 Oil Relief Valves In Crankcase Galleys, What's The Purpose Of The Secondary Valve |
|
|
|
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. |
|
|
| pilothyer |
 Jan 18 2013, 09:50 AM
Post
#1
|
|
Member  Group: Members Posts: 838 Joined: 21-May 08 From: N. Alabama Member No.: 9,080 Region Association: South East States  |
I have a question about the oil pressure relief pistons on the 914-4. I fully understand the purpose of the primary one's purpose being that it bypasses the oil cooler when the oil is too thick and cold. I am not sure of the reason for the secondary one located under cylinder # 1 in the lifter and cam bearing galley. I can see that if the pressure is enough the piston moves and dumps the oil directly to the crankcase and looks to me like would rob the exhaust valve lifter for cylinder # 1 of it's oil pressure . What is the purpose of this relief valve?
|
   |
 
|
Posts in this topic
pilothyer Oil Relief Valves In Crankcase Galleys Jan 18 2013, 09:50 AM
nathansnathan I have never seen a 'definitive' explanati... Jan 18 2013, 11:44 AM SLITS Not that it matters, but .........
Single relief ... Jan 18 2013, 12:19 PM
nathansnathan
Single relief cases have 8 mm galleries
Dual re... Jan 18 2013, 04:07 PM pilothyer Hey guys, Thanks for the very useful information a... Jan 18 2013, 03:25 PM pilothyer Interesting.....I have an old W case from a 1970 1... Jan 18 2013, 05:10 PM SLITS Dual relief cases began in 1970 and they should be... Jan 18 2013, 05:23 PM pilothyer I thought all 914 engine cases were aluminum, tell... Jan 18 2013, 05:54 PM nathansnathan It's 66psi for the 2.0, 42psi for the 1.7, 1.8... Jan 18 2013, 07:40 PM SLITS From the book, magnesium Type 4 cases had a design... Jan 18 2013, 10:25 PM  |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 3rd June 2024 - 11:22 AM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.