Rx 330 Tapping Engine Noise

[mjf716]

I traded a quiet RX 300 for a 2004 RX 330. At idle or in neutral there is a tapping noise that sounds like valves but the dealer says it's the fuel injectors and that Lexus has not yet addressed it. Anybody have any fixes or suggestions?

[steviej]

go to your dealer and sit in a demo RX330 and see if that one does it also.

Then go sit in an 04 ES330 and see if that one does it.

They all have the same motor.

If it doesn't then ask the dealer so swap out the fuel injectors of the motor that doesn't make the sound with your injectors that he claims is the problem.

push the warranty/customer satisfaction issue.

It would be very easy to pinpoint to a fuel injector by using a long (I mean long) screw driver. Place the metal end on the motor next to injector and place the front of your ear on the other end of the screw driver. You will be able to hear the clicking/tapping quite loudly if it were the injector.

A stethescope works great hear and there is even a mechanics tool called a "Chassis Ear" that will pinpoint noises quite accurately.

steviej