very strange.... how the cars on here some are pulling air in and the others blowing the air out.... I really would like to know the CORRECT way... lol

 

I've got a call in to my Service Tech - he's looking through the Porsche lit to see what it says.

 

Factory decklid, fan and harness - what would not be OEM config?

 

The correct way is pulling air through the deck lid and blowing it over the engine.

I have a good friend that works at PCNA (in management). I asked him several weeks ago if the deck lid fan on all 996 Turbos blow air into the engine compartment, and here was his e-mail answer...

"Yes, all 996 Turbos blow into. I checked with our PCNA technical manager".

 

As I posted in another thread here, the Boxster uses the same engineering approach to the engine compartment cooling fan...it pulls air in through the right side intake and blows it over the engine. The air exits below the engine compartment.

 

My Indy Service Tech (ex-Porsche Dealer Tech) checked all literature and found nothing designating the proper airflow direction (checked factory P-Car Service manuals and bulletins for all years 996TT).

The literature calls it a "Scavange" fan.

 

the GT3 parts catalog call it a blower and it is shown facing out the engine cover not toward the engine. this is interesting...and confusing

 

Does it show the fan blades and direction of rotation. If not, there is really no "facing" since the fan-to-motor relationship does not identify which way the airflow is.

My deck lid fan has the motor below (towards the engine compartment) the fan, and it most definitely blows air into the engine compartment.

 

does yours run all the time? mine does not...the fan blades are toward the outside but the fan motor is in toward the engine as is yours but I assure you mine exhausts air and only when the compartment is hot..it does not run whenenver the motor is running...try to accept what I am telling you because it is quite possible the GT3 is very different than the turbo...especially if the fan on the turbo runs all the time

 

Tech Bulletin exerpt 12-28-01

Section 5.5.4 - states: If the fan is functioning correctly, the sheet should be sucked to the trunk lid.

I don't have service bullletins later than this, so there may have been a change afterwards in the airflow direction (as some others have speculated).

 

my 2003 when stock the fan would run also while engine was running and at times stay on after i shut the car off... and again mine was stock and the fan would PULL air into the decklid.. know that I installed a new wire harness that came with my decklid wing its blowing air out of the decklid.. also runs when the engine is off..

 

so RIA yours is not working the correct way.. you said yours is blowing air up and out correct?

 

I have never said I didn't believe what you said.

 

if there are two wires going to the fan then all you need to do is reverse the wires and the fan will run the other way...if there is only one wire going to the fan it will require more complex surgery


dock: does your fan run all the time?

 

According to PCNA there was no change in any 996 Turbo...all of them pull air into the engine compartment.

Maybe some of the 996 Turbos coming off the line were wired wrongly.