Overheating of the engine may cause the cylinder head to expand, severely straining the head bolts and damaging the threads in the engine block. This commonly results in a blown head gasket. Our technicians tell us the engine block threads must be repaired before the cylinder head is reinstalled.
Engine Overheating Due to Leaking Headgasket on Cadillac Seville STS
Average mileage: 109,672 (10,600–189,000)
23 people reported this problem
7 people shared problem details
the car ran hot sense new gm did nothing and the car used oil also they are scammers they defrauded the public with the sts Seville it junk now hve 108 k on itbad heads it always used antifreeze and now I need engine gm is responcable for this and need a class action law suit
JUST BOUGHT THE CAR TODAY AND TONIGHT ENGINE HOT A/C OFF POPS ON. ENGINE GOT VERY HOT. TAKING IT IN TOMORROW. PAID 5700.FOR THE CAR TODAY :(
1998 Cadillac Seville STS102,000Visitor
not fixed yet
1999 Cadillac Seville STS89,900Visitor
Blown head gasket...don't buy a Cadillac. My Lexus and Nissan products have over 300,000 miles on them.
2000 Cadillac Seville STS134,000Visitor
car overheat put a new water pump put new radiator change the coil packs new thermostat still overheating
1999 Cadillac Seville STS189,000Visitor
although coolant level is correct, changed thermostat, water is flowing through engine, water pump fine, and cooling fans work correctly. ive been told its a leaky head gasket
2000 Cadillac Seville STS98,000Visitor
Overflow from coolant fill cap due to exaust leak into cooling system. Had all gaskets replace.
changing head gaskets
My STS ( 180000 miles) is overheating in traffic after driving on the highway with AC on high....
Did GM ever upgrade the head gaskets in the 4.6L northstar engine in later years? If so which y...
I AM LOISING ANTIFREEZE I'VE BEEN TOLD THAT I NEEDED A WATER PUMP I HAD THAT DONE DIDN'T STOP T...