Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
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.
 

Welcome Guest ( Log In | Register )

> MPS, Rebuilding the MPS
Ron914
post May 8 2025, 05:06 PM
Post #1


Member
**

Group: Members
Posts: 442
Joined: 19-April 22
From: Huntington Beach,Ca
Member No.: 26,487
Region Association: Southern California



Hello to all who have helped me with this project . @emerygt350 ,@TJB/914, @Superhawk996 , @ChrisFoley , @rjames , @MDTerp
I am in the middle of rebuilding my MPS and have a couple of comments and questions .
First when I opened up the unit I found the most difficult job was removing the rivets holding the two halves together.
When I removed the retainer plate to take out the old diaphragm it was in two pieces .
Attached Image
I needed to take two measurements since I was replacing the stop screw , I needed to measure the the stop screw protrusion into the housing . The instruction sheet sent to me by a member had the measurements he must have made when rebuilding his MPS . His stop screw protrusion was 1.97mm and mine only measured 1.72mm.
His inner/outer screw assembly depth in the old diaphragm measured 6.51mm .
Here's one of my questions ?
when I measured mine I got two measurements depth to inner/outer screw assembly was 4.03
and depth to the washer outside the inner/outer screw assembly was 5.46mm.
Again there is a difference and since mine was never accessed before (epoxy over screw was not disturbed) is the difference in measurements ok and which measurement should I use I will try to attach a photo or two to help with my question.
this one .
Attached Image
I have not touched either of these measurements yet and awaiting any help/comments.
I think it's this one to the washer on diaphragm .
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post

Posts in this topic
Ron914   MPS   May 8 2025, 05:06 PM
FlacaProductions   If you get really stuck - let me know. I'm i...   Sep 8 2025, 03:14 PM
emerygt350   If you get really stuck - let me know. I'm ...   Sep 8 2025, 03:28 PM
Ron914   If you get really stuck - let me know. I'm...   Sep 9 2025, 01:45 PM
Ron914   If you get really stuck - let me know. I'm ...   Sep 8 2025, 03:32 PM
FlacaProductions   Ah - ok - missed the part that you have an LCR. Th...   Sep 8 2025, 04:25 PM
emerygt350   Just remember, no faith in the actual lcrs. They ...   Sep 8 2025, 04:42 PM
Superhawk996   Ron I’m late to this post. Don’t really have ...   Sep 8 2025, 07:18 PM
Ron914   Ron I’m late to this post. Don’t really have...   Sep 9 2025, 01:42 PM
emerygt350   I can dig around tomorrow and find them.   Sep 9 2025, 07:00 PM
Ron914   I can dig around tomorrow and find them. Hello E...   Sep 19 2025, 03:26 PM
rjames   If I’m reading the chart on Ander’s site corre...   Sep 19 2025, 04:30 PM
Ron914   If I’m reading the chart on Ander’s site corr...   Sep 19 2025, 05:11 PM
emerygt350   I think we need more info as well. Not well can m...   Sep 19 2025, 04:56 PM
Ron914   I think we need more info as well. Not well can ...   Sep 19 2025, 05:20 PM
emerygt350   I would say absolutely. It such an easy test tha...   Sep 19 2025, 05:16 PM
JeffBowlsby   These should be useful as substitutes for testing ...   Sep 19 2025, 05:19 PM
Ron914   These should be useful as substitutes for testing...   Sep 19 2025, 05:22 PM
emerygt350   I would try the 1.7, if that changes nothing, go b...   Sep 19 2025, 05:38 PM
rjames   ECUs do indeed go bad. You'll find plenty with...   Sep 19 2025, 05:40 PM
rjames   duplicate post   Sep 19 2025, 05:40 PM
Superhawk996   Late to the post but I think the suggestions made ...   Sep 19 2025, 06:35 PM
emerygt350   If it does run it would make searching for or payi...   Sep 20 2025, 06:48 AM
Ron914   Well here is the long awaited update on my MPS/poo...   Sep 30 2025, 09:15 PM
JeffBowlsby   :thumbsup: We admire your persistence Ron. What ...   Sep 30 2025, 09:26 PM
Ron914   :thumbsup: We admire your persistence Ron. What...   Oct 1 2025, 11:11 AM
Superhawk996   :trophy: :beer2: :popcorn:   Sep 30 2025, 10:48 PM
Ron914   :trophy: :beer2: :popcorn: Thanks for your...   Oct 1 2025, 11:09 AM
emerygt350   Yeah! If you are still at static timing that ...   Oct 1 2025, 04:55 AM
Ron914   Yeah! If you are still at static timing that...   Oct 1 2025, 11:07 AM
rjames   Congrats! Way to stick with it! :headbang...   Oct 1 2025, 08:34 AM
Ron914   Congrats! Way to stick with it! :headban...   Oct 1 2025, 11:07 AM
2 Pages V < 1 2


Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 



- Lo-Fi Version Time is now: 6th November 2025 - 05:34 AM
...