98 Cadillac Seville STS, also have a 96 Voyager (work car)
So I've recently changed the water pump and thermostat on my 98 STS. It used to overheat like crazy before this but not so much now. The the temp gauge goes up towards hot once in a while but it goes back to the middle when I give it a little gas in either drive or idle, doesn't matter. I also hear a weird "gurgling" sound when I give it a little gas. ??? I constantly need to keep adding coolant, I would say every 2-3 days so the leak is still there and some slight overheating is still there. I seriously doubt it's the head gasket because there's no smoke coming out from anywhere and plus I think I would be able to tell if it was the head gasket, you can't miss it I would imagine. Surge tank looks fine to me as well. I'm thinking maybe the radiator? Any suggestions and/or advice would be fantastic. This overheating/coolant leaking problem is really starting to get to me. Thanks in advance.