you have hte newer larger one, your car is 06.

mid way thorugh the 05 model year (roughly feb 05 and beyond) they did the changeover.

 

mine just failed last week at 45,000KM.

 

You have a single row bearing I think, which replaced the double row in 2000. Sometime in mid 2005 a larger single row bearing was introduced.

 

More details based on engine number

 

Good info. I was incorrect, I thought it was a larger single row after 2005 based on info from the IMSretrofit web site.

 

Since there is some attention here, is there a place, or someone know a link of what the innards look like on the 9a1 engine? Specifically, how are the cams operated on the 9a1 engines, timing chain still or something else?

I ask because in reality, there was an IMS prior to the M96 engine, just the barring on the engine for the IMS was different. In the M96 engine one baearing is oiled from the inside of the engine while the other one is a sealed bearing. The other engines prior to the M96 were both oiled from the inside, correct?

I have tried searching for this information and for some reason it has eluded me.

 

No intermediate shaft, camshaft is driven directly from crank.

That is my understanding, both bearings were pressure lubed on Metzger engines. The IMS Retrofit (Gen 2) replaces the single row bearing with an un-sealed double row bearing. The IMS Solution replaces the sealed bearing with a pressure fed bearing.

Despite the chart above, everything I've read about this says the 2006-08 bearing was a larger single row, but I may be wrong...

 

Hopefully this helps explain. Some of this is photoshopped for the purposes of explanation.

 

Going by this, correct me please if I'm reading wrong, the 9A1 has both cams operating off one timing chain or is that two from the front of the motor, where as the M96 AND M97 engines have one timing change for one bank on the front of the motor and the other chain for the other bank on the back of the motor.

I know this is getting way technical, but I have a hard time finding some of this stuff. I've seen pics of a of the M96/M97. I'm just trying to figure out the differences is all.

It seems that I read somewhere that the M96/M97 had less moving parts than the aircooled engines and the 9a1 has even less than the M96/M97.

Thanks for the information in advance!

Mike

 

sorry to hear about this, what is your vin number/build date?

also are you located in canada?

 

the car should have an official porsche document stating the cost of the car, all options, its vin number, engine number etc etc.

 

2005 997.1 with 40k miles - no failure

 

2004 997 Carrera S 60.000KM no IMS failure, last week i had the old bearing preventive replaced by an updated one. The old bearing was still in perfect condition.

 

It looks like a lot of perfectly good IMS bearings being replaced.... ( perhaps needlessly?)

 

2007 C2 with 76,000 miles - no IMS problem to date. The car is driven hard on the weekends only at this point.