Engine "Event" Nicht so Gut
05-26-2011, 05:29 AM
#32
Three Wheelin'
When you think about it the only time there is oil going to this cam housing is when the cam advance solenoid is activated. I hope Porsche did something to provide a minimum of lubrication in this area when the advance is not triggered....
05-27-2011, 11:46 PM
#33
Race Director
I wouldn't use the phrase "pressed on" As techs we don't walk over to the 20 ton hydraulic press and fit the components. Part number 7 "housing" fits over the three oil control sealing rings > on the intake camshaft. The housing is bolted to the camshaft housing. It does have two oil supply holes. It also supplies oil to the Vario-cam module> which is designed to advance the camshaft.
If PorscheDoc sees this I would ask him to check the alignment of the "housing" I wonder if Porsche has missed a oil passage in the cam-housing by mistake (did not drill it).
Macster, if you can print out the screenshot and ask the tech>> number 7 is the part in which I believe is the problem. Can you ask him if there is any "internal memo" that is circulating prior to this getting more formal.
If PorscheDoc sees this I would ask him to check the alignment of the "housing" I wonder if Porsche has missed a oil passage in the cam-housing by mistake (did not drill it).
Macster, if you can print out the screenshot and ask the tech>> number 7 is the part in which I believe is the problem. Can you ask him if there is any "internal memo" that is circulating prior to this getting more formal.
He did not know what was wrong internally as he had not torn it apart. It is not a servicable item.
I asked him about the sleeve. It is pressed inside the nose of the cam.
There were no pics or drawings in any of the documentation he or the parts manager had available.
The sleeve has something to do with the oil flow into the actuator. The inside of the actuator has what I guess can only be oil holes.
Here's the pic that shows these holes:
Oh, there is no TSB or anything like that on this sleeve business either.
Sincerely,
Macster.
05-28-2011, 02:05 PM
#34
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Macster the components that you are being shown are NOT from the 996TT engine. The techs are taking you snipe hunting. I will take a picture of the correct 996TT intake and vario-cam system. There are ZERO sleeves attached to the vario-cam module or intake camshaft.
05-28-2011, 08:58 PM
#35
Race Director
That's where that actuator I pictured above came from. In fact this is it before it was removed from the engine.
As for snipe hunting, the tech I've been talking to has never done that before to me and I don't feel he's doing it now.
Sincerely,
Macster.
05-28-2011, 09:49 PM
#36
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That is not a 996TT engine. That looks like a 997TT.1 Do you see the watercooling pipe coming down the right side of the picture>>cools the VTG bearing housing.
The vario-cam modules are completely different >> 996TT vs 997TT.
The vario-cam modules are completely different >> 996TT vs 997TT.
05-28-2011, 10:00 PM
#37
Race Director
Still, didn't Porsche use the 996 Turbo engine in the 997 Turbo for a few years before switching to the new DFI engine?
Anyhow, sorry for the confusion.
Sincerely,
Macster.
06-29-2011, 09:36 AM
#41
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So, if I was standing near a 997.1TT and someone said "didn't Porsche use the 996 Turbo engine in these" - the answer is "not really, no - but they're similar." IMHO.
07-03-2011, 08:04 PM
#42
Race Director
AFAIK, depends on how you define "engine" ... the basic design and architecture is still derived from the GT1 Mezger motor for the 997.1TT engine, so they share that similarity, but much of the hardware was changed/updated in the process of the model/chassis change. Different compression ratio, different intake manifolds, different fueling system, VTG turbos, different intercoolers, etc etc.
So, if I was standing near a 997.1TT and someone said "didn't Porsche use the 996 Turbo engine in these" - the answer is "not really, no - but they're similar." IMHO.
So, if I was standing near a 997.1TT and someone said "didn't Porsche use the 996 Turbo engine in these" - the answer is "not really, no - but they're similar." IMHO.
Sincerely,
Macster.
12-16-2014, 10:34 AM
#43
Nordschleife Master
^ Interesting, check on the 997tt forum and guess what is causing problems on 997.1tt, the
camshaft sleeve
Not sure how big of an issue this will be in the future but own my search for a 997.1tt may be replaced with something else unless there is something that can be done preventativly and not too costly.
camshaft sleeve
Not sure how big of an issue this will be in the future but own my search for a 997.1tt may be replaced with something else unless there is something that can be done preventativly and not too costly.
