I have a 97 cadillac seville sls with a northstar engine. It has been in the shop a few times over the past 4 months. It started overheating so I took it to the auto shop, (which was supposed to repair it, so I figured). I had the thermostat, water pump, radiator, oxygen sensors replaced, but none of this seemed to fix my problem. Now it is back in the shop with a blown head gasket (which I do feel could have been avoided had it been properly diagnosed) I am low on funds and can not afford to replace the engine or repair the blown gaskets at this time. I was browsing the internet and ran across many sealants that claim to fix this problem. I would like to know if they really work and if they do which ones would be the best for an inexpensive way to repair my vehicle, or any other suggestions. Thanks!!
97Caddy