Don, I definitely would like to know more about that, I have a 02 Deville, beautiful but mileage is 236k, runs like a sewing machine. Its running hot over the road, gasses in the coolant system like yours. This car can be a good candiate.

 

Don, please sent me some pictures and in detail what I need to do. I truly believe this will solve my problem for now at least. I really hate to dish this car. Its w beautiful Vintage Series Cadillac Deville, pearl white. I don't drive it that much but I love to keep it around, its my Sunday car.

 

had same problem with coolant lose from surge tank cap. problim was blown head gasket.used thermagasket kit for northstar engines. fixed the problems with the leak and car running hot .go to thier web site thermagaskit .com.