 Head Exhaust Stud Question, what is the correct size? |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
| 76-914 |
 Jul 24 2010, 11:56 AM
Post
#1
|
|
Repeat Offender & Resident Subaru Antagonist  Group: Members Posts: 13,652 Joined: 23-January 09 From: Temecula, CA Member No.: 9,964 Region Association: Southern California 
 |
First, I have a stripped hole where the exhaust stud threads into the head. It's a stock 75 2.0 . The PET manual shows #014 397 9, which is AM8 x 56 (what's the "AM" stand for?) qty "8"ea. It also lists #014 684 1, which is CM9 AX MB x 56 (what do "CM", "AX" and "MB" stand for?) qty "X"ea. ( X ???? ) Are there possibly two different diameter studs that were used on the 2.0? The AM 8 is 8mm, right? If so, is the CM9 a 9mm?
Secondly, is there any reason I should not drill and tap/heli coil the head in place from beneath the car. It's looks do-able as hell but thought I would ask here, first. Thx |
   |
 
|
  |
Replies
| 76-914 |
Jul 24 2010, 02:56 PM
Post
#2
|
|
Repeat Offender & Resident Subaru Antagonist Group: Members Posts: 13,652 Joined: 23-January 09 From: Temecula, CA Member No.: 9,964 Region Association: Southern California
|
The current studs do step down in size. One end is 8mm x 1.25 and the other end must be 9mm because it's too loose in a 10mm die. However, I do have 2.0 heads so maybe they were changed out before?? Anyway, the old hole is pretty smooth and there are only 2-3 threads remaining. Anyone here sell the 10 x 8 56 stud that George mentioned or is it dealer item. Also, what is the correct number/letter drill bit for a 10mm tap?
|
|
|
|
Posts in this topic
76-914 Head Exhaust Stud Question Jul 24 2010, 11:56 AM
dr914@autoatlanta.com
First, I have a stripped hole where the exhaust s... Jul 24 2010, 01:03 PM avidfanjpl AA has the 10mm to 8mm stud in their catalog. I ha... Jul 24 2010, 03:27 PM
underthetire http://www.mcmaster.com/#step-studs/=83t12j
And y... Jul 24 2010, 04:59 PM |
2 User(s) are reading this topic (2 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 6th January 2025 - 06:27 PM |
Invision Power Board
v9.1.4 © 2025 IPS, Inc.