GT3RS Gen 2 3.8 & 4.0 engine problems
Discussion
Does anyone know the score on this?
It seems to be being hushed up, but in a short period of time over ten 4.0RS's have gone pop, and apparently 3.8's are affected too. There was some talk about some flap becoming detached and going into the engine, but I don't know anymore than this.
Apparently, a lot of people have been told to park up their Gen2 and not use until further notice??
And.... no this isn't some sort of sicko wind-up, its a genuine problem that needs to be got to the bottom of.
It seems to be being hushed up, but in a short period of time over ten 4.0RS's have gone pop, and apparently 3.8's are affected too. There was some talk about some flap becoming detached and going into the engine, but I don't know anymore than this.
Apparently, a lot of people have been told to park up their Gen2 and not use until further notice??
And.... no this isn't some sort of sicko wind-up, its a genuine problem that needs to be got to the bottom of.
Not sure if this is the same thing but over on Teamspeed....
http://teamspeed.com/forums/gt/75116-gt3-rs-4-0-pr...
http://teamspeed.com/forums/gt/75116-gt3-rs-4-0-pr...
the 997.1 certainly wouldnt be anything to do with the fact that porsche said they were using an "improved" longer and thinner connecting rod with a smaller diameter wrist pin (131.5mm/21mm) in the engines to further save weight, giving this a new and unique 997 part number.
a spec that wasnt used in the 997 Cup engines which instead stuck with the rod and wrist pin dimensions used in the 996.2 GT3 and 996 Cup (130mm/22mm) and using a 996 part number.
it would also be a complete coincidence that this "improved" rod was superseded from its original 997 part number after release to a new 996 part number before being superseded again to the 996 part number used for the connecting rods on the 996.2GT3, 996 Cup and 997 Cup 3.6L.
that this change in PN would mean that the comnecting rods also changed in spec back to the original length and wrist pin diameter from this new spec, all without a mention to anyone is merely a footnote.
fwiw, the only 997.2 problems ive seen anything about are to do with the clutch pressure plates failing (warranty) and wheels falling off (no warranty). that porsche has done seemingly nothing at all on the wheels would seem to rule out them suddenly rushing into action for some engine issue telling owners not to move their cars- unless ofcourse it would be harder to deny warranty for an engine popping than a wheel falling off and they were going to have to pick up a lot of tabs.
IMHO for any issue plan on the solution chosen as being whatever is cheapest. placing fingers into your ears while closing your eyes is pretty cheap.
a spec that wasnt used in the 997 Cup engines which instead stuck with the rod and wrist pin dimensions used in the 996.2 GT3 and 996 Cup (130mm/22mm) and using a 996 part number.
it would also be a complete coincidence that this "improved" rod was superseded from its original 997 part number after release to a new 996 part number before being superseded again to the 996 part number used for the connecting rods on the 996.2GT3, 996 Cup and 997 Cup 3.6L.
that this change in PN would mean that the comnecting rods also changed in spec back to the original length and wrist pin diameter from this new spec, all without a mention to anyone is merely a footnote.
fwiw, the only 997.2 problems ive seen anything about are to do with the clutch pressure plates failing (warranty) and wheels falling off (no warranty). that porsche has done seemingly nothing at all on the wheels would seem to rule out them suddenly rushing into action for some engine issue telling owners not to move their cars- unless ofcourse it would be harder to deny warranty for an engine popping than a wheel falling off and they were going to have to pick up a lot of tabs.
IMHO for any issue plan on the solution chosen as being whatever is cheapest. placing fingers into your ears while closing your eyes is pretty cheap.
