New to Boxsters and need some info

[usridzero]

Guys, I just bought my first Porsche, a 1999 Boxster, with only 52K miles on it.

Today temperatures in NoVA were well over 100, feeling like 108. While the car was performing normal, the temperature gauge reached 200. The cooling fans were running most of the day, so I figured its all normal, right?

The concern I have now is that once I got home, and backed the car up my driveway, the car was making a rattle-ling noise coming from the back. It sounded like old valves with low or no oil. The noise was only noticeable while releasing the clutch and at low RPMs, very small rattle at idle, but not at high RPMs.

Am I making too much of it? should I be concern about today's hot temperatures? I am due for an oil change, and I am worry that the car might have over-heated and caused that rattle noise now on the back.

Any suggestions?