scramblersts Posted September 14, 2009 Report Share Posted September 14, 2009 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 Link to comment Share on other sites More sharing options...
BodybyFisher Posted September 14, 2009 Report Share Posted September 14, 2009 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 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 More sharing options...
Ranger Posted September 14, 2009 Report Share Posted September 14, 2009 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. Link to comment Share on other sites More sharing options...
BodybyFisher Posted September 14, 2009 Report Share Posted September 14, 2009 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 More sharing options...
Ranger Posted September 15, 2009 Report Share Posted September 15, 2009 I'm just guessing Mike. Maybe those PITA heater pipes along the rear head. Link to comment Share on other sites More sharing options...
scramblersts Posted September 15, 2009 Author Report Share Posted September 15, 2009 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 Link to comment Share on other sites More sharing options...
scramblersts Posted September 16, 2009 Author Report Share Posted September 16, 2009 can anyone give me some information on how to proceed? thanks Link to comment Share on other sites More sharing options...
BodybyFisher Posted September 16, 2009 Report Share Posted September 16, 2009 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 More sharing options...
Logan Posted September 18, 2009 Report Share Posted September 18, 2009 Could this be as simple as the AC system simply dripping off? Normal condition? Logan Diagnostic LLC www.airbagcrash.com www.logandieselusa.com www.ledfix.com www.ledfix.com/yukontaillightrepair.html www.ledfix.com/ledreplacements.html www.ledfix.com/j42385toolrental.html Link to comment Share on other sites More sharing options...
scramblersts Posted September 18, 2009 Author Report Share Posted September 18, 2009 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 $$. Thanks Link to comment Share on other sites More sharing options...
BodybyFisher Posted September 18, 2009 Report Share Posted September 18, 2009 well unfortunately it will not hold enough antifreez to get it to the shop. so I need to try and get to the leak somehow. I have done a serch and read one post about having to tilt the motor forward, is there an easy way to do this? A little on the car it is a 97 with 210000 miles and this is the first major problem I have had with it. It still runns great so I would like to try and fix this problem without to much $$. 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 More sharing options...
scramblersts Posted September 22, 2009 Author Report Share Posted September 22, 2009 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. Link to comment Share on other sites More sharing options...
BodybyFisher Posted September 22, 2009 Report Share Posted September 22, 2009 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. 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 More sharing options...
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