PADM Engine Mounts
05-12-2019, 04:58 PM
#16
Rennlist Member
Put in a set of non-active 964 RS motor mounts for a few hundred bucks and be done with it...
But if you did want to retain the active mounts, I'm sure you could source them from Suncoast or Sunset for a bunch less than the dealer is quoting and install them yourself or at an indy...
05-12-2019, 05:21 PM
#17
Rennlist Member
Thread Starter
That's the direction I'm heading but everything about the Dynamic mounts is different from the standard one's. This is exactly why I posted pictures of my mounts. I don't want to buy new mounts, RSS, only to find out they are not compatible with the Dynamic brackets, bolts etc. As far as direct replacements, the best price I've found is $1190 EACH! I don't want to go that way again.
Thanks
Thanks
05-16-2019, 03:56 PM
#18
Rennlist Member
Thread Starter
I just ordered the RSS mounts which should be here next week. I also learned that if you unplug the connectors from the Dynamic mounts you get "PADM Failure" error on the dash. If you plug the connectors back in the fault message does not reappear. Now I need to learn how to code out the mounts failure code. Any help or suggestions would be appreciated.
Thanks
Thanks
05-16-2019, 04:03 PM
#19
Burning Brakes
I just ordered the RSS mounts which should be here next week. I also learned that if you unplug the connectors from the Dynamic mounts you get "PADM Failure" error on the dash. If you plug the connectors back in the fault message does not reappear. Now I need to learn how to code out the mounts failure code. Any help or suggestions would be appreciated.
Thanks
Thanks
05-16-2019, 04:15 PM
#20
Rennlist Member
Thread Starter
Closest good reliable dealer is 6 hours away, Porsche of Co Springs. I spoke with them previously and they suggested adding a resistor as an option. I am not electrically inclined but it sure sounded good! Is a PIWIS the only option for a scanner to code out?
05-16-2019, 06:08 PM
#21
Rennlist Member
Some coding can be done with the Durametric pro, but a bit of a longshot if they have that particular software switch... You can give durametric a call and ask.
I would also be concerned that coding out the active mounts might actually mean coding out the Sport Chrono option, which might potentially eliminate some other functions like rev matching. My experience is that very few service writers or techs at dealerships are familiar with all the things that can be done with PIWIS, and even if they know it can be done, they don't know where in the extensive software tree the function is.
As for a resistor, possible but another longshot. The days that a simple resistor can trick a computer into thinking everything is hunky dory are pretty much gone. How do the active dampers work?
You could also very quickly go from bad to worse if a resistor fix ends up doing damage to the controllers or body computer because of too much current or whatever.
I would also be concerned that coding out the active mounts might actually mean coding out the Sport Chrono option, which might potentially eliminate some other functions like rev matching. My experience is that very few service writers or techs at dealerships are familiar with all the things that can be done with PIWIS, and even if they know it can be done, they don't know where in the extensive software tree the function is.
As for a resistor, possible but another longshot. The days that a simple resistor can trick a computer into thinking everything is hunky dory are pretty much gone. How do the active dampers work?
You could also very quickly go from bad to worse if a resistor fix ends up doing damage to the controllers or body computer because of too much current or whatever.
05-16-2019, 06:11 PM
#22
Rennlist Member
...actually, this web page might give some insight on how the active mounts work if anyone is interested.
Looks like they are ferro-fluid. A magnetic field increases the viscosity of the fluid inside the mount and makes it "stiffer" as it is harder to shove through a small valve orifice.
https://www.brakeandfrontend.com/tec...-trans-mounts/
Note that their estimate of how expensive the mounts are is WAY off!
Looks like they are ferro-fluid. A magnetic field increases the viscosity of the fluid inside the mount and makes it "stiffer" as it is harder to shove through a small valve orifice.
https://www.brakeandfrontend.com/tec...-trans-mounts/
Note that their estimate of how expensive the mounts are is WAY off!
MAGNETO RHEOLOGICAL MOUNTS
Another spin on the active mount concept was developed recently by Delphi. Well-known for their magneto rheological (MR) shock absorbers on Corvettes, Delphi has applied the same idea to their next generation of active motor mounts. Magneto rheological fluids contain small particles of iron suspended in liquid. When an electric current or magnetic field is applied to the fluid, the iron particles line up and effectively increase the viscosity of the fluid. In a shock absorber, this has the effect of increasing resistance and stiffening the dampening action of the shock for a firmer ride. The same approach also works in a motor mount. The first such application for the new MR mounts was the 2010 Porsche 911 GT3 supercar (doubt you’ll see many of those in your shop!).
The stiffness of the MR motor mounts can be adjusted in real time to match the dampening requirements of the engine as speed and load change. The system requires a microprocessor and data inputs that are already available to the powertrain control module. It also uses a fluid pressure sensor within the active mounts to provide feedback so the controller can compensate for changes as they occur.
