Reproduction Parts for 1916-1964 Chevrolet Passenger Cars & 1918-1987 Chevrolet & GMC Trucks

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VCCA Home Forums TECHNICAL - 1945 AND EARLIER 1929-1932 fuel pump diaphragm removal

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fuel pump diaphragm removal #236011 03/03/12 01:48 PM
Joined: Feb 2012 Posts: 41 Geogia Grill31 OP Shade Tree Mechanic
OP Grill31 Shade Tree Mechanic Joined: Feb 2012 Posts: 41 Geogia	I am trying to rebuild my 31 fuel pump. When I took it apart the push rod and diaphram looks like it is press fit in one piece or somthing. How do you replace just the diaphragm

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Re: fuel pump diaphragm removal Grill31 #236016 03/03/12 02:35 PM
Joined: Nov 2001 Posts: 29,863 Eagle Point, Oregon Junkyard Dog Tech Advisor ChatMaster - 25,000
Junkyard Dog Tech Advisor ChatMaster - 25,000 Joined: Nov 2001 Posts: 29,863 Eagle Point, Oregon	Sounds like you have the wrong fuel pump. The correct fuel pump is an AC-405 and the diaphragm is attached to the threaded rod with a hex nut. On the diaphragm and rod that you have, you will need to grind off the rivet on the top of the rod and then remove the diaphragm. Drill and tap the top of the rod for an 8-32 screw and then you can use the screw and the existing washers to attach the new diaphragm. The Mangy Old Mutt "If It's Not Junk.....It's Not Treasure!"

Re: fuel pump diaphragm removal Junkyard Dog #236022 03/03/12 03:29 PM
Joined: Feb 2012 Posts: 41 Geogia Grill31 OP Shade Tree Mechanic
OP Grill31 Shade Tree Mechanic Joined: Feb 2012 Posts: 41 Geogia	Thank You, its the right year fuel pump, but t was remanufactured and they must have changed out the push rod

Re: fuel pump diaphragm removal Grill31 #236056 03/03/12 09:40 PM
Joined: Nov 2001 Posts: 29,863 Eagle Point, Oregon Junkyard Dog Tech Advisor ChatMaster - 25,000
Junkyard Dog Tech Advisor ChatMaster - 25,000 Joined: Nov 2001 Posts: 29,863 Eagle Point, Oregon	Can you post a photo of the fuel pump? The Mangy Old Mutt "If It's Not Junk.....It's Not Treasure!"

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