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Old 02-16-2011, 06:02 PM
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quadrajet rebuild removing roll pin help

I'm trying to remove the roll pin from the accelerator pump but it will only move out like 1/8 of an inch. I don't want to hit it too hard so I don't break the air horn. Are some of them supposed to be locked in or something??

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Old 02-16-2011, 06:08 PM
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No they arent. A very clean size punch is a must though. It needs to be just the right size and the end has to be real clean and flat, if it is rounded it stands to just beat up the pin. Some of the Olds quadrajets I have built had a pin that was really a roll. It was like a rolled up newspaper rather than a split pin, those can give you some H*%#.
Once you get it pushed back far enough to get the pump arm off and it is time to push it back, I have used a pair of side cutters to grab it ( sometimes scoup under the end) and then pry it back through into place
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Old 02-16-2011, 06:09 PM
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Quote:
Originally Posted by latech
No they arent. A very clean size punch is a must though. It needs to be just the right size and the end has to be real clean and flat, if it is rounded it stands to just beat up the pin. Some of the Olds quadrajets I have built had a pin that was really a roll. It was like a rolled up newspaper rather than a split pin, those can give you some H*%#.
Once you get it pushed back far enough to get the pump arm off and it is time to push it back, I have used a pair of side cutters to grab it ( sometimes scoup under the end) and then pry it back through into place
X2 on what latech has told you.


Cole
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Old 02-16-2011, 06:11 PM
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I knock it in toward the air horn....It goes in enough to remove the lever....Then I pry it back into place with a sharp screwdriver when reassembling
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Old 02-16-2011, 06:15 PM
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Quote:
Originally Posted by 0pyders
I'm trying to remove the roll pin from the accelerator pump but it will only move out like 1/8 of an inch. I don't want to hit it too hard so I don't break the air horn. Are some of them supposed to be locked in or something??
I suspect it is dragging on the worn spot where the pump lever pivots is why it is sticking, perhaps a new pin is a good idea if that is the case.
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Old 02-16-2011, 06:16 PM
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Quote:
Originally Posted by 0pyders
I'm trying to remove the roll pin from the accelerator pump but it will only move out like 1/8 of an inch. I don't want to hit it too hard so I don't break the air horn. Are some of them supposed to be locked in or something??
You need a small diameter- and I mean small- to drive the roll pin so as to not hit the casting that it goes through. Some roll pins are a larger diameter, but most are 3/32" OD. I made my punch but punches are sold in that size if you don't already have one.

But no, they're not locked in or whatever- they slide out and in the same as normal.

It's a good idea to place a 0.050" feeler gauge or something like that between the roll pin and the air horn lip so you don't jam the roll pin against the lip. This will allow you to get a small straight blade screwdriver behind the roll pin to lever it back into place on reassembly.
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Old 02-16-2011, 06:23 PM
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Thanks for the info guys.
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Old 02-16-2011, 06:31 PM
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roll pins

Don;t know what you're working on, but get a nail that's close but smaller than the pin and cut the lenght of the pin and flat on the end so it won't try sliding into the pin, a large pair of slip joint pliers, and a small 1/4 socket. open the pliers wide enough to put the nail on the inlet side of the pin, put the socket on the outlet side and use the pliers to push the pin out. Becarful not to drop any of the parts. A buddy might help.
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Old 02-16-2011, 06:34 PM
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Quote:
Originally Posted by lanier ledford
Don;t know what you're working on, but get a nail that's close but smaller than the pin and cut the lenght of the pin and flat on the end so it won't try sliding into the pin, a large pair of slip joint pliers, and a small 1/4 socket. open the pliers wide enough to put the nail on the inlet side of the pin, put the socket on the outlet side and use the pliers to push the pin out. Becarful not to drop any of the parts. A buddy might help.
Used this technique before.


Cole
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Old 02-16-2011, 06:43 PM
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Pretty good- 4 posts came in while I was typing my post! I think it's a combination of my slow typing and you guys are good...
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Old 02-16-2011, 06:56 PM
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have had luck using a small drill bit as a punch, just take the flutes off on a grinder so its all shank. works well.
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Old 02-16-2011, 07:10 PM
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Quote:
Originally Posted by cobalt327
You need a small diameter... to drive the roll pin so as to not hit the casting that it goes through. Some roll pins are a larger diameter, but most are 3/32" OD.
Be advised this is the relaxed OD of the roll pin- so if you use something like a drill bit, it will need to be a little smaller than 3/32" to fit w/o interference.
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Old 02-16-2011, 07:20 PM
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Thanks Cobalt, the roll pin is out without a problem now. I have another issue though. You know those 4 little brass tubes that are on the bottom of the air horn? they weren't held into the airhorn and are now sitting on the I think it's called the float bowl? Can I just tap the brass tubes back into the airhorn?
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Old 02-16-2011, 07:27 PM
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yeah, just tap them back into place. They are soft brass so dont over do it, the ends will mushroom and will effectively make the size smaller as it will close the opening at the end.When you put them in take a little dab of locktite and put around them where they go to the air horn before you tap them down, put it on after you have the tube in the hole as to keep from getting it down inside the passageway. wipe off any excess after seating.
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Old 02-16-2011, 07:30 PM
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Thanks again .
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