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stevo
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Joined: January 22, 2004
Posts: 908
Location: the eugeniverse
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 Posted: Wed Oct 03, 2012 9:38 pm Post subject: mexican bocar 34pict3 familiarity |
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what are the two items seen here below the float? one looks like a jet, but has no hole. the other, along the opposite wall of the pump is another dead end. what do these things do?
if the device along side the pump needs to be cleaned properly, what is the method used to remove it? ..appears clogged with a silver thing-a-ma-jig
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docdanracy
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Joined: June 26, 2012
Posts: 1118
Location: Auburn, CA
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| Posted: Wed Oct 03, 2012 10:04 pm Post subject: |
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All carb jets come out with a large flat blade screw driver.
Yes they are both jets.
Main in float bowl.
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Joey
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Joined: August 12, 2005
Posts: 5366
Location: Nova Scotia - Canada
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| Posted: Thu Oct 04, 2012 3:52 am Post subject: |
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If it doesn't have a screw driver slot or shaped like a bolt then leave it be.
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FNGRUVN
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Joined: October 27, 2007
Posts: 2237
Location: Fort Collins, CO
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| Posted: Thu Oct 04, 2012 6:15 am Post subject: |
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The jet-looking thing is probably just a plug for a drill hole.
The other thing is the cap for the accelerator pump check valve. Look in the hole in the A/P chamber and you'll see the check ball.
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stevo
Samba Member
Joined: January 22, 2004
Posts: 908
Location: the eugeniverse
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| Posted: Thu Oct 04, 2012 6:23 am Post subject: |
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| FNGRUVN wrote: |
The jet-looking thing is probably just a plug for a drill hole.
The other thing is the cap for the accelerator pump check valve. Look in the hole in the A/P chamber and you'll see the check ball. |
can you elaborate on why there would be a drill hole right there?
will look into the chamber. to be sure, the cap is solid, with no pin hole intended? |
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kreemoweet
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Joined: March 13, 2008
Posts: 3898
Location: Seattle, WA
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| Posted: Thu Oct 04, 2012 10:53 am Post subject: |
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Since that "jet"-looking thing has a screwdriver slot in it, presumably you can just screw it out.
Please do that, and tell us what you find! My own Bocar 34 PICT-3 does not have that plug/jet,
just a cone-shaped depression in the metal in the same place.
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stevo
Samba Member
Joined: January 22, 2004
Posts: 908
Location: the eugeniverse
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| Posted: Thu Oct 04, 2012 11:00 am Post subject: |
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| i removed it and found a dead end. supposing it could be drilled out at the carb body, and replaced with a real jet instead of this blank. not finding this scenario on the vw german 34's |
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glutamodo 
The Android
Joined: July 13, 2004
Posts: 26313
Location: Douglas, WY
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| Posted: Thu Oct 04, 2012 12:46 pm Post subject: |
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I think that's one of those throttle positioner emissions carbs. It's been discussed here before, I was trying to find the thread but not much luck. I do remember that was said to be the worst of the Bocar 34PICT-3s - not saying much because their regular versions are usually pretty crappy anyway.
AH, I just found it!
http://www.thesamba.com/vw/forum/viewtopic.php?t=372844&
-Andy |
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stevo
Samba Member
Joined: January 22, 2004
Posts: 908
Location: the eugeniverse
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| Posted: Thu Oct 04, 2012 1:13 pm Post subject: |
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| holy cow! what a report, andy. i'll try, but won't bust my hump over it. thank you, thank you. i have a few vw 34s, however the plug is missing on them. is a ground down dime and jb weld the fix? other choice is german 30/2 using an offset on a dual port 1600. any thoughts and considerations are appreciated. |
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glutamodo
The Android
Joined: July 13, 2004
Posts: 26313
Location: Douglas, WY
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| Posted: Thu Oct 04, 2012 2:37 pm Post subject: |
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the 30PICT-2 is the last carb I'd choose to use.
