I've had my car for about three months now and everything is going great except... The engine is noisy at idle. It sounds like the valves tapping. I've had several people say my engine sounds funny. I took it in for it's 1000 mile once over at the dealer and they made no mention of the noise nor did I ask them about it.

Is it the direct injection that makes it sound so tappy?

 

Yup, its because of the DI. Nothing to worry about. But there are lots of threads on this topic and did like a 10 sec search came up with this https://www.clublexus.com/forums/is-...d-at-idle.html

 

Yes my IS350 does this, normal with DI.

 

tick tick tick.....

just tell people you got a diesel engine in there....

 

A fast diesel (if it's a 3.5L).

 

That was my first concern when my car was going into my driveway... I heard that noise also...I was like ***** I have to go back the the damm dealer...now I know it normal too...

 

There's an old DSM(Mitsubishi) trick to quiet the lifters...buy a quart of rislone and sub it for one of your quarts of oil...it will quiet the lifters from ticking. Used in my 2g turbo eclipse and both my Evo's...and now i use it in my is350.

Hope it helps!

 

^^nothing to do with the lifters.... its the direct fuel injectors that's making the ticking noise.

 

Mine is still ticking normally.

 

welcome to the direct injection surprise club. You and many of us with the 3.5 l motor are kind of alarmed when we first get the car and we drive it for the first week. I remeber the first time I heard after getting my 3GS I thought something serious was wrong with the car. I then checked the forum and saw that it was a very common issue

 

The injectors have approx 750-800psi at idle and approx. 1200-1400psi at full throttle,so there is no way to quiet them down

 

Are they usually reliable? I do like the horsepower and fuel efficiency.