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Why would porsche stand behind and cover an over-rev? that would seem the easiest type of claim to deny? they could point to the data and say "look
there are X-amount of type-whatever over-revs. clear evidence of driver error & abuse...denied, here is your bill"
I hope for the OP sakes that's not what happened but it seems a plausible explanation.
Why? Because they're Porsche and because they care about their customers. I know of several instances where Porsche replaced entire engines under warranty for customers who blew downshifts during track events. We are still speculating on this one, so lets see what they find out.
One thing is for sure. If you lie to or mislead the dealer in any way, they are NOT going to stand behind you. Be honest and reasonable.
Why? Because they're Porsche and because they care about their customers. I know of several instances where Porsche replaced entire engines under warranty for customers who blew downshifts during track events. We are still speculating on this one, so lets see what they find out.
wait..porsche, the same company who says if you wanna track your car get a GT3, or turbo..gives mulligans on driver error for track driven cars? man, please point me to a thread on this or any forum, that shows an example where porsche proved an engine failure occured due to driver caused over-rev, and they replaced the engine anyway. why stop there. i crashed my CS at the downhill at LRP cause i thought i could take it flat. if porsche cares about me they will replace the car? Do cup cars come with warranties to?
Do you honestly think a customer deserves a new engine if they take their car to the track and they blow it up on a bad downshift? I track my car & I don't. You better believe i would try to get one under warranty, but if i was denied i would take my lumps (albeit a very expensive, painful one). You have to pay to play, and dont track your car (or get track insurance) if you are not prepared to write the entire thing off. Also, that motor is not free. that replacement cost for a new engine is absorbed in and eventually gets passed downstream to the consumer.
As a matter of official policy Porsche isn't going to pay for your mistakes.
But...if a dealership can squeak through a warranty claim because THEY LIKE YOU...and a reasonable case can be made...it can happen.
Let's hope our clubmate catches a lucky break. He isn't entitled to anything, of course, if it is the result of user error. But if a reasonable case can be made that this would have happened on the street, and the dealership is friendly...who knows?
A loud explosive bang followed by a stalled engine
The engine restarted and was able to idle but it kept backfiring
Metallic sound on restart
At first I was thinking about a broken intermediate shaft, which could throw cams out of time and cause some nasty backfires into the intake manifold. But being able to restart the engine rules this out.
A backfire into the exhaust wouldn't have shaken your car like that. A backfire into the intake manifold certainly could. And if it did backfire into the intake, it would probably blow off and/or destroy an intake hose. If that happened, it is conceivable that the engine could start and limp a little.
Is there any chance you downshifted into the wrong gear? Based on the circumstances, it sort of sounds like you may have grabbed a wrong gear, over-revved the engine and smacked a valve with a piston. Because you have a light weight flywheel, this could happen very quickly without you even realizing you grabbed the wrong gear.
If this happened, that smacked valve would stay open (because the stem would be bent). If it were an intake valve, that would cause some explosive backfires into the intake manifold. That would also cause the engine to stumble, skip, display a CEL and emit a very nasty metallic banging noise.
I hope I'm wrong, because if I am not your engine is toast. Even if I am correct, I am pretty sure that Porsche would stand behind it and cover it under warranty, so don't panic yet.
This will indeed be a very good test of the Porsche warranty. I suspect that Porsche will pleasantly surprise us all. Please keep us posted.
I think I can discount the over rev possibility, because I had just taken the checkered flag (session over) and instead of wailing along in 4th I had upshifted to 5th and then 6th, but I hadn't yet scrubbed any speed off, so the revs were fairly low for 140kms/hr (90mph approx). The KABOOM happened just I was about to brake, so it didn't actually happen during braking. Sorry if I wasn't clear about this previously.
It looks like the dealership can get my CS in this afternoon, so I might get an update (but not the car) before the weekend. They did say though that they were able to start the car (with some difficulty), but would offer no other thoughts until they can get it inside and open things up. I asked again about the earlier coil failure/cog jump suggestion and they seem to be backing away from that theory now. I'll take that as positive - but no point speculating until they can do their thing.
I anxiously await their call .......
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'04 GT3 - track car
'06 Cayman S - (semi) retired track car
'07 Grand Cherokee SRT8 - everything else
Regarding Over-revs and engine damage, then what in the world is a rev limiter for? Or perhaps you increased your rev limiter with the Softronic software?
Softronic
SOFTRONIC produces DME programming and hardware to suit your companies specifications. Our current software suite is a complex matched set of programs housed in a Flash Manager and Flash Client. This software is matched with two cables, an End User and Master Cable. The SOFTRONIC proprietary flashing solution outperforms all other combinations in speed and accuracy including the factory Porsche equipment.
