating an overpressure.
until you isolate problem, use water:
cheaper and environmentally friendly.
ctesla is offline   Reply With Quote
Old 08-16-2005, 03:48 PM   #9
Ryan066
AF Regular
 
Join Date: Apr 2005
Location: Dartmouth
Posts: 192
Thanks: 0
Thanked 0 Times in 0 Posts
Re: Re: Overheated Cadillac DeVille

Quote:
Originally Posted by DeVille
do you think a new head or just have the existing one machined?
if the head is warped they can be machined, yes.

but i would do alot more investigation before ripping the head(s) off. do what like ctesla said.

an engine compression and pressure test of the cooling system would prolly do you good.
Ryan066 is offline   Reply With Quote
Old 08-30-2005, 09:07 AM   #10
DeVille
AF Newbie
Thread starter
 
Join Date: Aug 2005
Location: Cleveland, Ohio
Posts: 12
Thanks: 0
Thanked 0 Times in 0 Posts
Re: Overheated Cadillac DeVille

I took a picture of the leak and it is in the gallery
DeVille is offline   Reply With Quote
Old 08-30-2005, 09:21 AM   #11
DeVille
AF Newbie
Thread starter
 
Join Date: Aug 2005
Location: Cleveland, Ohio
Posts: 12
Thanks: 0
Thanked 0 Times in 0 Posts
Heres a link to the photo

DeVille is offline   Reply With Quote
Old 08-30-2005, 10:02 AM   #12
DeVille
AF Newbie
Thread starter
 
Join Date: Aug 2005
Location: Cleveland, Ohio
Posts: 12
Thanks: 0
Thanked 0 Times in 0 Posts
Re: Overheated Cadillac DeVille

Sorry link didn't work
DeVille is offline   Reply With Quote
Old 10-11-2005, 08:48 PM   #13
DeVille
AF Newbie
Thread starter
 
Join Date: Aug 2005
Location: Cleveland, Ohio
Posts: 12
Thanks: 0
Thanked 0 Times in 0 Posts
Re: Overheated Cadillac DeVille

Where would be the best place to find a new head for this car?
DeVille is offline   Reply With Quote
Old 11-02-2005, 10:23 PM   #14
creeker
AF Newbie
 
Join Date: Oct 2005
Location: roberts creek
Posts: 32
Thanks: 0
Thanked 0 Times in 0 Posts
Re: Re: Overheated Cadillac DeVille

Quote:
Originally Posted by DeVille
Where would be the best place to find a new head for this car?
I used to have a 1992 caddy with a 4.9, like the 4.1 it has alum. block and cast cylinder sleeves and cast head, after any cooling system work you have to put in these felt material tablets (a g.m. product) in the rad. they break up and seek out and fill any voids between cast iron and aluminum. kinda like a crack filler.
creeker is offline   Reply With Quote
 
Reply

POST REPLY TO THIS THREAD

Go Back   Automotive Forums .com Car Chat > Cadillac > General Discussion

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 11:55 AM.

Community Participation Guidelines | How to use your User Control Panel

Powered by: vBulletin | Copyright Jelsoft Enterprises Ltd.
 
 
no new posts