 911 Valve Adjusters for my Type-4 2.0L?, Good Idea or Bad Idea? |
|
|
|
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. |
|
|
| ericread |
 Jul 30 2009, 03:49 PM
Post
#1
|
|
The Viper Blue 914  Group: Members Posts: 2,177 Joined: 7-December 07 From: Irvine, CA (The OC) Member No.: 8,432 Region Association: Southern California  |
Somewhere earlier I saw a comment that Jake had recommended using 911 Valve Adjusters in the Type-4 engine... Or maybe he had recommended against it. I can't remember.
Anybody out there have experience in this? My adjusters and adjuster nuts were pretty gnarled when I got my car a few years ago. Now with bi-monthly adjustments, I'm looking to replace them. Will the 911 adjusters fit the existing rocker arms? Do I need the same nuts? If I go ahead with this, should my properly adjusted valves run quieter? And is there any advantage to replacing the springs? As a result of some moderate leaky valve guides, my plans are to have the heads re-built this winter. Should I wait until the heads are rebuilt, or is there any reason I shouldn't go ahead with the adjusters, nuts and springs right now? Any thoughts? My thanks. Eric Read |
   |
 
|
  |
Replies(40 - 43)
| nathansnathan |
Apr 4 2011, 04:25 PM
Post
#41
|
|
Senior Member Group: Members Posts: 1,052 Joined: 31-May 10 From: Laguna Beach, CA Member No.: 11,782 Region Association: None |
Those are the same price as the adjusters Jake is selling at the type 4 store. There it also says OEM German 911 Rocker adjusters. -hard to say whether the stock of parts that Porsche takes delivery of are subject to further quality control than the oem part sold directly from the manufacturer?
|
|
|
|
| Jake Raby |
Apr 4 2011, 06:12 PM
Post
#42
|
|
Engine Surgeon Group: Members Posts: 9,396 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
The difference is we aren't parts whores. We sell what we use and we support it, because we understand it. Looking for cheap price? Won't find it here.
|
|
|
|
| mgphoto |
Apr 11 2011, 09:02 PM
Post
#43
|
|
"If there is a mistake it will find me" Group: Members Posts: 1,341 Joined: 1-April 09 From: Los Angeles, CA Member No.: 10,225 Region Association: Southern California |
I have a few questions, one is about valve rotation. I thought the valve adjusters are supposed to be off center of the valve stem? This I believe was to rotate the valve slightly so the valve and seat would not collect carbon and repeated wear in the same places. With the 911 swivel adjusters what will make the valves rotate if the swivel adjuster can rotate instead?
Also is the valve lash the same with the 911 adjusters in place? Thanks in advance for your responses. Mike ps: Is .060 enough to remove from the underside of the rocker arm? See photo below.  |
|
|
|
| type11969 |
Apr 11 2011, 09:25 PM
Post
#44
|
|
Senior Member Group: Members Posts: 1,231 Joined: 2-December 03 From: Collingswood, NJ Member No.: 1,410 Region Association: North East States |
Clearance them enough so that the feet don't bind during operation. Depending on how much casting (forging?) flash is there, it may be more than .060. Try to finish grinding them with the grind marks not going perpendicular to the length of the rocker, stress risers can be created this way.
The adjuster will still be off the valve axis if it is set up correctly. As the valve is depressed, the foot will still sweep across the valve stem some distance from the valve axis, creating a force/moment that wants to spin the valve. At least that is the way I sees it. -Chris |
|
|
|
|
7 User(s) are reading this topic (7 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 30th June 2024 - 05:50 PM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.