Radiator Cooling Flaps Question
Thread Starter
Rennlist Member
Joined: Jul 2008
Posts: 2,200
Likes: 2
From: Aurora, Ontario, Canada
Radiator Cooling Flaps Question
Hi all,
Quick question,
With the key off or the flaps at full open, how far off horizontal are they generally? The reason I ask is that mine seem to be not moving past the 30% open stage.
And, just for S&G, the manual adjuster **** seems to be non-functional. (It did work at one time...just not now of course....
)
Thanks!
Quick question,
With the key off or the flaps at full open, how far off horizontal are they generally? The reason I ask is that mine seem to be not moving past the 30% open stage.
And, just for S&G, the manual adjuster **** seems to be non-functional. (It did work at one time...just not now of course....
)Thanks!
Burning Brakes
Joined: Jan 2007
Posts: 1,117
Likes: 2
That along with tire press system is usually rendered inop as quickly as possible. Letting a simple brain and a couple sensors decide if and when to open the flaps or not and cook your engine does not appeal to most.
Thread Starter
Rennlist Member
Joined: Jul 2008
Posts: 2,200
Likes: 2
From: Aurora, Ontario, Canada
That
.
Burning Brakes
Joined: Jan 2007
Posts: 1,117
Likes: 2
The flaps were a big mistake and Porsche recognized this and eliminated them on the last GTS. So few people have ever seen the airflaps working as designed. So rather than wondering how they should work you might just open them up manually and disable the system.
Other wise some hot day far from home your car may decide to close the flaps and you overheat the car and trying to get in and open them is not all that easy on the road with few tools at hand. And that is the wisdom which you are free to ignore
Other wise some hot day far from home your car may decide to close the flaps and you overheat the car and trying to get in and open them is not all that easy on the road with few tools at hand. And that is the wisdom which you are free to ignore
Three Wheelin'
Joined: Feb 2004
Posts: 1,748
Likes: 357
From: St. Augustine, FL
I disconnected the arm attached to the motor and zip-tied mine open. I don't need the "Warm Up" benefits here in Florida.
Let me know if you need a pic of this but it sounds like you're trying to keep it functioning.
Let me know if you need a pic of this but it sounds like you're trying to keep it functioning.
Trending Topics
Three Wheelin'
Joined: Mar 2010
Posts: 1,307
Likes: 3
From: Colorado Springs, CO USA
They worked on my '88, but I sold it a few weeks ago, so can't check. I seem to remember, though, a section in the service manual that discusses how far open or closed they should be under different situations... probably in the same area that discusses fan controller voltage versus temperature. If you haven't found it already by then, I'll take a look through the manual tonight.
Three Wheelin'
Joined: Mar 2010
Posts: 1,307
Likes: 3
From: Colorado Springs, CO USA
Drifting
Joined: Aug 2003
Posts: 2,259
Likes: 3
From: Camarillo, CA, USA
For the automatics, the flaps direct air flow towards the transmission cooler. The fan/flap controller also monitors the transmission temperature sensor.
WSM Vol 1 provides an explaination and graph of the various flap % open settings based on coolant/transmission/air intake temperatures or AC refrigerant pressure.
WSM Vol 1 provides an explaination and graph of the various flap % open settings based on coolant/transmission/air intake temperatures or AC refrigerant pressure.
Nordschleife Master
Joined: Jul 2011
Posts: 5,662
Likes: 25
From: North Country
The flaps were a big mistake and Porsche recognized this and eliminated them on the last GTS. So few people have ever seen the airflaps working as designed. So rather than wondering how they should work you might just open them up manually and disable the system.
Other wise some hot day far from home your car may decide to close the flaps and you overheat the car and trying to get in and open them is not all that easy on the road with few tools at hand. And that is the wisdom which you are free to ignore
Other wise some hot day far from home your car may decide to close the flaps and you overheat the car and trying to get in and open them is not all that easy on the road with few tools at hand. And that is the wisdom which you are free to ignore
Addict
Rennlist Member
Rennlist Member
Joined: Jul 2001
Posts: 7,333
Likes: 117
From: Shawnee, KS, USA
As Borland said, see the WSM pp. 19-11 through 19-26 for detailed info. Page 19-19 has the specific base measurement you need to start from.
Perhaps this will help you for a quick check, though.
Assuming my flaps are at the 100% open setting, I noticed something convenient: a straightedge inserted as follows will lay pretty flat across one of the flaps on the middle row:
Furthermore, it's at about a 45° angle with respect to the ground (and I think my car is pretty close to the standard ride height at all four corners and the floor is within 2° to 4° of flat):
Straightedge was resting on this middle row flap (hmmm... I need to do some cleaning!):
Perhaps this will help you for a quick check, though.
Assuming my flaps are at the 100% open setting, I noticed something convenient: a straightedge inserted as follows will lay pretty flat across one of the flaps on the middle row:
Furthermore, it's at about a 45° angle with respect to the ground (and I think my car is pretty close to the standard ride height at all four corners and the floor is within 2° to 4° of flat):
Straightedge was resting on this middle row flap (hmmm... I need to do some cleaning!):
Thread Starter
Rennlist Member
Joined: Jul 2008
Posts: 2,200
Likes: 2
From: Aurora, Ontario, Canada
Thanks!
[QUOTE=Ed Scherer;9473887]As Borland said, see the WSM pp. 19-11 through 19-26 for detailed info. Page 19-19 has the specific base measurement you need to start from.
Perhaps this will help you for a quick check, though.
it's at about a 45° angle with respect to the ground (and I think my car is pretty close to the standard ride height at all four corners and the floor is within 2° to 4° of flat):
Thanks Ed!
(Man, one simple question......
)
Perhaps this will help you for a quick check, though.
it's at about a 45° angle with respect to the ground (and I think my car is pretty close to the standard ride height at all four corners and the floor is within 2° to 4° of flat):
Thanks Ed!
(Man, one simple question......
)
Pro
Joined: Feb 2006
Posts: 703
Likes: 17
From: Australia
Hi Rob,
Flaps on my 1990 S4 work properly. Just checked my car, cold, not driven for several days. From observation I'd say mine are open about 45 degrees.
Angle touch test?
When I insert my arm straight through the grills at the front of the car, palm up, fingers relaxed and hence hand curved, the backs of my fingers sit flat atop one of the blades pretty much at the same angle as the blade(s). With my hand the other way up, with finger tips on top rear highest part of the blade, I have a difficult job bending my fingers back far enough for the fronts of my fingers to lie flat on the blade.
Oh by the way don't do this when someone turns the ignition on - if the engine is cold they will then close very hard and fast and I reckon it'd really hurt.
Cheers
Flaps on my 1990 S4 work properly. Just checked my car, cold, not driven for several days. From observation I'd say mine are open about 45 degrees.
Angle touch test?
When I insert my arm straight through the grills at the front of the car, palm up, fingers relaxed and hence hand curved, the backs of my fingers sit flat atop one of the blades pretty much at the same angle as the blade(s). With my hand the other way up, with finger tips on top rear highest part of the blade, I have a difficult job bending my fingers back far enough for the fronts of my fingers to lie flat on the blade.
Oh by the way don't do this when someone turns the ignition on - if the engine is cold they will then close very hard and fast and I reckon it'd really hurt.
Cheers
