UncleRay

iTrader: (2)

If I'm revving my engine at idle, and I go past 2rpms, and release the pedal, I can hear a not so very loud clinking sound. It basically sounds like either the timing belts are almost done, or there's something else. I really do not know what it may be.

Any ideas?

LexusIV

Well first off, if your car has over 90,000 and the timeing belt hasnt been changed its very important you do so on the GS400 because if it breaks it will cause big problems.

So have you been able to pin point a location of the noise?

Could be a blown cat. They wear down overtime and eventually the mesh insides breaks apart and then rattles around.

UncleRay

iTrader: (2)

I'll definitely look into the past history maint. of the car. How much do you think the timing belts would go for?

The sound seems to be coming from the belts, but i'm not too sure.

TAMR_GUS98

Check your serpentine/drive belt tensioner pulley. Take off the belt and then start it up. If the noise goes away then check all the pulleys. In this instance it is likely to be the tensioner pulley.
Good Luck,
-Will

UncleRay

iTrader: (2)

Where would I find those? I'm a newbie.

amkread

the tensioner pulley is the adjustable pulley on your drive belt used to remove slack when replacing it.

UncleRay

iTrader: (2)

Took the car out to a Lexus Dealership, and they said it was the Drive Belt. Had it changed, no more noise =] Thanks for your help guys!!!