My son was driving when he heard a strange noise from under the hood and what he thought was smoke. I later determined that it was steam that he saw. He said coolant was leaking all over the place, and after looking, I determined that the water pump had failed. I replaced the water pump and after checking the thermostat, it and the thermostat housing both needed replacing. After doing all of this work, I filled the radiator up with fluid and it wasn't leaking. I started the truck up and inspected again, nothing. I thought the problem was fixed but after ideling for about 5 minutes, I looked underneath and sure enough, was leaking fluid again. Looking through the beam of a flashlight, it appears that the fluid is coming from above and/or around the thermostat housing. I know it is sealed well, it was such a pain to get the damn thing back in, but I know it has. Or should have a good seal. Also, there is a knocking sound coming from the engine. Any ideas or suggestions would be very helpful. I checked the oil and couldn't see any water in it and checked the water coming out for the tell tale sign of a rainbow, indicating petroleum products, and couldn't find any. Thanks and I look forward to talking with you.
Thursday, June 27th, 2013 AT 6:20 PM