 Why do valves need adjusting?, What's behind it all? |
|
|
|
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. |
|
|
| kpfoten |
 Nov 25 2008, 01:22 PM
Post
#1
|
|
Member  Group: Members Posts: 220 Joined: 15-April 08 From: Escanaba, MI Member No.: 8,927 Region Association: None  |
I'm a relative newbie when it comes to engine rebuilding, the physics, mechanics, etc, but I'm fascinated by it all and have been reading up on how it all works... I've done my share of valve adjustments, but the thought came to mind--why do we adjust valves? Is it a combination of heat and wear that causes them to need adjusting? Does spring fatigue have something to do with it?? |
   |
 
|
  |
Replies
| kpfoten |
Nov 25 2008, 02:39 PM
Post
#2
|
|
Member Group: Members Posts: 220 Joined: 15-April 08 From: Escanaba, MI Member No.: 8,927 Region Association: None |
Thanks!
I would assume that air cooled motors (even though with valves regularly adjusted) need the heads re-done sooner over time? |
|
|
|
| Cap'n Krusty |
Nov 25 2008, 07:36 PM
Post
#3
|
|
Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
QUOTE(kpfoten @ Nov 25 2008, 12:39 PM)  Thanks! I would assume that air cooled motors (even though with valves regularly adjusted) need the heads re-done sooner over time? Not particularly. BTW, spring fatigue has come up before, and it's not a possible answer, because the valve is a fixed length, the spring retainer is in a fixed location, and any tension at all will cause the valve to be fully closed at rest. Note I said "closed", not "sealed". The Cap'n |
|
|
|
Posts in this topic
kpfoten Why do valves need adjusting? Nov 25 2008, 01:22 PM
749142 Its a combination of heat and wear mainly, the val... Nov 25 2008, 01:28 PM ericread Accordint to Auto Atlanta:
"Proper valve adj... Nov 25 2008, 02:13 PM
Vacca Rabite There is a brilliant B&W video on Youtube abou... Nov 25 2008, 08:28 PM Vacca Rabite Sorry, not B&W, but still old and good. here ... Nov 25 2008, 08:30 PM
kpfoten Thanks! Youtube is great for a lot of rebuild ... Nov 25 2008, 10:05 PM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 15th June 2024 - 10:05 PM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.