I took my RX300 to the dealer for some work before the warranty runs out. One item I asked them to fix is engine knocking. I don't know if it is from valves or injectors or something else. When we step on the gas, the engine knocks/rattles pretty loudly. When I let off the gas and step on it again, the rattling sometimes goes away temporarily. The dealer said this is normal. I'm not sure I believe it because it didn't make this noise until about 9 months ago. Does anyone have a similar problem/solution/advice?
Thanks - Jake