The venturi plug - yeah, glueing a disc of some kind is about the only
option these days. I don't think you can get replacements anymore. Back in the 1990s when I worked at a VW parts/repair shop we did stock those plugs. But they don't seem to be available as a service part anymore. Anyone who does still list them doesn't have them in stock.
http://www.bughaus.com/carburetor_base_plug_-_113129119A.htm
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RocDoc7
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Joined: April 19, 2011
Posts: 16
Location: North Georgia
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| Posted: Fri Oct 05, 2012 11:20 am Post subject: |
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Nicely translated ! I just wanted to offer: if you need any assistance with other German-language VW tech stuff, I'll be more than happy to help. I was actually living in Germany during all of the 70's when my Beetles were built there, and am fluent in German.
Best,
RocDoc
| glutamodo wrote: |
the 30PICT-2 is the last carb I'd choose to use.
The venturi plug - yeah, glueing a disc of some kind is about the only
option these days. I don't think you can get replacements anymore. Back in the 1990s when I worked at a VW parts/repair shop we did stock those plugs. But they don't seem to be available as a service part anymore. Anyone who does still list them doesn't have them in stock.
http://www.bughaus.com/carburetor_base_plug_-_113129119A.htm
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glutamodo
The Android
Joined: July 13, 2004
Posts: 26313
Location: Douglas, WY
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| Posted: Fri Oct 05, 2012 6:30 pm Post subject: |
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LOL, I don't know if the translation is rubbish or good. I just OCR'd the text and pasted it into Babel Fish or Google Translate and picked out the results that sounded the best. 
-Andy |
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Cadaver
Samba Member
Joined: April 24, 2012
Posts: 2338
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| Posted: Sun Oct 07, 2012 7:19 am Post subject: Re: mexican bocar 34pict3 familiarity |
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| stevo wrote: |
what are the two items seen here below the float? one looks like a jet, but has no hole. the other, along the opposite wall of the pump is another dead end. what do these things do?
if the device along side the pump needs to be cleaned properly, what is the method used to remove it? ..appears clogged with a silver thing-a-ma-jig
|
the bocar is different than a German Solex.
this one has many jets that are unique.
i think its the old style , the new one sold , is more like orig. german.
the main jets. is not seen, its in the bottom slot going to the outside drain plug
the thing (use arrows or letters on the drawing to help)
is the high speed accel pump main suction port, and that silver thingy
is its check ball. if the pump has no check ball it does zilch
just like a missing check ball in a windex bottle pump. same deal.
this 1 brass piece "accel" has an internal thread and can be extracted with
the correct metric threaded screw, just clean it so its all clean with out
removing it. if that dont work, then you must. "rust happens or?"\
that other unique jet is what i think is a power (aux) circuit jet
this was added by Bocar so they can use the carb on many different sized
engines... not just 1.6L
some carbs use only a nozzle port change. others have an actual jet.
2 ways to do this. This is my theory on this 1 jet, i dont have a bocar.
but you can prove it out , by means stated below.
notice the non german bocar , pilot jet on the rear with its unique washer.
you said
. so....
but the top jet is an air jet for MAIN.
if you put labels on each item and ask and refr. each said item.
we can tell you
also you can blow through each path and find the end points.
or flush with carb cleaner , unknown paths and see the end points
that is how i do all carbs.. (sans exploded xray views ,like in the bentleys) there is no bocar exploded diagram for this carb. ive never seen one. (not this older one) (no mex bentleys, sorry)
cheers.
ps. you said no jet hole. i think that is wrong.
the bottom jet even has jet size number on it, see that? AUX?
the accel is not a jet its a check valve port, and has a hole, the ball
keeps the hole blocked until you move the pump (suction action)
try that,see it move? it only sucks about 1cc fuel per stroke.
the last drawning below is the best of the best from VW.
shows all circuits. clearly.
but is not your carb. see that ?
that is the reason i think ITS AUX jet.
"theory" if in my hands, id already know.
some balls are are anti backfire, but the pump is a check ball.
if you look close at your photo i can see the aluminum drill plugs
and those will lead you to the correct path... too....
do you have the link to the full Solex Carb training manual.
its very good.
sadly no bocar yet.
http://www.thesamba.com/vw/archives/manuals/carbur...&ty=81
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