bigbaby1234 Posted August 16, 2011 Report Share Posted August 16, 2011 Hello Guys I am back I use to own the 1997 El Dogg I have inherited a base deville I am having over heating issues pretty bad I have changed out the thermostat still hot fans running no problem their please help Link to comment Share on other sites More sharing options...
BodybyFisher Posted August 16, 2011 Report Share Posted August 16, 2011 Check the purge line, check that the system and CAP hold pressure, check the coolant concentration, Smell the coolant in the tank, do you smell exhaust fumes? 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...
bigbaby1234 Posted August 16, 2011 Author Report Share Posted August 16, 2011 no exaust fumes smell could it be the water pump or should i change out raditor and lines Link to comment Share on other sites More sharing options...
BodybyFisher Posted August 16, 2011 Report Share Posted August 16, 2011 Water pumps do NOT cause overheating, especially the NS water pump. The ONLY think that can go wrong with the water pump is 1) a shaft seal leak, or 2) a body seal leak. The body seal leak is more common. If you think the radiator is NOT flowing have it reverse flushed, Just the radiator NOT the cooling system. You can have that done at a radiator shop, and they can pressure test the cooling system at the same time, IT MUST HOLD pressure, they can ALSO pressure test the CAP, it must ALSO hold pressure. If the system does NOT hold pressure, it will boil and lose coolant. DO NOT parts replace, DIAGNOSE, check the PURGE LINE now, then have it pressure tested, check the coolant concentration and look at the water pump belt and tensioner to make sure they are good and the tensioner is not binding and applying good pressure. Many AZZHOLE mechanics immediately replace the water pump and radiator, its a money maker guessing game for them, and it rarely fixes the problem. DIAGNOSE 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...
BodybyFisher Posted August 16, 2011 Report Share Posted August 16, 2011 By the way, describe your overheating to us, what are you symptoms, boil over, DIC messages, how high is the temp gage, etc 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...
bigbaby1234 Posted August 17, 2011 Author Report Share Posted August 17, 2011 ok here goes after 20 mins of drivimng the temp goes all the way to the very top since I have the digatal guages. It says engine coolant hot idle engine and then it says engine hot stop engine and then it never boils over or leaks any where just runs ecessivly hot Link to comment Share on other sites More sharing options...
BodybyFisher Posted August 17, 2011 Report Share Posted August 17, 2011 OK, do me a favor and check for codes, see the bottom of this post, to retrieve the codes and post them here... 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...
bigbaby1234 Posted August 17, 2011 Author Report Share Posted August 17, 2011 could it be the head gaskets uts starting to steam now Link to comment Share on other sites More sharing options...
BodybyFisher Posted August 17, 2011 Report Share Posted August 17, 2011 what was the result of your checking the purge line? steam is not always an indication of a bad head gasket. Do you smell coolant at the exhaust? 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...
bigbaby1234 Posted August 17, 2011 Author Report Share Posted August 17, 2011 mechanic took off water pump its fine all metal no plastic will check purgr line now can you get a new purge line no coolant exaust smell Link to comment Share on other sites More sharing options...
KHE Posted August 17, 2011 Report Share Posted August 17, 2011 The purge line is the 3/8" to 1/2" hose that connects to the top of the surge tank. Disconnect that and have a helper start the engine. Coolant should flow out of the hose. If not, you need to trace it back until you find the source of the restriction. If the purge line is not flowing, the engine will overheat. Kevin '93 Fleetwood Brougham '05 Deville '04 Deville 2013 Silverado Z71 Link to comment Share on other sites More sharing options...
bigbaby1234 Posted August 17, 2011 Author Report Share Posted August 17, 2011 the purge line is fine no restricitions the next step is the radiator we have checked everthing else except the head gaskets Link to comment Share on other sites More sharing options...
BodybyFisher Posted August 17, 2011 Report Share Posted August 17, 2011 the purge line is fine no restricitions the next step is the radiator we have checked everthing else except the head gaskets explain what you did, and the results of your test to determine it was ok, did it flow coolant? at the end by the tank? It is not a matter of the line being clear, it is a matter of the line flowing coolant, did it flow coolant at the tank? radiator is not usually the problem as the water pump is not the problem as stated in my prior post, but if you insist What was the result of the mechanic's PRESSURE TEST? COOLANT CONCENTRATION TEST? CAP test? Those are meaningful tests NOT removing METAL WATER PUMPS 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...
bigbaby1234 Posted August 17, 2011 Author Report Share Posted August 17, 2011 all test were fine coolant flows and no results yet from radiator thank you Link to comment Share on other sites More sharing options...
Ranger Posted August 18, 2011 Report Share Posted August 18, 2011 It's time to get a block test kit and check for exhaust gases in the surge tank. You can borrow one from Autozone and just pay for the test solution. Link to comment Share on other sites More sharing options...
bigbaby1234 Posted August 18, 2011 Author Report Share Posted August 18, 2011 ok I will do that tomorrow thank you so very much Link to comment Share on other sites More sharing options...
bigbaby1234 Posted August 28, 2011 Author Report Share Posted August 28, 2011 thanks guys for the help Itraded the 2002 deville for 2004 dts so fa so good But I hear noise comin g from the front end when backing up and turning what does the motor sound like when the motor mounts are going should the car sound lound when starting does the north star in these models have a strange sound my old el dogg was very quiet to this model help car runs okay no missin or smoke or oil burning Link to comment Share on other sites More sharing options...
Ranger Posted August 29, 2011 Report Share Posted August 29, 2011 The motor mount should have no affect on the sound of the engine. Link to comment Share on other sites More sharing options...
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