strange sound from the engine!

[JonasGranlund]

When my engine gets warm and I have it on around 1k RPM and just touch the gas so it goes toward 4k RPM without any gear in it start to make this screaming sound sometimes and sometimes it stops after I do the samt thing again.

It sounds like the real high pitch noice come from the hydralic for steering/Clutch box but Im not 100% sure, I have checked the fluids and it looks ok.

Does anyone know what the problem is?

I have checked so it isnt from the AC

Best regards

Jonas

[JonasGranlund]

Hello again!

I took it to a Service facility and it is something that preassure in extra air (to the turbos?) once in a while, and this little fan can make the most horrible noice, just so you know what too look for if you get an metalscream sometime.

Loren, maybe you know what I mean and can give me the number/price on it?

Best regards

Jonas

[Loren]

Maybe the emissions air pump?

[JonasGranlund]

Hello Loren!

It is called secondary airpump

and it can really Scream...

[Loren]

996 605 104 00 Air Pump - retail $614.52

Try our friends at Sunset Imports (Porsche Parts at Dealer Cost) for a better price.

[JonasGranlund]

Hello Loren!

Ive been quite hard against the guy that I bought my car from about the ignition coils so he will buy 6 of them for me so I just need to pay the replacement, maybe I can get him to help me pay this item also.

cause it is some other error with the car that he must have known about but didnt tell me.

Thanks alot for the help.

Jonas

[boli 996]

What's the function of this secondary air pump ?

Is it easy to check if it's working ?

Edited August 26, 2005 by boli 996

[Loren]

What's the function of this secondary air pump ?

Is it easy to check if it's working ?

It is used for meeting emissions regulations at start-up/warmup.

It usually sounds like an electric vacuum cleaner (to me) and can be heard immediately at startup until the engine has warmed to a level that it can control emissions.

[GaryFB]

When my engine gets warm and I have it on around 1k RPM and just touch the gas so it goes toward 4k RPM without any gear in it start to make this screaming sound sometimes and sometimes it stops after I do the samt thing again.

It sounds like the real high pitch noice come from the hydralic for steering/Clutch box but Im not 100% sure, I have checked the fluids and it looks ok.

Does anyone know what the problem is?

I have checked so it isnt from the AC

Best regards

Jonas

<{POST_SNAPBACK}>

I have had this problem on a few 996tt, the noise sounds like a bad power steering pump. Sometimes the noise is so bad you are afraid to drive the car. The problem is the serpentine belt roller. If you remove the belt, start the engine, and the noise goes away, then turn or spin each item, you should be able to feel the bad one. Tell us what you find. Thanks-Gary

[GaryFB]

When my engine gets warm and I have it on around 1k RPM and just touch the gas so it goes toward 4k RPM without any gear in it start to make this screaming sound sometimes and sometimes it stops after I do the samt thing again.

It sounds like the real high pitch noice come from the hydralic for steering/Clutch box but Im not 100% sure, I have checked the fluids and it looks ok.

Does anyone know what the problem is?

I have checked so it isnt from the AC

Best regards

Jonas

<{POST_SNAPBACK}>

I am assuming your car is a 996tt? The air pump is electrically operated and will only operate on cold starts, and will only operate for approximately one minute. If the noise goes away completely, after one minute, it could be the electric air pump. If the noise verys with rpm , and does not go away, I would suspect the serpentine belt rollers. Lets us know what you find. Thanks-Gary

[JonasGranlund]

Hello Gary!

The car is a 996TT and the noice does not verys with RPM and does not go away after one minute. It was the service technichan at Porsche that told me it was the secondary airpump that screamed. I have it on a big service now and will get the car back on monday so hopefully I will know a little more then.