 CFR MPS rebuild, Copy of instructions |
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| Ron914 |
 Apr 28 2025, 10:52 PM
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#1
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Member  Group: Members Posts: 356 Joined: 19-April 22 From: Huntington Beach,Ca Member No.: 26,487 Region Association: Southern California 
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I needed to rebuild my MPS but Chris Foley is out of the kits due to no longer having a supplier of the BE-CU diaphragms . I was lucky enough to have a member here offer to sell me his spare parts kit from Chris (Thanks Tom). His kit did not have the instructions with it so I am wondering if anyone has a copy of those instructions?
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| ChrisFoley |
May 2 2025, 05:57 AM
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I am Tangerine Racing Group: Members Posts: 7,990 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None
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Its a good idea to test the mityvac on a dead ended hose to make certain it doesn't contribute to leakdown rate. I installed a shutoff valve on my setup, between the vacuum pump and the tee.
When I test a MPS unit I pump it down to about 18", close the valve, and expect 5+ minutes with only 1-2" of loss. It's not uncommon for a unit to pass a test at 10-12" of vacuum, but fail during operation in the car. It usually means there is a cracked diaphragm. |
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Posts in this topic
Ron914 CFR MPS rebuild Apr 28 2025, 10:52 PM
MDTerp RE: CFR MPS rebuild Apr 29 2025, 04:26 AM
Ron914
Thank you Michael. @[url=http://www.914world.c... Apr 29 2025, 08:27 AM rjames The hex tool is used in conjunction with the screw... Apr 29 2025, 08:50 AM Ron914
The hex tool is used in conjunction with the scre... Apr 29 2025, 09:31 AM ChrisFoley The reason I recommend using those smaller taps as... Apr 29 2025, 08:54 AM ChrisFoley That's an old tool set pictured. Currently, I ... Apr 29 2025, 08:57 AM ChrisFoley Hi Ron,
I was just on the phone with Tom yesterday... Apr 29 2025, 09:05 AM Ron914
Hi Ron,
I was just on the phone with Tom yesterda... Apr 29 2025, 09:34 AM emerygt350 Those look like good improvements on an already gr... Apr 29 2025, 09:49 AM rjames
Don't overthink it. If both sizes are in the... Apr 29 2025, 10:10 AM ChrisFoley I've been including M4 screws & nuts for a... Apr 29 2025, 10:37 AM MDTerp For me it was also very helpful to install a vacuu... Apr 29 2025, 01:05 PM emerygt350
For me it was also very helpful to install a vacu... Apr 29 2025, 03:20 PM Ron914
For me it was also very helpful to install a vac... May 1 2025, 07:35 AM emerygt350
[quote name='emerygt350' post='3203360' date='Apr... May 1 2025, 09:34 AM Ron914
[quote name='emerygt350' post='3203360' date='Ap... May 1 2025, 11:37 AM TargaToy Well crap. I didn’t realize there was no longer... Apr 29 2025, 07:09 PM Ron914
Well crap. I didn’t realize there was no longe... Apr 29 2025, 07:47 PM emerygt350 I believe Chris is looking for a replacement. Apr 29 2025, 07:29 PM Ron914 After reading a bit of Paul Anders MPS Diagnosis I... Apr 29 2025, 08:48 PM JeffBowlsby
After reading a bit of Paul Anders MPS Diagnosis ... Apr 29 2025, 10:08 PM emerygt350 I agree. I think anders is really doing the deep... Apr 30 2025, 04:33 AM Ron914
I agree. I think anders is really doing the dee... Apr 30 2025, 06:18 PM worn
I needed to rebuild my MPS but Chris Foley is out... Apr 30 2025, 05:30 PM Ron914
I needed to rebuild my MPS but Chris Foley is ou... Apr 30 2025, 05:41 PM emerygt350 Don't worry, the mps is all self contained. T... Apr 30 2025, 06:49 PM Ron914
Don't worry, the mps is all self contained. ... Apr 30 2025, 07:20 PM emerygt350 Your favorite FLAPS. Cheap plastic t works fine. ... May 1 2025, 01:46 PM MDTerp Agree, I use a cheap plastic T connection. Here... May 1 2025, 07:47 PM Ron914
Its a good idea to test the mityvac on a dead end... May 2 2025, 07:46 AM |
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