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47silver's Avatar
 
Join Date: Sep 2002
Location: Pittsburgh
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mfi pump question

been cleaning the mfi in wd40 as Warren explained but have a question on how to remove the part #14. It is called "pressure valve complete", I would loke to remove this and put it in an ultrasonic cleaner to get it thoroughly clean but they appear to be stuck and i do not want to mar the threads or aperture.

Does anyone have a method of removing these?

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1975 911S Targa
Silver Anniversary Edition

Last edited by 47silver; 11-09-2017 at 01:43 PM.. Reason: spelling
Old 11-09-2017, 01:42 PM
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figured it out

there are a very tight friction fit. I used a very powerful magnet to pull them out. machined to very tight tolerances.
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1975 911S Targa
Silver Anniversary Edition
Old 11-09-2017, 07:45 PM
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After removing the piston, 13+14 may be tapped out from below. Very carefully, using a plastic rod or similar.

Btw, this manual is highly recommended http://http://911mfi.com
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Hans / 1972T MFI coupe
Old 11-10-2017, 07:23 AM
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The correct tool is a internal threaded rod that screws into the top threaded section of the pressure valve. Once the rod is screwed into the pressure valve, you pull the valve out.
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Mark Jung
Seal Rock, OR
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Old 11-10-2017, 07:52 AM
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thanks all, i see the threads on the outside of the valve, the magnet worked for me but it is a powerful rare earth magnet that you find in hard drives,, may be good to get that tool or make one though..
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1975 911S Targa
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Old 11-10-2017, 09:11 PM
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