"Spun" Camshaft
01-05-2015, 09:31 AM
#91
Nordschleife Master
They changed the design from the other blocks, my guess to save money by eliminating the housing caps and fasteners. Prior to the sleeve their was a housing that fits over the three oil control sealing rings on the intake camshaft. The housing is bolted to the camshaft housing. It is not pressed on the camshaft as a sleeve. You could see where this sleeve would save money and a few dozen steps in the engine production.
crack starting, on cam housing brackets
01-05-2015, 10:23 AM
#92
Nordschleife Master
They changed the design from the other blocks, my guess to save money by eliminating the housing caps and fasteners. Prior to the sleeve their was a housing that fits over the three oil control sealing rings on the intake camshaft. The housing is bolted to the camshaft housing. It is not pressed on the camshaft as a sleeve. You could see where this sleeve would save money and a few dozen steps in the engine production.
01-05-2015, 11:03 AM
#93
Nordschleife Master
Wish that were true, really haven't seen much of any history of that happening.
930 3.0 Turbo 2629 lbs
930 3.3 Turbo 3036 lbs
964 3.3 Turbo 3234 lbs
964 3.6 Turbo 3241 lbs
993tt 3304 lbs
996tt 3395 lbs
997.1tt 3487 lbs
997.2tt 3461-3571 lbs
991tt 3516 lbs
930 3.0 Turbo 2629 lbs
930 3.3 Turbo 3036 lbs
964 3.3 Turbo 3234 lbs
964 3.6 Turbo 3241 lbs
993tt 3304 lbs
996tt 3395 lbs
997.1tt 3487 lbs
997.2tt 3461-3571 lbs
991tt 3516 lbs
01-05-2015, 11:34 AM
#94
Rennlist Member
Thread Starter
Thanks Jumper, first time I've seen the 996tt set up, it's interesting to see the change. I actually don't blame Porsche for making the change, usually simple is better.
01-05-2015, 02:21 PM
#95
Three Wheelin'
Could it be an oil issue ? US oil with less ZDDP ?
Are any of you with camshaft failure still using the 'apple juice' 0w40 ?
Any Euro Rennlist members here who have had this issue? Please chime in !
01-05-2015, 07:02 PM
#96
Rennlist Member
This thread scares me. Wish I could get an after market warranty for my car!
01-05-2015, 07:35 PM
#98
Rennlist Member
01-05-2015, 07:45 PM
#99
Nordschleife Master
01-05-2015, 08:03 PM
#100
Racer
Join Date: Jan 2014
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Aint that the truth. Reading forums almost makes you want to never buy a car again. Very prevalent on Performance cars but the mundane arent immune.
Coming from a C6Z06 reading the forums made you never want to drive because of the valve guide/head problems. Maybe i was just lucky but it never happened to me.
I think the biggest problem is determining which problems on forums are truly widespread and which arent. For example...
BMW 335: HPFP seemed common
997.1 TT: Clutch slave seems common...coolant pipes ??? Undecided.....spun cam we will see????
997.1 non-turbo: IMS, seemed widespread
Im sure there are others.
Coming from a C6Z06 reading the forums made you never want to drive because of the valve guide/head problems. Maybe i was just lucky but it never happened to me.
I think the biggest problem is determining which problems on forums are truly widespread and which arent. For example...
BMW 335: HPFP seemed common
997.1 TT: Clutch slave seems common...coolant pipes ??? Undecided.....spun cam we will see????
997.1 non-turbo: IMS, seemed widespread
Im sure there are others.
01-06-2015, 06:52 PM
#101
Rennlist Member
I drive every new Porsche I buy much quicker to the 50K miles warranty expiration than to the 4 years.
My theory is, if it's gonna break, better early while it's in warranty, than with 30K miles and warranty expired at 4 years plus whatever Murphy's law says.
That, and I have never regretted not buying an after market warranty.
I am just a data point at 84K miles and zero mechanical problems.
My theory is, if it's gonna break, better early while it's in warranty, than with 30K miles and warranty expired at 4 years plus whatever Murphy's law says.
That, and I have never regretted not buying an after market warranty.
I am just a data point at 84K miles and zero mechanical problems.
01-07-2015, 08:31 AM
#102
I drive every new Porsche I buy much quicker to the 50K miles warranty expiration than to the 4 years.
My theory is, if it's gonna break, better early while it's in warranty, than with 30K miles and warranty expired at 4 years plus whatever Murphy's law says.
That, and I have never regretted not buying an after market warranty.
I am just a data point at 84K miles and zero mechanical problems.
My theory is, if it's gonna break, better early while it's in warranty, than with 30K miles and warranty expired at 4 years plus whatever Murphy's law says.
That, and I have never regretted not buying an after market warranty.
I am just a data point at 84K miles and zero mechanical problems.
Now the snow, salt, and high of -5 degrees today is a different story...
DC
01-07-2015, 03:22 PM
#103
Drifting
Join Date: Jul 2013
Location: Fishtown - Philadelphia
Posts: 2,203
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I drive every new Porsche I buy much quicker to the 50K miles warranty expiration than to the 4 years.
My theory is, if it's gonna break, better early while it's in warranty, than with 30K miles and warranty expired at 4 years plus whatever Murphy's law says.
That, and I have never regretted not buying an after market warranty.
I am just a data point at 84K miles and zero mechanical problems.
My theory is, if it's gonna break, better early while it's in warranty, than with 30K miles and warranty expired at 4 years plus whatever Murphy's law says.
That, and I have never regretted not buying an after market warranty.
I am just a data point at 84K miles and zero mechanical problems.
01-07-2015, 08:46 PM
#104
Race Car
Let's spin this a different direction if you don't mind.
Can someone elaborate on what goes into "pinning" the cams? Are you inserting a dowel and tacking it in place? Is this something that could be done as a preventative measure before they potentially spin? If they haven't already spun could a preventative pinning be done with the cams still in the car by simply lowering the motor, pulling the cam covers and spinning the motor?
Can someone elaborate on what goes into "pinning" the cams? Are you inserting a dowel and tacking it in place? Is this something that could be done as a preventative measure before they potentially spin? If they haven't already spun could a preventative pinning be done with the cams still in the car by simply lowering the motor, pulling the cam covers and spinning the motor?
01-07-2015, 09:07 PM
#105
Rennlist Member
Thread Starter
Let's spin this a different direction if you don't mind.
Can someone elaborate on what goes into "pinning" the cams? Are you inserting a dowel and tacking it in place? Is this something that could be done as a preventative measure before they potentially spin? If they haven't already spun could a preventative pinning be done with the cams still in the car by simply lowering the motor, pulling the cam covers and spinning the motor?
Can someone elaborate on what goes into "pinning" the cams? Are you inserting a dowel and tacking it in place? Is this something that could be done as a preventative measure before they potentially spin? If they haven't already spun could a preventative pinning be done with the cams still in the car by simply lowering the motor, pulling the cam covers and spinning the motor?
I'll have my pinned cams back in a couple weeks and will take pictures. I don't think you could accurately drill through the sleeve and cam and pin it. Not to mention the shrapnel you'd leave behind.