The bottom line here is that motor mounts have become yet another high tech electronic component. Diagnosis is more complicated and may require special scan tool software (depending on the application), and repairs will be far more expensive that most motorists expect. We’re talking mounts that can cost $150 to $200 or more to replace — plus installation labor. So you want to make sure you’ve done your diagnosis correctly before replacing one of these high tech mounts.
Another spin on the active mount concept was developed recently by Delphi. Well-known for their magneto rheological (MR) shock absorbers on Corvettes, Delphi has applied the same idea to their next generation of active motor mounts. Magneto rheological fluids contain small particles of iron suspended in liquid. When an electric current or magnetic field is applied to the fluid, the iron particles line up and effectively increase the viscosity of the fluid. In a shock absorber, this has the effect of increasing resistance and stiffening the dampening action of the shock for a firmer ride. The same approach also works in a motor mount. The first such application for the new MR mounts was the 2010 Porsche 911 GT3 supercar (doubt you’ll see many of those in your shop!).
The stiffness of the MR motor mounts can be adjusted in real time to match the dampening requirements of the engine as speed and load change. The system requires a microprocessor and data inputs that are already available to the powertrain control module. It also uses a fluid pressure sensor within the active mounts to provide feedback so the controller can compensate for changes as they occur.
The bottom line here is that motor mounts have become yet another high tech electronic component. Diagnosis is more complicated and may require special scan tool software (depending on the application), and repairs will be far more expensive that most motorists expect. We’re talking mounts that can cost $150 to $200 or more to replace — plus installation labor. So you want to make sure you’ve done your diagnosis correctly before replacing one of these high tech mounts.
05-16-2019, 09:49 PM
#24
Rennlist Member
I'm just speculating at this point... Might be worth trying to find someone who really knows.
Sounds like you are in Colorado (I'm guessing Telluride from the distance to Co Springs). I don't know the guys in Co Springs, but maybe call Stevinson Porsche in Littleton and talk to Geoff (service writer) and/or Chance (Mechanic). Chance is one of the few dealership mechanics I would trust, and they might have some insight as to wether you could code out the active engine mounts with PIWIS and not screw anything else up...
Sounds like you are in Colorado (I'm guessing Telluride from the distance to Co Springs). I don't know the guys in Co Springs, but maybe call Stevinson Porsche in Littleton and talk to Geoff (service writer) and/or Chance (Mechanic). Chance is one of the few dealership mechanics I would trust, and they might have some insight as to wether you could code out the active engine mounts with PIWIS and not screw anything else up...
05-16-2019, 11:14 PM
#25
Rennlist Member
Thread Starter
I'm just speculating at this point... Might be worth trying to find someone who really knows.
Sounds like you are in Colorado (I'm guessing Telluride from the distance to Co Springs). I don't know the guys in Co Springs, but maybe call Stevinson Porsche in Littleton and talk to Geoff (service writer) and/or Chance (Mechanic). Chance is one of the few dealership mechanics I would trust, and they might have some insight as to wether you could code out the active engine mounts with PIWIS and not screw anything else up...
Sounds like you are in Colorado (I'm guessing Telluride from the distance to Co Springs). I don't know the guys in Co Springs, but maybe call Stevinson Porsche in Littleton and talk to Geoff (service writer) and/or Chance (Mechanic). Chance is one of the few dealership mechanics I would trust, and they might have some insight as to wether you could code out the active engine mounts with PIWIS and not screw anything else up...
Can't believe i'm the only one who has had this issue. Seems like I've got to go with this on my own and report back so others won't need to go through this.
,
.
05-17-2019, 12:24 PM
#27
Rennlist Member
Thread Starter
I'm just speculating at this point... Might be worth trying to find someone who really knows.
Sounds like you are in Colorado (I'm guessing Telluride from the distance to Co Springs). I don't know the guys in Co Springs, but maybe call Stevinson Porsche in Littleton and talk to Geoff (service writer) and/or Chance (Mechanic). Chance is one of the few dealership mechanics I would trust, and they might have some insight as to wether you could code out the active engine mounts with PIWIS and not screw anything else up...
Sounds like you are in Colorado (I'm guessing Telluride from the distance to Co Springs). I don't know the guys in Co Springs, but maybe call Stevinson Porsche in Littleton and talk to Geoff (service writer) and/or Chance (Mechanic). Chance is one of the few dealership mechanics I would trust, and they might have some insight as to wether you could code out the active engine mounts with PIWIS and not screw anything else up...
05-17-2019, 03:35 PM
#28
Rennlist Member
https://docs.google.com/spreadsheets...it?usp=sharing
10-07-2020, 05:04 PM
#29
I'm new to this thread. I just replaced the driverside PADM mount at my dealer. They took great care of me but it was still $painful$. Has anyone heard of someone rebuilding PADM mounts? Mine apparently has an internal short circuit.
05-16-2023, 07:11 PM
#30
Rennlist Member
On a 991.1, we had both fail with two weeks at 49K miles. They were covered with the CPO, but doubt I would do the same out of warranty. With the number of failures, you would think Porsche knows they have an issue, but nothing has been published of course.