[FrayAdjacent]

Originally Posted by eze5601

2000 Boxster S

Problem 1:

At start up either cold or warm the engine emits white smoke and sometimes a white/blue type smoke. I thought this was typical for the car but now it does it much more than just random. The other dayat a stop light (car was warm) the light turned green and the whole block filled with smoke; it seems to be getting progressively worse.

A bad AOS (Air Oil Seperator) can allow oil to get into the intake. Some signs of this can be oil drippage around the throttle body. You can remove the vacuum line from the AOS to the intake, and if you see oil, replace your AOS.

Originally Posted by eze5601

Problem 2:

A loud “squeaking” noise coming from engine. It sounds like a belt noise but the belt was replaced along with the alternator and the noise is still there. The noise does not get any louder when the engine is reved and seems to go away around 3500 rpm while driving. Once down to idle to noise comes back.

A failing AOS can also make a squeaking sound, so I've heard, which can vary at engine speed.

Originally Posted by eze5601

Problem 3:

Car seems to run a little hotter than in the past. From what I can remember the car would run at approx 180 -185 on the highway and go up slightly at idle. The car is now running approx 200-210 range on highway and may go up approx 5 degree at idle.

This one is probably the simplest one. You should start by removing your front bumper skin, and clean out the radiators. Check the fans for proper operation, also be sure your coolant level is good.


If you don't know how to check the above things, take it to a qualified Porsche mechanic. Have him check the AOS and replace it if it even looks at him funny. If cleaning out the radiators doesn't help the operating temperature, have him check the fans, including the engine bay fan.