Wildguzzi.com
General Category => General Discussion => Topic started by: mabajada on January 21, 2016, 03:51:10 PM
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I'm cleaning /rebuilding carbs for a '78 Lemans.
I understand that there is an o'ring to get to at the pump jet (7 on the diagram). It seems to me that one should just press the jet from inside the carb.
I cannot get them to budge and am concerned about forcing the part too much. Any feedback would be appreciated.
(http://www.dellortoshop.com/contents/media/7851_dellorto_phf_pump_jet_drawing.jpg)
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That's right, after you remove the cap, it just pushes out from the inside. If it's stuck, I use a small piece of wood to save my fingers and hopefully get a straighter push.
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You may need to soak the area with carb cleaner. I would not try to force it, it should push right out.
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It is stuck in the carb body right? Not the screw in cap? I think I remember having the same problem. I didn't want to burr up the brass with vise grips.
Does your pumper jet have two flats on the body. If so, a small wrench may break it loose (after you soak it in carb cleaner).
http://wildguzzi.com/forum/index.php?topic=69557.0
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Yes, the jet that is in the carb body, supposedly with an oring - not the screw cap.
No moving it with a piece of wood. No seeming flat spots, just the slot in the jet - that one could try and pry with a screwdriver which would surely deform it.
Will start soaking it....
(http://i187.photobucket.com/albums/x111/mabajada/File_0001.jpg)
(http://i187.photobucket.com/albums/x111/mabajada/File_0000_2.jpg)
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Yes, the jet that is in the carb body, supposedly with an oring - not the screw cap.
No moving it with a piece of wood. No seeming flat spots, just the slot in the jet - that one could try and pry with a screwdriver which would surely deform it.
Will start soaking it....
Yeah a screwdriver won't work. I tried a big a$$ wide blade and only succeeded in splaying the two sides of the slot. Look very closely. I guess some have the flats and some don't. I had PHM38's so yours may be different.
Good luck.
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There is one flat edge on the jet, this indexes it into the body so it sprays into the carb. Don't try to twist it.
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I am not sure if there is a flat spot on theses Jets. I notice that the slots in the Jets are aligned differently in each carb.
The Jets are stuck in both carbs. O-rings musta turned into some kinda cement.
ON Reassembly-
Does one align the hole in the Holder Screw with the hole in the carb body.
Is the slot in the Jet also suppose to align with the hole in the Holder Screw? (if there is in fact no flat spot) Seems to me that there is enough play between the jet and holder screw that fuel would flow through. I am gleaning some information from this 'gruntled' website.
http://www.gruntled.com/Dellorto/pump_jet.html
Hard for me to tell if these have a flatspot, on guzzio.com's website
(http://ep.yimg.com/ca/I/guzzino_2263_113235733)
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How about dunking the carb in boiling water and then trying to press out the jet?
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There are marks on the sides of the holder screw. One screw the marks align with the holes, the other the marks are perpendicular to the holes. I somehow doubt it's a left-right thing :/
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Have not yet boiled them. I'm assuming that the aluminum will expand more than the brass?
I thought about using a blow torch, but also thought that might be a bad idea.
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Warm it up with the torch, just dont get carried away! DonG
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I must have missed that spot when I rebuild my carburetors, I thought the brass part was pressed fit in as a permanent deal.. didn't realize it had O-rings behind it (explains why I think I had some leftover). All is well on performance, but I'll change them next time.
I soaked my carb bodies for at least 24 hours, but I didn't know to try and push that out.
Try an ultrasonic cleaner of you have access to one. Sometimes those really clear some varnish buildup making the brass fitting maybe come out a little easier (if it's sticking because of that).
If using a torch, use a hobby style type (smaller, more focused flame tip) and heat you around the aluminum, staying away from directly firing in the hole (where the brass part is).
Good luck.
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Tried boiling. It's nice and clean but jet's not moving
Tried flame broiling. Still not moving - seems like alot of aluminum to heat up around the jet, I thing the brass jet is heating up just as fast.
Used a pair of plumbers pliers and some wood to press it out. I realised that the holder screw could be screwed on only part way to allow for movement of the jet, and to provide a surface for the pliers and wood.
Now onto the next.....