Jump to content
CaddyInfo Cadillac Forum

coolant leak


scramblersts

Recommended Posts

Hello, I am trying to figure out how to get to a coolant leak on my 97 Seville STS. the leak is comming from the pasanger side of the car where there is a cover over the AC. I can not figure how to get the cover off to locate the leak because the motor is right up against it. It almost appears as if the motor has to be droped or moved forward to be able to get to this cover. Any help on this would be appreciated.

thanks B)

Link to comment
Share on other sites


Hello, I am trying to figure out how to get to a coolant leak on my 97 Seville STS. the leak is comming from the pasanger side of the car where there is a cover over the AC. I can not figure how to get the cover off to locate the leak because the motor is right up against it. It almost appears as if the motor has to be droped or moved forward to be able to get to this cover. Any help on this would be appreciated.

thanks B)

Take a photo of the area, this is too vague. Dont know what cover you are referring to. There is an inspection cover in the wheel well that gives a good view of the area. Are you talking about the AC compressor? Does your car have Alternator cooling by the cooling system? Check the tank and hoses around the tank for leaking and check the radiator end tanks and upper radiator hose

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

Link to comment
Share on other sites

The HVAC housing on the firewall? If that's it, it must be the heater core and that usually leaks in the cabin. If it is under the hood, it's not the core.

Good Ranger, I didnt get what he was referring to. Could be hoses also or the heater pipes spraying coolant

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

Link to comment
Share on other sites

Yes Ranger thank you it is the HAVC housing on the firewall. There is no leak in the cabin but what I can see from under the car is it leaking from behind that HAVC cover. Also when this first happened I did have some smoke come through the vents in the cabin. I think it may be a hose but cant tell for sure. I just cant remove that cover to see exactly what is leaking. Thanks for any information B)

Edited by scramblersts
Link to comment
Share on other sites

can anyone give me some information on how to proceed? thanks

The best way is to pressurize the cooling system and see where the leak is coming from. If you dont have the equipment to do so, find a radiator shop that can pressurize your cooling system to find the leak.

The cooling system on these cars is sophistocated and it can leak from:

Heater Core

Coolant tank

Hoses

Heater Pipes

Radiator

Radiator end tanks

Crossover

Green Hoses

Water Pump

Head Gaskets can leak externally

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

Link to comment
Share on other sites

Link to comment
Share on other sites

well unfortunately it will not hold enough antifreez to get it to the shop. so I need to try and get to the leak somehow. I have done a serch and read one post about having to tilt the motor forward, is there an easy way to do this? A little on the car it is a 97 with 210000 miles and this is the first major problem I have had with it. It still runns great so I would like to try and fix this problem without to much $$. Thanks

Edited by scramblersts
Link to comment
Share on other sites

well unfortunately it will not hold enough antifreez to get it to the shop. so I need to try and get to the leak somehow. I have done a serch and read one post about having to tilt the motor forward, is there an easy way to do this? A little on the car it is a 97 with 210000 miles and this is the first major problem I have had with it. It still runns great so I would like to try and fix this problem without to much $$. Thanks

The heater core is replaced from under the dash there is an inspection cover, it does not get removed from under the hood. Maybe one of your main hard lines to the heater core broke off

Here is a tip, to eliminate the heater core from the circuit, take both hoses off and connect them together with a pipe, fitting and clamps

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

Link to comment
Share on other sites

BodybyFisher you are a Rock Star. So I Finally had the time to go through this and find the problem. Since no one usually rides on the pasanger side I had not noticed the coolant leaking into the cabin. I just knew that every couple days it needed coolant what I did find it was leaking down the fire wall behind the HVAC cover. The core was cracked near where the two hoses connect and was leaking out the hole where they come in through the fire wall and some in the cabin. So in checking the heater core suprise ther it was.

A simple glove box removal the cover under the dash and I could get to it. Replaced the core and it runs just fine now. Then I had to deal with the mess of cleaning up the carpet from the leak. Thanks again for the advice you knew exactly where to start. :lol::lol::D

Link to comment
Share on other sites

BodybyFisher you are a Rock Star. So I Finally had the time to go through this and find the problem. Since no one usually rides on the pasanger side I had not noticed the coolant leaking into the cabin. I just knew that every couple days it needed coolant what I did find it was leaking down the fire wall behind the HVAC cover. The core was cracked near where the two hoses connect and was leaking out the hole where they come in through the fire wall and some in the cabin. So in checking the heater core suprise ther it was.

A simple glove box removal the cover under the dash and I could get to it. Replaced the core and it runs just fine now. Then I had to deal with the mess of cleaning up the carpet from the leak. Thanks again for the advice you knew exactly where to start. :lol::lol::D

Hey glad to help. Consider joining Caddyinfo as a supporting member, as you can see, the minimal annual membership fee is well worth what we can do for you and you will be supporting this terrific resource! Glad you got it fixed, Mike

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...