Hi There,

I'm driving a 07 GS 350 with about 8K miles on it. Sometimes when I start the engineI can hear a loud, rough sound right as the engine is completing itsignition process. It soundsas if it is followed by a loud exhaust from the fan or something else in the engine... I tried to identify trends; like when starting cold, starting warm, but it seems to be pretty random when it happens.

Has anyone else experienced this problem?

Thx

Normal.

Thanks...

Do you know what the sound is?

Yeah im pretty sure i know. I dont work till Wed but when i do all find a car like yours and see if i can duplicate the noise.