Ok I hope I am in the the right forum. As I have been reading about the Northstar 4.6 it has a history of overheating while driving down the hwy. My problem is mine overheats while at idle or low rpms. When driving down the hwy it seems to run fine. I have had it in the shop, run a car fax on it, called other dealers that have
recorded repairs on it. It looks like water pump, sending unit, thermostat, radiator cap have been all replaced. My GM shop is not set up to test for exhaust gases in
I have been reading about some solutions for head gasket repairs, have even called a company that sells steel-seal. When telling him about how my overheats while
at low rpms he wondered for sure if mine was actually head gasket. So now I'am at a stand still. I have found a 96 Cadillac Deville with hail damage and trany
problem and thought about pulling that engine, but would I end up with same problem. Then I thought of replacing the engine and have found a GM engine for 4800.00. Will I still have the same problem after a few years. Is it worth putting that kind of money in a 1998 Cadillac Seville with 127000 miles on it. The car is probably a
8 on a scale of 1-10, 10 being great. I just bought the car and the dealer won't stand behind it. I may have 300 miles on it since Dec 28 2011.