99 STS MAN Posted August 27, 2005 Report Share Posted August 27, 2005 I have a 99 sts It drives fine, no steam from exhaust , I think it has combustion leaking itto the cooling system It takes about an hour to start to overheat while driving on highway but not at idle. I took it to caddy to get it cheacked out he said it was the heads two of the sparkplugs have a little cooked coolant on them.he said it was going to cost !!!!!!!!!!!!! $3,500 !!!!!!!!!!! to repair so there it is Please give me your input!!!!! Thanks Guys!!!!! Link to comment Share on other sites More sharing options...
Scotty Posted August 27, 2005 Report Share Posted August 27, 2005 NO, they can not be retorqued, you might even make it worse and pull threads. Who diagnosed the problem? Was a compression test done? Was the cooling system pressurized to see if it leaks down? You can purchase a test kit to see if you have combustion gases in your coolant at NAPA. Before I jump to conclusions I would do those tests, check the water pump belt and tensioner, change the thermostat. I would call and ask the mechanics at cadillac what other tests they did besides looking at the spark plugs? Mike Link to comment Share on other sites More sharing options...
JimD Posted August 27, 2005 Report Share Posted August 27, 2005 I would like to see a pix of "cooked coolant" on the spark plugs. Many things to be checked before you buy into this $3,500 diagnosis; water pump, water pump belt, belt tensioner, and the list goes on.... Jim Drive your car. Use your cell phone. CHOOSE ONE ! Link to comment Share on other sites More sharing options...
Ranger Posted August 27, 2005 Report Share Posted August 27, 2005 This would not be the first time an overheat situation was misdiagnosed as head gaskets. Have the cylinder pressure test done to BE SURE. As Scotty said, retorqueing is not an option. Link to comment Share on other sites More sharing options...
99 STS MAN Posted August 27, 2005 Author Report Share Posted August 27, 2005 It has a new waterpump, belt, cleaned and cored radiator, new thermostat . a mechcanic at cadillac cheked the car out. Link to comment Share on other sites More sharing options...
DFBonnett Posted August 27, 2005 Report Share Posted August 27, 2005 Cooked coolant? Doubt it. Get another opinion. Local dealer here has a rep for telling whoppers but the outfit there is vying for top honors. As was stated, check the water pump belt and the tensioner that keeps it tight. before you buy into any stealership hookie dookie. Link to comment Share on other sites More sharing options...
Ranger Posted August 27, 2005 Report Share Posted August 27, 2005 Don't forget to check the ourge line for free flowing. If plugged it will cause an overheat situation. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.