 MPS Case Leaks...., Ideas on how to seal? |
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| tvdinnerbythepool |
 Jul 10 2021, 01:10 PM
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#1
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Member  Group: Members Posts: 310 Joined: 24-July 18 From: Olympia, WA Member No.: 22,336 Region Association: Pacific Northwest 
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Hey all,
I rebuilt my MPS last year with the tangerine kit. I fought getting the case to stop leaking after the rebuild as I've seen a few others have this issue too. I used grease on the gasket which seemed to do the trick...that lasted about a year and now yet again I have the case leak. Anyone figure out a permeant solution to this? I am wondering if I can RTV or something to seal the bastard shut. In theory it won't need to be disassembled for a long time. Let me know what you guys think! -R p.s. I've checked the vacuum and hoses to make sure they aren't the culprit. I also checked a used MPS I bought on ebay with the same vacuum setup and it holds steady at 15". Definitely the case 1/2 seal. |
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| 914_teener |
Jul 10 2021, 01:29 PM
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#2
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914 Guru Group: Members Posts: 5,250 Joined: 31-August 08 From: So. Cal Member No.: 9,489 Region Association: Southern California |
Are you running a properly working Decell Valve with your D-jet setup?
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| tvdinnerbythepool |
Jul 10 2021, 01:49 PM
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#3
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Member Group: Members Posts: 310 Joined: 24-July 18 From: Olympia, WA Member No.: 22,336 Region Association: Pacific Northwest
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QUOTE(914_teener @ Jul 10 2021, 12:29 PM)  Are you running a properly working Decell Valve with your D-jet setup? It's a 1970 which I believe did not come with one. |
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| tvdinnerbythepool |
Jul 11 2021, 09:38 AM
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#4
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Member Group: Members Posts: 310 Joined: 24-July 18 From: Olympia, WA Member No.: 22,336 Region Association: Pacific Northwest
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| JeffBowlsby |
Jul 11 2021, 02:03 PM
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#5
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914 Wiring Harnesses Group: Members Posts: 8,781 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None
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They can leak at several locations:
At the diaphragm perimeter gasket At both center diaphragm screws At the diaphragm to center fixture perimeter At the case halves At the electrical plug perimeter and contacts At the rear check valve At the hose to case connection If you try to fix all these and the leak persists them it’s a defective core. |
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