Hi Guys
picked up a 2003 C4S im noticing a noise when driving(its louder on the highway),hard to explain it sounds like when a coffee pot is at the end of the brew but constant and loud,any idea what it could be,its a 1 owner car with 23000,clean car fax

 

check the cats....

 

had a service tech at the porsche dealer drive it,he said he thinks its tires,what should i look for on the converters?

Thanks for the help

 

What tires are you using?My guess is your Porsche tech is right.Does the sound change with the road surface and tire temperature?If so he's probably right if not then get a second opinion.

Terry

 

HAVE CONTINENTAL SPORT CONTACT 2,the rears are 75% worn,the fronts dont have alot of wear but the car did sit alot with the previous owner,and yes the sound does change with road surface,im hoping its tires,getting new ones next week,im going to try the Sumitomo's,i heard alot of good things on them,and i dont track the car

 

Sounds like a good plan Albert.Keep us posted.

 

Bridgestone 050 Pole Positions. cat issue would be a rattle-like sound and noticable lack of power on acceleration. hard to describe tire noise...changes with every road surface. good luck.

 

Those low profile Conti's tend to flat spot if the car sits in one place for very long.

Hope new tires fixes it.

 

Brando, I bet 4 of your RH turbo rims would solve the problem.

 

These cars aren't that rare... Maybe you could find a fellow Porsche owner in the area that would be willing to let you test drive your car with his/her wheels and vice versa. It would answer that question pretty quick. I would guess it's possible that you could have a bent rim and that wouldn't be fixed by changing just the tires.