Edited by fioran0 on Saturday 6th October 02:07
fioran0 said:
the 997.1 certainly wouldnt be anything to do with the fact that porsche said they were using an "improved" longer and thinner connecting rod with a smaller diameter wrist pin (131.5mm/21mm) in the engines to further save weight, giving this a new and unique 997 part number.
a spec that wasnt used in the 997 Cup engines which instead stuck with the rod and wrist pin dimensions used in the 996.2 GT3 and 996 Cup (130mm/22mm) and using a 996 part number.
it would also be a complete coincidence that this "improved" rod was superseded from its original 997 part number after release to a new 996 part number before being superseded again to the 996 part number used for the connecting rods on the 996.2GT3, 996 Cup and 997 Cup 3.6L.
that this change in PN would mean that the comnecting rods also changed in spec back to the original length and wrist pin diameter from this new spec, all without a mention to anyone is merely a footnote.
fwiw, the only 997.2 problems ive seen anything about are to do with the clutch pressure plates failing (warranty) and wheels falling off (no warranty). that porsche has done seemingly nothing at all on the wheels would seem to rule out them suddenly rushing into action for some engine issue telling owners not to move their cars- unless ofcourse it would be harder to deny warranty for an engine popping than a wheel falling off and they were going to have to pick up a lot of tabs.
IMHO for any issue plan on the solution chosen as being whatever is cheapest. placing fingers into your ears while closing your eyes is pretty cheap.
There was a recall on the wheels - I had it and they replaced the centre lock hubs.
a spec that wasnt used in the 997 Cup engines which instead stuck with the rod and wrist pin dimensions used in the 996.2 GT3 and 996 Cup (130mm/22mm) and using a 996 part number.
it would also be a complete coincidence that this "improved" rod was superseded from its original 997 part number after release to a new 996 part number before being superseded again to the 996 part number used for the connecting rods on the 996.2GT3, 996 Cup and 997 Cup 3.6L.
that this change in PN would mean that the comnecting rods also changed in spec back to the original length and wrist pin diameter from this new spec, all without a mention to anyone is merely a footnote.
fwiw, the only 997.2 problems ive seen anything about are to do with the clutch pressure plates failing (warranty) and wheels falling off (no warranty). that porsche has done seemingly nothing at all on the wheels would seem to rule out them suddenly rushing into action for some engine issue telling owners not to move their cars- unless ofcourse it would be harder to deny warranty for an engine popping than a wheel falling off and they were going to have to pick up a lot of tabs.
IMHO for any issue plan on the solution chosen as being whatever is cheapest. placing fingers into your ears while closing your eyes is pretty cheap.
There was a recall on the wheels - I had it and they replaced the centre lock hubs.
Edited by fioran0 on Saturday 6th October 02:07
Apologies for not being clearer. I was commenting on what id seen/heard of as being 997.2 problems and so meant the wheels that have been physically falling off rather than the recall carried out after the torque spec for the wheel nuts was updated.
It seems that warranty has been denied in the cases of falling off wheels, even though some cars have experienced significant damage as a result.
Numbers are of course small and cause unknown, it may be user error but there's a risk to life with this and with reference to the original post in this thread, no grounding of cars requested pending investigation was made.
For info though, the recall for the wheels that took place simply changed the original nuts (carrying a printed torque rating) for nuts now minus the torque rating print. The nut design wasnt changed.
The reason for this was that an increased torque spec was to be used going forward and the original nuts now clearly carried the old torque value. The original value specified was allowing the wheels in some cases to gouge the hub surface and drive pins.
While any hubs showing marks from gouging were also to be replaced at the time of the nut change, there was no change to design on these either. All hubs parts remained the same.
The update thus consisted of the same nut, now without text being tightened more. Those that had already experienced parts wear prior to the update had their worn parts replaced with the same parts but new.
It seems that warranty has been denied in the cases of falling off wheels, even though some cars have experienced significant damage as a result.
Numbers are of course small and cause unknown, it may be user error but there's a risk to life with this and with reference to the original post in this thread, no grounding of cars requested pending investigation was made.
For info though, the recall for the wheels that took place simply changed the original nuts (carrying a printed torque rating) for nuts now minus the torque rating print. The nut design wasnt changed.
The reason for this was that an increased torque spec was to be used going forward and the original nuts now clearly carried the old torque value. The original value specified was allowing the wheels in some cases to gouge the hub surface and drive pins.
While any hubs showing marks from gouging were also to be replaced at the time of the nut change, there was no change to design on these either. All hubs parts remained the same.
The update thus consisted of the same nut, now without text being tightened more. Those that had already experienced parts wear prior to the update had their worn parts replaced with the same parts but new.
Edited by fioran0 on Saturday 6th October 11:21
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