 How do bearings work?, Aluminum case expansion |
|
|
|
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. |
|
|
| worn |
 May 24 2013, 08:35 PM
Post
#1
|
|
Winner of the Utah Twisted Joint Award  Group: Members Posts: 3,602 Joined: 3-June 11 From: Madison, WI and North Bend WA Member No.: 13,152 Region Association: Upper MidWest 
 |
Calling the experts and anyone else. The case with the holes is aluminum. The crank, cam and lifters are steelish. As the case heats up the holes expand at twice the rate of the steel parts within. So how are for example main bearing clearances maintained as I open the throttle on the ribbon of highway that lies ahead. Shouldn't oughta work. Are they extra tight to start out with? (IMG:style_emoticons/default/unsure.gif)
|
   |
 
|
  |
Replies
| Mark Henry |
May 25 2013, 09:35 AM
Post
#2
|
|
that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
I'm getting that all the time when I post as well, doesn't seem to load, then you press "add reply" again and it double posts.
|
|
|
|
| worn |
May 26 2013, 09:19 AM
Post
#3
|
|
Winner of the Utah Twisted Joint Award Group: Members Posts: 3,602 Joined: 3-June 11 From: Madison, WI and North Bend WA Member No.: 13,152 Region Association: Upper MidWest
|
QUOTE(Mark Henry @ May 25 2013, 07:35 AM)  I'm getting that all the time when I post as well, doesn't seem to load, then you press "add reply" again and it double posts. Well thanks for fixing that. Back to topic I find that gm has filed patents addressing this with main bearings. They found that a very high beryllium aluminum alloy would produce an expansion coefficient like steel. Proposed it for bearing caps. As to the film, how thick is it by the time the warm up is complete? |
|
|
|
Posts in this topic
worn How do bearings work? May 24 2013, 08:35 PM
Jeff Hail
Calling the experts and anyone else. The case wi... May 24 2013, 09:23 PM
Mark Henry
1) tolerance is designed so that the clearance is... May 25 2013, 06:15 AM worn
1) tolerance is designed so that the clearance i... May 25 2013, 09:08 AM McMark Doesn't it expand in all directions... May 24 2013, 09:27 PM stugray
A cylinder will increase in diameter as it heats... May 24 2013, 10:06 PM Vacca Rabite 1) tolerance is designed so that the clearance is ... May 25 2013, 06:03 AM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 9th June 2026 - 02:26 AM |
Invision Power Board
v9.1.4 © 2026 IPS, Inc.