I agree whole heartedly wtih Hugh on the importance of rinsing out your cooling system well. But I will add a cautionary tale of my own misfortune: I owned a 56 Buick that had sat idle for a long time before I bought it from a body shop where it's previous owner had abandoned it. They started the car and got it idling dependably before I came to pick it up, so God only knows the list of smart things they DIDN'T do to the car before starting it. Anyways, when I did pick it up, it ran well enough, but got very hot very quickly as I was driving home. I didn't have much experience with cars at the time, but I figured that flushing the cooling system would be a good idea. I don't remember exactly where I put the garden hose into the cooling system, but it was doing a great job of flushing things, as evidenced by all the crud that was being washed out of the engine... until my heater core couldn't hold the pressure and blew out letting dirty water run into the passenger compartment. Point is: flush your engine and cooling system all you want, and as Hugh said, "blast" water and cleaner through the block as often as you want. BUT, be careful if you don't disconnect your heating system not to use too much pressure... Because it would be a crying shame to do this to an Imperial.(mandatory content) > While the radiator is > off, blast water and > cooling system cleaner through the block as often as > you like. Removing the > water pump for greater access is a good thing too. __________________________________________________ Do You Yahoo!? Great stuff seeking new owners in Yahoo! Auctions! http://auctions.yahoo.com