997.2 GT3 disturbing rattle on start up
Discussion
OK I might be a little paranoid having just changed from a mk1 to mk2 GT3 and I have alway been sensitive to noises (of which there a plenty in a GT3) etc
Tonight I started up my 3.8 and there was a reasonably load "rattle" for about 3 seconds (sounded a bit like a car where first or reverse had not been selected properly and the clutch let out). I can only think it was the dry sump system getting back up to pressure but I never heard anything like that from my 3.6 GT3. Plenty of warranty so no issue there but can anybody shed any light,
1st few days have been eventful, clutch smells if manouvering at low speeds and climate control is jammed on 21°C and I can only adjust the fan speed from off to 1/2 speed, still the rest of it is just superb, once we iron out these small issues it will all be fine
Tonight I started up my 3.8 and there was a reasonably load "rattle" for about 3 seconds (sounded a bit like a car where first or reverse had not been selected properly and the clutch let out). I can only think it was the dry sump system getting back up to pressure but I never heard anything like that from my 3.6 GT3. Plenty of warranty so no issue there but can anybody shed any light,
1st few days have been eventful, clutch smells if manouvering at low speeds and climate control is jammed on 21°C and I can only adjust the fan speed from off to 1/2 speed, still the rest of it is just superb, once we iron out these small issues it will all be fine
LindsayMac said:
OK I might be a little paranoid having just changed from a mk1 to mk2 GT3 and I have alway been sensitive to noises (of which there a plenty in a GT3) etc
Tonight I started up my 3.8 and there was a reasonably load "rattle" for about 3 seconds (sounded a bit like a car where first or reverse had not been selected properly and the clutch let out). I can only think it was the dry sump system getting back up to pressure but I never heard anything like that from my 3.6 GT3. Plenty of warranty so no issue there but can anybody shed any light,
1st few days have been eventful, clutch smells if manouvering at low speeds and climate control is jammed on 21°C and I can only adjust the fan speed from off to 1/2 speed, still the rest of it is just superb, once we iron out these small issues it will all be fine
Don't worry it's fine, it's just the normal 'death rattle' sound, nothing to worry about.Tonight I started up my 3.8 and there was a reasonably load "rattle" for about 3 seconds (sounded a bit like a car where first or reverse had not been selected properly and the clutch let out). I can only think it was the dry sump system getting back up to pressure but I never heard anything like that from my 3.6 GT3. Plenty of warranty so no issue there but can anybody shed any light,
1st few days have been eventful, clutch smells if manouvering at low speeds and climate control is jammed on 21°C and I can only adjust the fan speed from off to 1/2 speed, still the rest of it is just superb, once we iron out these small issues it will all be fine
Do a google search for GT3 strange start up sound and fill ya boots!
No clutch bedding in procedure I'm aware of. The thing will bed in soon enough under normal use.
If the clutch is getting hot enough to stink I do not think it is a bedding in needed I think you are slipping the clutch too much.
I have not driven that model of Porsche but both my 02 Boxster and my 03 Turbo will move away from a stop on dead level ground with my just letting the clutch out at engine idle, albeit a bit slower than I would let it out normally which I up the RPMs to around 1K and then release the gas pedal concurrent with letting the clutch out.
This (among other good clutch habits) leads to long clutch life. The 02 Boxster's clutch is going to get to 275K miles in a few hundred miles. The Turbo clutch is up to 114K miles and a RMS repair a few month back found the clutch disc with essentially no wear.
If the clutch is getting hot enough to stink I do not think it is a bedding in needed I think you are slipping the clutch too much.
I have not driven that model of Porsche but both my 02 Boxster and my 03 Turbo will move away from a stop on dead level ground with my just letting the clutch out at engine idle, albeit a bit slower than I would let it out normally which I up the RPMs to around 1K and then release the gas pedal concurrent with letting the clutch out.
This (among other good clutch habits) leads to long clutch life. The 02 Boxster's clutch is going to get to 275K miles in a few hundred miles. The Turbo clutch is up to 114K miles and a RMS repair a few month back found the clutch disc with essentially no wear.
Rockster said:
No clutch bedding in procedure I'm aware of. The thing will bed in soon enough under normal use.
If the clutch is getting hot enough to stink I do not think it is a bedding in needed I think you are slipping the clutch too much.
I have not driven that model of Porsche but both my 02 Boxster and my 03 Turbo will move away from a stop on dead level ground with my just letting the clutch out at engine idle, albeit a bit slower than I would let it out normally which I up the RPMs to around 1K and then release the gas pedal concurrent with letting the clutch out.
This (among other good clutch habits) leads to long clutch life. The 02 Boxster's clutch is going to get to 275K miles in a few hundred miles. The Turbo clutch is up to 114K miles and a RMS repair a few month back found the clutch disc with essentially no wear.
