I am working on my cousins chevy blazer(96) it seems to be running alright (aside from the thermostat needing to be replaced) except during start up and shut down there is a knocking sound coming from under the engine. I originally thought the sound was in the front dif but am thinking that is not the problem because while running its fine and it drives like there is nothing wrong. The only time the noise is there is during the start up and shut down. What could this problem be?
have the same problem?
Tuesday, August 11th, 2009 AT 2:48 PM