New TSB re:RMS
06-01-2009, 01:05 PM
#1
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New TSB re:RMS
3/08 1359 Dated 5/18/2009
Interesting what is addressed:
We have since discovered that a leaking crankshaft sealing ring on the flywheel side can also be caused by a leaking or manipulated1 engine vacuum system.
Important Note — Manipulating the factory installed engine components
The following will disrupt the vacuum conditions in the crankcase which can damage the crankshaft
sealing ring on the flywheel side causing it to leak oil.
•Pulling off the vacuum supply to the exhaust flaps.
— Modified (negative ) engine power characteristic.
— Increased noise level over the entire rpm range.
•Deleting factory installed exhaust components.
•Replacing factory installed exhaust components with non-approved parts.
Additionally, the correct flywheel for the engine must be used. The incorrect flywheel will not disrupt the vacuum inside the engine however the increased crankshaft vibrations may damage the seal.
Interesting what is addressed:
We have since discovered that a leaking crankshaft sealing ring on the flywheel side can also be caused by a leaking or manipulated1 engine vacuum system.
Important Note — Manipulating the factory installed engine components
The following will disrupt the vacuum conditions in the crankcase which can damage the crankshaft
sealing ring on the flywheel side causing it to leak oil.
•Pulling off the vacuum supply to the exhaust flaps.
— Modified (negative ) engine power characteristic.
— Increased noise level over the entire rpm range.
•Deleting factory installed exhaust components.
•Replacing factory installed exhaust components with non-approved parts.
Additionally, the correct flywheel for the engine must be used. The incorrect flywheel will not disrupt the vacuum inside the engine however the increased crankshaft vibrations may damage the seal.
06-01-2009, 01:42 PM
#5
Bad analogy:
It is like a craftsman making the most beautiful sounding trumpet ever, then before he delivers it to you he puts on extra mufflers and baffles then blames you for wanting to hear his device that makes that sweet sweet music......?
It is like a craftsman making the most beautiful sounding trumpet ever, then before he delivers it to you he puts on extra mufflers and baffles then blames you for wanting to hear his device that makes that sweet sweet music......?
06-01-2009, 11:53 PM
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3/08 1359 Dated 5/18/2009
Interesting what is addressed:
We have since discovered that a leaking crankshaft sealing ring on the flywheel side can also be caused by a leaking or manipulated1 engine vacuum system.
Important Note — Manipulating the factory installed engine components
The following will disrupt the vacuum conditions in the crankcase which can damage the crankshaft
sealing ring on the flywheel side causing it to leak oil.
•Pulling off the vacuum supply to the exhaust flaps.
— Modified (negative ) engine power characteristic.
— Increased noise level over the entire rpm range.
•Deleting factory installed exhaust components.
•Replacing factory installed exhaust components with non-approved parts.
Additionally, the correct flywheel for the engine must be used. The incorrect flywheel will not disrupt the vacuum inside the engine however the increased crankshaft vibrations may damage the seal.
Interesting what is addressed:
We have since discovered that a leaking crankshaft sealing ring on the flywheel side can also be caused by a leaking or manipulated1 engine vacuum system.
Important Note — Manipulating the factory installed engine components
The following will disrupt the vacuum conditions in the crankcase which can damage the crankshaft
sealing ring on the flywheel side causing it to leak oil.
•Pulling off the vacuum supply to the exhaust flaps.
— Modified (negative ) engine power characteristic.
— Increased noise level over the entire rpm range.
•Deleting factory installed exhaust components.
•Replacing factory installed exhaust components with non-approved parts.
Additionally, the correct flywheel for the engine must be used. The incorrect flywheel will not disrupt the vacuum inside the engine however the increased crankshaft vibrations may damage the seal.
I suspect they can, but I would like to hear what the "techies" have to say.
06-02-2009, 12:17 AM
#7
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Seems so
Read this Thread
All too interesting....
Read this Thread
Check engine light came on last week.
