1999 Cadillac Seville STS review from North America

I bought this car to repair. The person before me had blown the head gasket and the oil pan was leaking. Also, after driving, I noticed one of the motor mounts was broken, but this is very common in front wheel drive vehicles, especially with 100,000 miles.

After getting the car home I realized that the thermostat had stuck, but I still could not understand why the head was blown. These engines are designed to run for up to 50 miles with no water in them. After further inspection, I found that some moron had put the relays to the radiator fan motors in backwards. If they had not, the engine would have been fine with just a $12 thermostat replacement.

As far as the oil leak goes. The mid-late 90's Northstar engines did have a problem with their oil pan gaskets and plugs, and why they did not issue a recall I have no idea. This is a fairly inexpensive and simple repair though, and from what I understand the newer engines have no problems with it.

After repairing the car I have had no problems. These are very good cars and excellent engines. I have owned several Cadillacs in the past, all with good results.

I would recommend though, if your Cadillac has a Northstar and you notice it getting warmer, immediately turn the engine off.