crankcase roll pin

[tony z]

Hi

 

This is probably a stupid question. PET (page 38) specifies a 5 X 12 roll pin (part number 900 095 137 01).  The work shop manual (page 86) specifies no such pin and nor did I see any such pin when the engine was being taken apart. I have a 2003/3.6 litre 996.

 

I presume that  this roll pin isn't needed for my engine ?

 

Thanks

[Loren]

Many times PET shows parts diagrams for multiple models.

To properly use PET to identify parts for your specific car you need to enter your VIN. (This only works with"real" PET at a dealership. Hacked version don't allow parts lookup by VIN.)

[tony z]

Thanks very much Loren.

 

I was using the a PET PDF which was kindly given to me by a guy from Pelican Parts

 

I guess I will have to call the dealer unless someone in Forum knows anything further.

 

I cant see where the roll pin would fit, there simply isnt a 5mm hole in the crankcase or cylinder head surfaces

 

Cheers

[JFP in PA]

12 hours ago, tony z said:

Hi

 

This is probably a stupid question. PET (page 38) specifies a 5 X 12 roll pin (part number 900 095 137 01).  The work shop manual (page 86) specifies no such pin and nor did I see any such pin when the engine was being taken apart. I have a 2003/3.6 litre 996.

 

I presume that  this roll pin isn't needed for my engine ?

 

Thanks

 

It is item number #35 in this diagram (inserts into the deck of the engine case) https://nemigaparts.com/cat_spares/pet/porsche/996/21/101050/

 

Loren may be correct in that not all 3.6L may have used it, which is why the VIN is critical.

[tony z]

Thanks.

 

I tried entering my Vin into the website you provided but as Loren suggested it doesnt work.............So it seems I will have to get advice from a dealership in my area.

[JFP in PA]

These roll pins appeared in several engines, including the 964, 993, and 996 variants, so they should know about them and if they were used in yours. 

[tony z]

Thanks

 

Pelican parts helpfully checked against my VIN and the roll pins are listed. However there are no 5 milimeter diameter holes for the 5X12 roll pin in either the cylinder head or crankcase half in the area indicated by # 35. My engine does however have 2 holes for the 17X18.5 dowel pins (# 11)  on each cylinder head/crankcase half. 

 

I am not sure what to do at this juncture !! 

[tony z]

Hi

 

I obtained the answer from a friend at LN engineering. The attached picture denotes the hole for the 5X12 roll pin. My engine doesnt have the hole even though the VIN/PET says it does.

 

[JFP in PA]

Is it possible your car has a replacement engine?

[tony z]

Hi

 

My engine has M96/ ....then 10 digits. The first five digits align with the Porsche documentation that came with the car.. I presume the remaining 5 digits are for the transmission ?

 

On another matter the work shop manual says that bolts # 7, 8 and 9 (https://nemigaparts.com/cat_spares/pet/porsche/996/21/101050/) are not supposed to be torqued until the both cylinder heads are torqued.  The manual later on says that bolt # 7 must be torqued before the 4 -6 cylinder head is torqued. It would seem impossible, from an access perspective, to torque bolt # 7 after the head is on the crankcase.

 

Am correct in assuming that I must torque bolt # 7  it before 4 -6 cylinder head is torqued ??

 

thanks

[JFP in PA]

2 hours ago, tony z said:

Hi

 

My engine has M96/ ....then 10 digits. The first five digits align with the Porsche documentation that came with the car.. I presume the remaining 5 digits are for the transmission ?

 

On another matter the work shop manual says that bolts # 7, 8 and 9 (https://nemigaparts.com/cat_spares/pet/porsche/996/21/101050/) are not supposed to be torqued until the both cylinder heads are torqued.  The manual later on says that bolt # 7 must be torqued before the 4 -6 cylinder head is torqued. It would seem impossible, from an access perspective, to torque bolt # 7 after the head is on the crankcase.

 

Am correct in assuming that I must torque bolt # 7  it before 4 -6 cylinder head is torqued ??

 

thanks

 

Bolts 7, 8 , and. 9 hold the case half’s together and should be accessible.  At this juncture, I’m afraid I need to ask a question: As Porsche never published this information (as these engines were never supposed to be rebuilt in the field) , exactly what “manual” are you working from?

[tony z]

The workshop manual (Technical Manual 911 Carrera (996) Group 1 Engine) including technical updates supplied by the Porsche librarian. I also have the Bentley and Dempsey books (101 Projects).

 

The attached picture shows bolt # 7 with the cylinder head above it.

 

The cylinder head is just sitting on the crankcase and as you will see from the photo it all but obscures access to the bolt head. Bolts # 8 and 9 are not obscured when the cylinder head 1-3 is in situ.

 

The Technical manual is providing contradictory information. Page 87/821 and page 235/821 refers

 

Thanks for your assistance

[Loren]

Exact section numbers from the manual would help. Just guessing from the page location it looks like 3.4 liter engine (page 87) and 3.6 liter engine (page 235).

[Porschelibrarian]

Another problem may be the PDF PET hasnt been updated since 2005.  If you need a supplement or additional TSB let me know and Illl search for it.

[tony z]

Thanks Loren

 

Page 87 is in section 10 (engine and crankcase)

Page 235 is in section 13 (Engine, crankcase and pistons) however page 235 indicates on the right hand top corner "10"

[tony z]

Thanks Loren

 

Page 87 is in section 10 (engine and crankcase)

Page 235 is in section 13 (Engine, crankcase and pistons) however page 235 indicates on the right hand top corner "10"

[tony z]

 Thanks Porsche librarian

 

I have 11 technical updates last one is dated 4/12/2007. If there are later ones I would be interested.

 

Thanks