exchief Posted February 6, 2015 Report Share Posted February 6, 2015 I have a 2000 Cadillac SLS with a overheating problem. Changed water pump, radiator cap, thermostat, checked purge line fluid flowing. When it starts to overheat if I rive the engine the gauge goes back to normal, then starts to rise again. Secondly, the battery light comes on when I'm at idle for a period of time. Third, the blower for the heater sometimes does not turn on unless I kick the lower panel on the passenger side on the car. Any suggestions on my problem ? Link to comment Share on other sites More sharing options...
barczy01 Posted February 6, 2015 Report Share Posted February 6, 2015 How many miles are on the car? Might be worth your money to do a combustion leak test to confirm if its a head gasket or not. The other problems might be an alternator and a blower motor and or connector. Link to comment Share on other sites More sharing options...
KHE Posted February 6, 2015 Report Share Posted February 6, 2015 Why did you change the waterpump? Check the connection to the blower motor - the plug may have overheated and is not making good contact with the motor contacts. The serpentime belt may be slipping on the tensioner - check the tensioner to make sure it is putting the proper amount of tension on the belt. Kevin '93 Fleetwood Brougham '05 Deville '04 Deville 2013 Silverado Z71 Link to comment Share on other sites More sharing options...
Cadillac Jim Posted February 6, 2015 Report Share Posted February 6, 2015 With a 2002 SLS, you can check the OBD codes yourself using the A/C buttons and the message display. Any problem involving an electrical system, such as bad cooing fan relays, will throw an OBD code. See the link in my signature block for a Caddyinfo page on how run the codes for your car. -- Click Here for CaddyInfo page on "How To" Read Your OBD Codes-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data -- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC Yes, I was Jims_97_ETC before I changed cars. Link to comment Share on other sites More sharing options...
exchief Posted February 6, 2015 Author Report Share Posted February 6, 2015 KHE I changed the water pump a last summer because it seized up and burnt the belt, idler pulley and the pulley on the engine shaft that runs the pump. Link to comment Share on other sites More sharing options...
exchief Posted February 6, 2015 Author Report Share Posted February 6, 2015 BARCZY01 The car has approx. 97,000 miles on it. The alternator was replaced approx a year ago. Link to comment Share on other sites More sharing options...
winterset Posted February 6, 2015 Report Share Posted February 6, 2015 Ditto on the combustion test on the surge tank. Also, on a cold start, check if the hoses get really hard quick when the Car is still cold, or stick the overflow hose from the surge cap into a jar of water, and see if alot of air bubbles blow out - especially on giving the engine some rpm's. Link to comment Share on other sites More sharing options...
KHE Posted February 7, 2015 Report Share Posted February 7, 2015 KHE I changed the water pump a last summer because it seized up and burnt the belt, idler pulley and the pulley on the engine shaft that runs the pump. Got it - there are so many people who have an overheating Northstar and they change the water pump in an attempt to cure the overheating problem which NEVER does as a water pump either works or it doesn't. A leaking water pump still pumps coolant. Time to do a combustion gas teat on the coolant. If the headgaskets are shot, it's not the end of the world and can be repaired - very reasonably if you do the work yourself. I put a transmission into a '97 STS a year ago because my wife loves the car and it was cheaper than finding something newer. Kevin '93 Fleetwood Brougham '05 Deville '04 Deville 2013 Silverado Z71 Link to comment Share on other sites More sharing options...
barczy01 Posted February 7, 2015 Report Share Posted February 7, 2015 There is a friend of mine out East in your area that has been doing these jobs for years and is still currently at a Cadillac Dealer. I suggest you call him, he is a good guy and very fair. Jim 610-529-1346 Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.