Originally Posted by sharkster

The engine in the video is from a 997tt so it wasn't fixed and indeed it's surprising that they didn't;(

Originally Posted by Serge944

If you go with a LWFW on a turbo, you have to bypass the hydraulic booster off the power steering and go with a GT3 clutch slave cylinder. I've driven turbos with the stock clutch hydraulics and LWFW and it really sucks. Sure, you can get used to it, but the pedal feel is awful.

Originally Posted by sharkster

We don't just build GT3 engines here... but this is seriously the stuff that keeps James awake at night! If any of you guys also have either a 996 or 997 GT1 based Twin Turbo and are experiencing more engine vibration/noise than you'd think was normal we've unfortunately seen our fair share of this nasty symptom. It's not the same IMS failure you here/read about on the M96/97 engines (that is more common too).

http://www.youtube.com/watch?v=S6UF5qEW0iE&feature=plcp

How many degrees of play in that crank shaft?!?! At first you won't even get any check engine lights/codes either. This type of set up is in all the 996/997TT GT1 engines but luckily NOT I repeat NOT in our GT3s- phew. One has to wonder why... The only other thing I can say is of the turbo engines we've seen with this failure there seems to be a correlation of a light weight flywheel into play as well which _could_ be exacerbate the problem due to additional transmitted vibration.

To check for this if you're worried you can rotate the crank shaft back and forth and it it feels loose at all then the next step is to remove the driver's side upper cam cover and observe the relation between the crank shaft movement and the cam shaft movement. Obviously you want to nip this in the bud before it gets bad and leads to a total catastrophic failure.

The noise is most noticeable at idle and when gently increasing the revs to 2000 and then releasing the throttle pedal. It's kind of frustrating that the Turbos don't have the same design as the GT3 but there you have it (or hopefully not!).

Originally Posted by F1CrazyDriver

Hmmm I think. Here me out; most Porsche owners lug their motor. Which is incredibly bad for the crank on a flat 6 motor, and having a lwfw makes it even worse. I was told by my good friend who owns an older 911, that always keep the RPM's above 3,000 when the engine is warm, always- since before i acquired my car 6 + years ago, and he let me drive his car. I read in the 996 T manual that Porsche states the same. I HIGHLY doubt 95% of the owners out there do this ( this includes GT2's /GT3's) . Specially the Turbo owners, as lets face it, most don't drive a Porsche properly IMO, which looks to be more prone.

Originally Posted by sharkster

Just wanted to re-iterate for those of you with turbos; I wouldn't get overly concerned by this and let me again re-state... it's a rare issue but certainly a strange and avoidable one I feel. Especially by the time the 997TT came around Porsche already had the GT3 set up figured out. I think with more miles and as I was saying in the original post, with a LWF, it seems to have accelerated the issue more. Has this happened lot's? Not really... It's just avoidable like the coolant pipe issue. I put it out there for people who are building their engines (modifications or not) to just go basically dot a couple more i's and cross a few t's while they're in there. A bone stock TT with a stock dual mass flywheel I would imagine it being rare but not unheard of. I've seen only 8 TT's here with that problem over the years. I know EVOMS builds a lot more TT motors than we do and they've seen more than us. If you search on the forums though you'll see that there are a few others who have suffered from this failure in the past. The good thing is you can hear it and address it before it gets too bad as well.

Mezger engine is my favorite of all time. No doubt. It's an amazing mixture of tried and tested parts. Are there things that have been overlooked due to cost or neglect? Sure. Could it be better? Sure.

Originally Posted by F1CrazyDriver

I think the GT3 crowed is the only few whom are not afraid of beating the **** out of their cars on daily basis

Originally Posted by fc-racer

I'm now at five years with my GT3 and it drives better the harder I push it. When I think I'm beating the **** to of it, the car just laughs at me and says "Really? Is this all you've got? Amateur!"