It was no warranty, (Paid for a rental car only.) because I unplugged the plug for the exhasut control, but I did that 7000 mile ago in September last year when I bought the car?
It was no warranty, (Paid for a rental car only.) because I unplugged the plug for the exhasut control, but I did that 7000 mile ago in September last year when I bought the car?
It says on my invoice:
"Tuning flap selenoid disconnected VAL. OBDII performed: DTC P1682 Output stage exh flap control/exh. flap pressure sensor fault no signal/communication"
Seems logical when disconnected, but why no warning sooner? Why no warning now?
"Tuning flap selenoid disconnected VAL. OBDII performed: DTC P1682 Output stage exh flap control/exh. flap pressure sensor fault no signal/communication"
Seems logical when disconnected, but why no warning sooner? Why no warning now?
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06-02-2009, 01:18 AM
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I am over my head on this one, but I wish the "techies' would read the bulletins and chime in.
Not with respect to could or should, but in respect to what is currently measured and monitored by way of the DME. These monitoring activities cut to the quick of the warranty position. Until recently I was thinking that the onus of proof was on Porsche. I would like to hear from knowledgeable sources as to why. My instinct tells me, based upon various articles, that the onus (and expense) of proof is on the consumer. The various technical releases seem to be a well thought out approach to combating some of the current issues; and make it very apparent (to me) that PCNA has a very active handle on the ongoing mods and their related impact.
Not with respect to could or should, but in respect to what is currently measured and monitored by way of the DME. These monitoring activities cut to the quick of the warranty position. Until recently I was thinking that the onus of proof was on Porsche. I would like to hear from knowledgeable sources as to why. My instinct tells me, based upon various articles, that the onus (and expense) of proof is on the consumer. The various technical releases seem to be a well thought out approach to combating some of the current issues; and make it very apparent (to me) that PCNA has a very active handle on the ongoing mods and their related impact.
06-02-2009, 11:33 AM
#11
Burning Brakes
It's my understanding that Porsche dealers were installing the pulley along with the LWF.
I think the issue goes back to balancing from the factory. Perhaps adding a LWF to the mix requires certain balancing that is done while the engine is on a jig in the factory but can't be reproduced in a shop??
Just talking out of my *** here but I wonder why you cannot swap a LWF in a 997 GT3, but you can in a 996 GT3? Hell, I even put in an RS clutch on my 993 C2S and have about 10k (HARD) track miles on that car and have zero issues.
I'm thinking the engine is pretty on edge in the 3.6/997 form and balancing is a major concern with the high rev limit and expensive internals on the car. Will be interesting to see what Porsche has to say about fitting a LWF on the 997.2 GT3?
I think the issue goes back to balancing from the factory. Perhaps adding a LWF to the mix requires certain balancing that is done while the engine is on a jig in the factory but can't be reproduced in a shop??
Just talking out of my *** here but I wonder why you cannot swap a LWF in a 997 GT3, but you can in a 996 GT3? Hell, I even put in an RS clutch on my 993 C2S and have about 10k (HARD) track miles on that car and have zero issues.
I'm thinking the engine is pretty on edge in the 3.6/997 form and balancing is a major concern with the high rev limit and expensive internals on the car. Will be interesting to see what Porsche has to say about fitting a LWF on the 997.2 GT3?
06-02-2009, 01:47 PM
#12
I think the issue goes back to balancing from the factory. Perhaps adding a LWF to the mix requires certain balancing that is done while the engine is on a jig in the factory but can't be reproduced in a shop??
Just talking out of my *** here but I wonder why you cannot swap a LWF in a 997 GT3, but you can in a 996 GT3?
Just talking out of my *** here but I wonder why you cannot swap a LWF in a 997 GT3, but you can in a 996 GT3?
As for 997.2, well, according to Excellence magazine, stock crank has been shot peened this time around, obviously due to larger displacement. I would be surprised if Porsche still doesn't allow fitting LWF to this model.
06-02-2009, 03:16 PM
#15
