Strange Noisе

[orxidea]

Hello to all

I have Lexus ES 330 2004 which until last summer was okay. Then one of my family member crash and hit the rear of the car had to be repaired and painted.

Since then, when temperatures are above 80F is heard sometimes noise from the front when I start
the car after standing all day in the sun Hear it inside to the feet of the passenger next to me. The problem is that when I drive awhile and then stop the car and then start again the noise stops. Sounds like something switches alternately rises and then recede.

I went last summer to Dealer but they said everthing is Ok ...but it's not.Any suggestion?