Big Rou Posted March 22, 2010 Report Share Posted March 22, 2010 Yesterday my car was running hot so I pulled over to check the level of coolant and was low so I put some. I kept driving and then got a message of low coolant level so I pulled over once more and noticed a crack leaking steam and coolant coming out of the upper radiator hose. I changed it and was looking at the temperature all the way home. It was mostly staying on 197 while driving but then would go up to 199 then 201, 199, and then back down to 197/196. It also goes up when stationed and goes up al the way to 222 or 226 and then works its way back down. Is that normal or could it maybe be that the thermostat might be going out? Link to comment Share on other sites More sharing options...
lothos Posted March 22, 2010 Report Share Posted March 22, 2010 My car pretty much sits at 196 all the time. That's normal. I find that driving slower at about 30mph can bring my temp gauge up to 199. Parked and idling the car, my temp gauge will go up to about 215 or so and the fans cool it off to normal temps again. If I keep sitting it'll rise and fall like that. When you change your coolant like that, air bubbles need to work out of the system and I've noticed that the temps can spike while that happens. I know when I did mine, I had a spike of 221 or 225 or so and was starting to sweat about it. I don't think that sounds unusual, especially with a new coolant change and air bubbles working their way out. If it was my car I would just watch it over the next couple days and see what it does. WARNING: I'm a total car newbie, don't be surprised if I ask a stupid question! Just trying to learn. Cheers! 5% discount code at RockAuto.com - click here for your discount! Link to comment Share on other sites More sharing options...
BodybyFisher Posted March 22, 2010 Report Share Posted March 22, 2010 196 is normal but LOW normal Normal ranges from 196 to 205 and it can rise to 212 to 220 in traffic 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 March 23, 2010 Report Share Posted March 23, 2010 My '97 had the digidash so I could watch the temps. It ran 205 (summer) - 215 (winter). Link to comment Share on other sites More sharing options...
Chris_Austria Posted March 23, 2010 Report Share Posted March 23, 2010 My '99 Seville too... and I have already changed head gaskets, water pump and belt, thermostat, hoses... But idling and slow traffic will bring the temp gauge a little bit over the middle-position and it goes down when I continue driving or if I bring the rpm up to 2000 for about 5-10 seconds. If I do nothing it may need a little bit longer to get back to middle position (middle is about 196 F ??) Link to comment Share on other sites More sharing options...
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