Back in 2009, I bought a 2004 Monte Carlo SS Dale Jr. edition with the supercharged 3800. It had 87,000 miles on it and it had a leaking intake manifold gasket when I was looking at it. I was able to get the owner to reduce the price because of the leak and I had it fixed right after buying it. I also replaced the thermostat and radiator cap with Delco parts. I never had any temp issues the four years that I owned it.