jimmv28

im not sure if it is normal, but just got my gs used at 68K miles. there are louder engine noise when you first start the car. took it to lexus they said it is normal. anyone have the same problems. i thought it was the higher milage.

designo

iTrader: (6)

Which GS model is this?

TWong350

iTrader: (8)

Which model and is it a ticking or loud clanking that goes away in a few seconds?

I8ABMR

Mine does the same thing

jimmv28

it is the 07 gs 350. i heard it it the direct fuel injection. very uncomfortable.

CAK 500

The V6 engine uses a high pressure fuel injection pump that produces a sound kinda like what you describe. You get used to it, and it's hardly noticeable inside the car.

ivanz

What exactly do you mean by "when you first start the car"? Like the second after it starts or the first few minutes? Does it sound like metal on metal grinding or just like a diesel engine?

jimmv28

more like diesel engine. and also when you have the ac unit up high the engines really roars when you stand outside of the car. is that normal. my friends notice the engine sound and tell me to let lexus checked it out. i did and they said it is normal. i don't know. Does anyone knows the benefit of the direct fuel injection as to the regular from the older GS?

ivanz

Yes, both are 100% normal. DI gasoline engines sound similar to diesel engines because they both use high pressure injectors.
As for A/C, yes that's normal for any car. If your cars idle wasn't increased when the compressor was engaged, it would stall the engine due to the extra load.