Not sure what Porsche (LUK ?) are using in their clutch lining these days, but they do smell a lot when new. I had a factory LWT flywheel and new clutch fitted to my 996 GT3 earlier in the year. After a few days I took it back and said there must be something wrong with it as it smelt so much. I too was told it's "normal" with a new clutch these days.If the clutch is getting hot enough to stink I do not think it is a bedding in needed I think you are slipping the clutch too much.
I have not driven that model of Porsche but both my 02 Boxster and my 03 Turbo will move away from a stop on dead level ground with my just letting the clutch out at engine idle, albeit a bit slower than I would let it out normally which I up the RPMs to around 1K and then release the gas pedal concurrent with letting the clutch out.
This (among other good clutch habits) leads to long clutch life. The 02 Boxster's clutch is going to get to 275K miles in a few hundred miles. The Turbo clutch is up to 114K miles and a RMS repair a few month back found the clutch disc with essentially no wear.
It's somewhat disconcerting as the slightest mismatch between accelerator and clutch when moving off makes the clutch emit a heavy "burnt clutch" smell.
Rest assured it will disappear with use ! ! All you are doing is burning off/baking the resins that bond the linings together.
Smoke on start up seems to be a real peculiarity of the 997 GT3. The Cups don't do it, my 996 GT3 version NEVER does it (neither have the other two 996 GT3's I've owned)
The same can't be said of the 996 GT3 when it comes to start up rattles however . . .
Two out of the three 996 GT3's I've owned have done it, as did my two Gen 1 997 GT3's, most Mk1's do it (though again my current 996 NEVER does it)
Not slipping the clutch, I did 13000 miles in my last GT3 with no issue, track work included. With your method of clutch control will likely stall a GT3, clutch on these cars are very heavy and snatch up quickly
Rockster said:
No clutch bedding in procedure I'm aware of. The thing will bed in soon enough under normal use.
If the clutch is getting hot enough to stink I do not think it is a bedding in needed I think you are slipping the clutch too much.
I have not driven that model of Porsche but both my 02 Boxster and my 03 Turbo will move away from a stop on dead level ground with my just letting the clutch out at engine idle, albeit a bit slower than I would let it out normally which I up the RPMs to around 1K and then release the gas pedal concurrent with letting the clutch out.
This (among other good clutch habits) leads to long clutch life. The 02 Boxster's clutch is going to get to 275K miles in a few hundred miles. The Turbo clutch is up to 114K miles and a RMS repair a few month back found the clutch disc with essentially no wear.
If the clutch is getting hot enough to stink I do not think it is a bedding in needed I think you are slipping the clutch too much.
I have not driven that model of Porsche but both my 02 Boxster and my 03 Turbo will move away from a stop on dead level ground with my just letting the clutch out at engine idle, albeit a bit slower than I would let it out normally which I up the RPMs to around 1K and then release the gas pedal concurrent with letting the clutch out.
This (among other good clutch habits) leads to long clutch life. The 02 Boxster's clutch is going to get to 275K miles in a few hundred miles. The Turbo clutch is up to 114K miles and a RMS repair a few month back found the clutch disc with essentially no wear.
Thanks, I have been treating it as if its made of glass and there is no smell, time to give it the beans I think. Sounds like I am experiencing exactly what you have seen.
Slippydiff said:
Not sure what Porsche (LUK ?) are using in their clutch lining these days, but they do smell a lot when new. I had a factory LWT flywheel and new clutch fitted to my 996 GT3 earlier in the year. After a few days I took it back and said there must be something wrong with it as it smelt so much. I too was told it's "normal" with a new clutch these days.
It's somewhat disconcerting as the slightest mismatch between accelerator and clutch when moving off makes the clutch emit a heavy "burnt clutch" smell.
Rest assured it will disappear with use ! ! All you are doing is burning off/baking the resins that bond the linings together.
Smoke on start up seems to be a real peculiarity of the 997 GT3. The Cups don't do it, my 996 GT3 version NEVER does it (neither have the other two 996 GT3's I've owned)
The same can't be said of the 996 GT3 when it comes to start up rattles however . . .
Two out of the three 996 GT3's I've owned have done it, as did my two Gen 1 997 GT3's, most Mk1's do it (though again my current 996 NEVER does it)
It's somewhat disconcerting as the slightest mismatch between accelerator and clutch when moving off makes the clutch emit a heavy "burnt clutch" smell.
Rest assured it will disappear with use ! ! All you are doing is burning off/baking the resins that bond the linings together.
Smoke on start up seems to be a real peculiarity of the 997 GT3. The Cups don't do it, my 996 GT3 version NEVER does it (neither have the other two 996 GT3's I've owned)
The same can't be said of the 996 GT3 when it comes to start up rattles however . . .
Two out of the three 996 GT3's I've owned have done it, as did my two Gen 1 997 GT3's, most Mk1's do it (though again my current 996 NEVER does it)
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