2002 Cadillac DeVille Q&A
2002 Cadillac DeVille Question: Northstar Head Gasket Issue?
I recently let my 1998 Cadillac Deville go back to the dealership because of a blown head gasket. (98 had the highest amount of head gasket failures than any other Northstar) I did an extensive amount of research and discovered 96-99 Northstar engines have a high rate of head gasket failure. It seems that Cadillac’s are not what they use to be because of this Northstar engine. My question is: Is there any particular year model Northstar that doesn’t have head gasket problems? I’m thinking about purchasing a 2002 Deville, but I’m terrified because I might have this same problem all over again? Any advice on what I should do?? - Laoboi
Unfortunately Northstar engine head gasket failures are not limited to the 96-99 model years. Those years are the worst but form my experience just about all Northstar engines are susceptible to head gaskets failures, most commonly after the engine has been overheated due to some other cooling system failure. - Oakman
Cadillac fixed this problem going into the new millennium. They put ls1 bolts, which are much longer than the old ones. What would happen is that the smaller bolts would shimmy loose, warp the threads, and there you have your head gasket problem. But as far as buying another one, go with a 95 or lower, or a 2000 and higher. - Visitor
Cadillac service bulletin 01-06-01-011 deals with oil burning on 1996-'99 Northstar V8s. The cure, says Cadillac, is to do a ring cleaning procedure (seems those long oil change intervals weren't such a good idea after all). Cadillac recommends using GM cleaning kit (P/N 12378545) and Kent-Moore J-45076 induction/evacuation tool to do the job. The cleaner is added into the cylinders through the spark plug holes and allowed to soak the rings for two hours. The cleaner and dissolved crud is then vacuumed out of the cylinders through the spark plug holes, followed by an oil change. Cleaning the throttle body and EGR valve is also recommended. - Visitor
I have never heard of this problem being fixed. I have read that Cadillac is planning to discontinue this engine. I have also read that the thread pitch was changed in 2004. I had a 93 STS go out from under me like this at 100K. I know what you are feeling, I loved this car and loved driving it, but am afraid to trust a Northstar Cadillac again. - Visitor
cadillac should be ashame of themselves for making a messed up engine like that.northstar engines are no good.dont buy another one.dont buy anything with aluminum heads.they cost to much to repair.cadillacs havent been cadillacs for along time. - Visitor
I purchased a bottle of Bars Leak Head Gasket and cooling sealant from Autozone for $59. Everybody told me I was a fool but it seems to have solved my problem - at least temperarily. I was going through a gallon of water per day and now I'm in the middle of week 4 and have added only about a cup of coolant (top off) in that whole time. - Visitor
I'm having the same problem with my 2002 seville STS (112,000 miles).....Dealership wants $4,000 to repair.... - Visitor
I have a 1998 Eldorado ETC that had the same issue of running hot. My mechanic told me that the head gasket was allowing the exhaust to get into the cooling system and causing the engine to overheat. He fixed it by reaming the bolt holes in the engine block and placing steel inserts into the holes. When the new gasket and head bolts were installed the inserts lock into the aluminum and won't allow the bolts to back out again. The cost of the repair was around $800.00 and worth every penny. I've got over 215000 miles on that Northstar engine now and it's still running strong!! The dealership wanted a lot more money to fix the problem, lucky for me that my mechanic retired from Cadillac and now has his own auto repair shop. - Cadillac Fan
DUPED BY BAR'S PRODUCTS INC ON NORTHSTAR ENGINE HEAD GASKET FIX REPAIR I want to crack down on con artist like Bar’s Products Inc, Holly MI and its claims without evidence on Bar’s Permanent Head Gasket Fix that turned out to be crap that followed to costly repairs It is like closing your eyes and writing prescription without having any knowledge on whom is going to the patient That’s apply to BAR’S PRODUCTS INC, Holly, Michigan 48442 BAR'S PERMANENT HEAD GASKET FIX THE SHORT AND EASY WAY TO DAMAGE YOUR ENGINE AND CLOG EVERYTHING BEYOND REPAIR - that gang of evil people keep posting fakes and fabricated reviews all over the internet - roby4help
Just bought the car and it over heated driving 50 miles home. I assume it is the northstar head gasket issue discussed here.
It only blows smoke on start up till it warms up. I am also losing coolant, and oil. I had issues with overheating a while ago, and think I may have blown valve seals.
My 98 Deville is starting to overheat and loose coolant as well. I am sure it is the head gasket because my car symptoms are similar to others who have experienced head gasket difficulties. Would t...
air bubbles in the resovior clicking sounds comes from resovior and it leaks out of overflow the car maintains its normal tempature
Loosing 2 gal. of coolant about every 30 miles.