Regarding Over-revs and engine damage, then what in the world is a rev limiter for? Or perhaps you increased your rev limiter with the Softronic software?
The rev limiter only protects you on acceleration - it doesn't protect against over-revs if you force a downshift to too low of a gear.
__________________ My Blogs
2006 CS Tip (Daily Driver & Part-time Track Toy)
2005 Ford Expedition (to haul the CS)
2006 Lexus RX400h (wifey's)
Gone, but not forgotten: 2002 WRX, 2004 MINI
wait..porsche, the same company who says if you wanna track your car get a GT3, or turbo..gives mulligans on driver error for track driven cars? man, please point me to a thread on this or any forum, that shows an example where porsche proved an engine failure occured due to driver caused over-rev, and they replaced the engine anyway. why stop there. i crashed my CS at the downhill at LRP cause i thought i could take it flat. if porsche cares about me they will replace the car? Do cup cars come with warranties to?
Do you honestly think a customer deserves a new engine if they take their car to the track and they blow it up on a bad downshift? I track my car & I don't. You better believe i would try to get one under warranty, but if i was denied i would take my lumps (albeit a very expensive, painful one). You have to pay to play, and dont track your car (or get track insurance) if you are not prepared to write the entire thing off. Also, that motor is not free. that replacement cost for a new engine is absorbed in and eventually gets passed downstream to the consumer.
Woah... Slow down fella. Sounds like you're getting a little fired up on this.
I don't recall saying that he deserved a mulligan, that Porsche should cover an over-rev or anything like that. I assume your computer is capable of taking you to my earlier posts, so I see no need to repeat myself.
You will not find a thread documenting my claim, but I personally know of a 911 Turbo owner who miss-downshifted during a DE, ate the valves and was given a new engine under warranty. Now maybe Porsche looks at 911 Turbo owners a little differently than Cayman owners, but based on my knowledge of this good faith customer satisfaction move on Porsche's part, I was simply saying:
Quote:
I hope I'm wrong, because if I am not your engine is toast. Even if I am correct, I am pretty sure that Porsche would stand behind it and cover it under warranty, so don't panic yet.
This will indeed be a very good test of the Porsche warranty. I suspect that Porsche will pleasantly surprise us all. Please keep us posted.
Quote:
Originally Posted by boobernackle
Regarding Over-revs and engine damage, then what in the world is a rev limiter for? Or perhaps you increased your rev limiter with the Softronic software?
As stated, the rev limiter only prevents the 'gas pedal' from causing an over rev. Stick a car in the wrong gear while it's moving and the wheels will make the engine over rev and there's nothing the computer can do to prevent it.
As stated, the rev limiter only prevents the 'gas pedal' from causing an over rev. Stick a car in the wrong gear while it's moving and the wheels will make the engine over rev and there's nothing the computer can do to prevent it.
Technically IMHO, the computer can prevent that, if the PSM can brake certain wheels to maintain traction, it (or another subsystem) can brake the wheels to avoid over-revs. Or at least reduce it, because maybe by the time it brakes the wheels, a second or so will have passed. Still, I think this might lead to more serious problems than an over-revved engine would, so that's probably why it doesnt do that!!
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"Sir! We're surrounded!" - "Excellent! We can shoot in any direction!"
A good car will get you from point A to point B. A great car... will just get you into trouble!
PSM - Porsche Stability Management
While it can’t overcome the laws of physics, the revolutionary Porsche Stability Management (PSM) system does lend an added degree of balance and control to the Cayman’s mid-engine driving dynamics, inspiring surefooted confidence in corners and extreme situations.
A standard feature on the Cayman and Cayman S, PSM continuously monitors steering input, road speed, yaw velocity and lateral acceleration to calculate the actual direction of travel. If the car begins to steer off line, PSM instantly intervenes with precision brake inputs on individual wheels to help bring the car back onto the driver’s intended path.
If braking alone isn’t enough to correct the vehicle’s cornering line, PSM then calls on the Cayman’s engine management system, adjusting engine output as needed to help stabilize handling. PSM can also compensate in an instant for mid-corner changes in load resulting from deceleration or braking. When Sport mode is selected with the optional Sport Chrono Package, PSM’s threshold for intervention is raised, allowing for greater driver involvement. If you prefer driving without automatic PSM assistance, the system can be set to standby at any time. In this case, it will only intervene under heavy braking, where both front wheels exceed the ABS threshold.
For all of its technical ability, PSM goes virtually unnoticed in everyday driving situations, preserving the Cayman’s natural agility.
